AMPSS™
Astec Modular Power Supply System
Series Highlights
•High Efficiency - up to 88%
•100°C baseplate/ case operating temperature - no derating
• Fixed Switching Frequency
•Low output ripple and noise
•High Reliability - over 1 million hours MTBF
•Designed to meet all Telecom specifications
AM80A
Performance
Series
DC-DC Converter Module
Technical Reference Manual
AM80A Performance Series
Rev. 06 Mar 03AMPSS® Reference Manual
2
Contents
Introduction............................................................................................................ 4
Special Features ...................................................................................................... 4
Ordering Information............................................................................................... 5
Safety..................................................................................................................... 5
Electrical Specifications............................................................... 6
Absolute Maximum Ratings – all models ................................................................. 6
Pin Connections - all models ................................................................................... 7
Insulation - all models .............................................................................................. 8
Electrical Specifications for 48V Input Models (AM80A-048L-xxxFyy) .................... 9
Electrical Specifications for 150V Input Models (AM80A-150L-xxxFyy)..................11
Electrical Specifications for 300V Input Models (AM80A-300L-xxxFyy)................. 12
Electrical Specifications for 320V Input Models (AM80A-320L-xxxFyy)................. 14
Functional Description............................................................... 15
Remote Sense (+SENSE, -SENSE) ....................................................................... 15
Enable Control (ENABLE) .................................................................................... 15
Output Voltage Adjustment (V ADJ) ...................................................................... 16
Current Limit Adjustment (C LIM ADJ) ................................................................. 16
Overvoltage Protection Adjustment (OVP ADJ) ..................................................... 16
Power Good/Identification (PG/ID) ....................................................................... 17
Clock Signals (CLK IN, CLK OUT)...................................................................... 17
Current Sharing (C SHARE).................................................................................. 18
Current Monitoring (C MON) ................................................................................ 18
Temperature Monitoring (TEMP MON) ................................................................. 18
Design Considerations ................................................................ 19
Input Bulk Capacitors ........................................................................................... 19
Remote Loads ...................................................................................................... 19
Thermal Data ........................................................................................................ 19
Overtemperature Protection................................................................................... 19
Parallel Connection Considerations ........................................................................ 20
Rev. 06 Mar 03 AMPSS® Reference Manual
Specifications
3
Output Ripple and Noise....................................................................................... 20
Conducted EMI .................................................................................................... 20
Break Regulation................................................................................................... 20
Input Undervoltage Protection ............................................................................... 21
Application Examples................................................................. 22
AC Input Design ................................................................................................... 22
Parallel Connection Design .................................................................................... 22
Mechanical Information............................................................. 23
Dimensions ........................................................................................................... 23
Recommended PCB Layout .................................................................................. 24
Heatsink Mounting Information.............................................................................. 25
AM80A Performance Series
Rev. 06 Mar 03AMPSS® Reference Manual
4
AM80A Performance Series DC-DC Converters
Introduction
The single output AM80A is an isolated, single output
DC to DC converter module, providing up to 252W
output with a maximum baseplate operating temperature
of 100°C with no derating. The AM80A features full
safety isolated low voltage secondary side control and
Astec Linear Programming (ALP™) for convenient
adjustment of the module's parameters.
The dual output AM80A provides two outputs, 3.3V
and 5.0V.
Special Features
•High Efficiency - up to 88%
•1MHz fixed switching frequency
•100°C baseplate/ case operating temperature - no
derating
•Low output ripple and noise
•Excellent transient response
•Safety isolated low voltage interface with ALPTM
linear control
•High Reliability - over 1 million hours MTBF
•Wide input voltage range
•Parallelable with accurate current sharing
•Current and temperature monitoring outputs
Rev. 06 Mar 03 AMPSS® Reference Manual
Specifications
5
Ordering Information
Please contact Astec for information on other output voltages, power ranges and configurations.
Safety UL: UL1950
CSA: CSA C22.2 No.950
VDE: VDE 0805
EN60950
CE: CE Mark
Please contact Astec for information on specific module approvals.
Note: Ensure all modules are used according to the Installation Instructions provided with each module.
Model Number Input
Voltage
Output
Voltage
Output
Current
Output
Power
AM80A-320L-280F09 320V 28V 9A 252W
AM80A-300L-022F60 300V 2.2V 60A 132W
AM80A-300L-033F50 300V 3.3V 50A 165W
AM80A-300L-050F40 300V 5V 40A 200W
AM80A-300L-120F18 300V 12V 18A 216W
AM80A-300L-150F16 300V 15V 16A 240W
AM80A-300L-065F33 300V 6.5V 33A 214.5W
AM80A-300L-240F10 300V 24V 10A 240W
AM80A-300L-280F09 300V 28V 9A 252W
AM80A-150L-065F33 150V 6.5V 33A 214.5W
AM80A-048L-012F60 48V 1.2V 60A 72W
AM80A-048L-022F60 48V 2.2V 60A 132W
AM80A-048L-033F50 48V 3.3V 50A 165W
AM80A-048L-050F40 48V 5V 40A 200W
AM80A-048L-120F18 48V 12V 18A 216W
AM80A-048L-150F16 48V 15V 16A 240W
AM80A-048L-240F10 48V 24V 10A 240W
All modules are designed to meet the following specifications:
ETS300-132-2
ETS300-386-1(1)
EN55022-A(1)
EN55022-B(1)
EN41003
IEC6100-44(1)
IEC6100-45(1)
IEC950
VDE0871-A(1)
VDE0878-A(1)
BTNR2511(5)(1)
(1) Require additional circuitry for full compliance. Please refer to application section of this manual or contact
technical support office for further information.
AM80A Performance Series
Rev. 06 Mar 03AMPSS® Reference Manual
6
Electrical Specifications
Absolute Maximum Ratings – all models
Exceeding the specified absolute maximum ratings may severely damage the module. These ratings are intended as
guidelines for absolute worst case operating conditions and are not to be interpreted as recommended operating
condition
Notes:
* For 300/320V input :
All isolation barriers on 300V input modules have been designed
and tested to meet 4242VDC as required by IEC950 for reinforced
insulation. The complete module should NOT be subjected to a
3000VAC input-to-output test because this can result in input-
baseplate-output breakdown. AMPSS DC-DC modules are CLASS
I equipment. Power supply systems using AMPSS modules MUST
also be CLASS I equipment. Each AMPSS DC-DC module is fully
tested in factory according to the standards. Therefore power
supply systems need only be subjected to Hi-Pot test for BASIC
insulation which is 1500Vac (AC) input to GROUND.
Secondary Control Pins
+SENSE Vo - 0.5 to Vo + 0.5 VDC
-SENSE -0.5 to 0.5 VDC
TEMP MON -0.5 to 7 VDC
C MON -0.5 to 7 VDC
C SHARE -0.5 to 7 VDC
CLK OUT -50 to 50 VDC
CLK IN -50 to 50 VDC
C LIM ADJ -0.5 to 7 VDC
OVP ADJ -0.5 to 7 VDC
V ADJ -0.5 to 7 VDC
PG/ID 0.5 to V
o + 0.5VDC
ENABLE -0.5 to 20 VDC
Note : Vo = module output voltage
All voltage referenced to negative output
Specifications
Electrical characteristics are guaranteed over the full baseplate/ case temperature range (-20 to 100°C) and for the full
range of input voltage (VI) and for the full load range (0 to IO rated). Except where indicated , +SENSE and -SENSE are
connected to the output terminals at the point of measurement, ENABLE is connected to -SENSE. All other pins are left
floating.
Definitions
VI, VO and IO are actual operating conditions, VInom, VOnom and IOrated are nominal ratings.
General 320V Input 300V Input 150V Input 48V Input
Continuous Input Voltage 400V 400V 200V 72V
Input Surge Voltage (1 sec) 425V 425V 225V 75V (continuous)
Isolation, Input to Output* 2700VDC 2700VDC 2700VDC 2100VDC
Isolation Input to Baseplate* 2121VDC 2121VDC 2121VDC 2100VDC
Isolation, Output to Baseplate* 500VDC 500VDC 500VDC 500VDC
Operating Temperature (Baseplate) /Case -20 to 100°C *
Storage Temperature -40 to 105°C
Operating Relative Humidity (non-condensing) 10% to 95%
Storage Relative Humidity (non-condensing) 95% Max
Altitude (Operating) < 3000m
Altitude (Storage) < 9000m
Lead Temperature (soldering 5 Seconds) 235°C
Rev. 06 Mar 03 AMPSS® Reference Manual
Specifications
7
Pin Connections - all models
CONTROL PINS
Pin No Pin Name Type Description Recommended Connections
1+SENSE Input Used for remote sense function
to compensate for load bus
resistance
If remote sensing is not required connect to
+OUTPUT pins 21-24 of the module
2TEMP MON Output
Provides a voltage signal
proportional to the internal
absolute temperature of the
module
Analog signal output. Leave unconnected
if not used
3C MON Output Provides a current signal
proportional to the current
being supplied by the module
Analog signal output. Leave unconnected
if not used
4C SHARE Input/Output Allows modules connected in
parallel to accurately share
current
Connect to C SHARE pins of other
modules. Leave unconnected if not used
5CLK OUT Output Provides a 1MHz clock output
for synchronization with other
modules
Capacitor coupled output. Leave
unconnected if not used
6CLK IN Input Accepts a 1MHz clock input for
synchronization with other
modules
Capacitor coupled input. Leave
unconnected if not used
7PG/ID Output
High level output (VPG/ID = VO)
indicates module converter is
running. Can also be used to
identify the nominal output
voltage of the module by
measuring resistance between
PG/ID and +OUTPUT
ID Resistance = [VO(nom)
]KW
Leave unconnected if not use
8C LIM ADJ Input Used to adjust the current limit
set point Internal 1mA current source. Leave
unconnected if not used
9OVP ADJ Input Used to adjust module output
overvoltage threshold Internal 1mA current source. Leave
unconnected if not used
10 V ADJ Input Used to adjust module output
voltage Internal 1mA current source. Leave
unconnected if not used
11 ENABLE Input
Enables or disables the output of
the module Must be connected to -SENSE pin or driven
to <0.7V to enable the output of the module
12 -SENSE
reference
Used for remote sense function
to compensate for load bus
resistance
If remote sensing is not required connect to
-OUTPUT pins 26-29 of the module
INPUT PINS
Pin No Pin Name Type Description Recommended Connections
31 +INPUT Input Power input - positive A 220µF electrolytic capacitor connected
between the +INPUT and -INPUT pins is
recommended
32 -INPUT Input Power input - negative (return) See + INPUT for recommendations
OUTPUT PINS
Pin No Pin Name Type Description Recommended Connections
21-24 +OUTPUT Output Power output - positive Ensure good electrical connection and
sufficient copper on PCB layouts
26-29 -OUTPUT Output Power output - negative See +OUTPUT for recommendations
AM80A Performance Series
Rev. 06 Mar 03AMPSS® Reference Manual
8
CONTROL SIGNALS
Control Function Conditions Parameter Min Typ Max Units
TEMP MON - temperature
V
T MON
sensitivity
9.8
10
10.2
mV/°C
monitor signal Source impedence
1
KW
C MON - current monitor
I
O
= I
Orated
I
C MON
0.9
1
1.1
mA
signal
Measured Range
20
100
%I
Orated
C SHARE - current share
C SHARE pins of modules in
C SHARE accuracy
±3%
±10
%I
O rated
function parallel connected Max no. of units 10
CLK OUT - clock output
V
CLK OUT
3.3
5.5
Vp-p
CLK IN open Clock freq. 0.98 11.02 MHz
Max fan out 2
CLK IN - clock input
V
CLK IN
3.3
5.5
Vp-p
Clock freq 0.9 11.1 MHz
PG/ID power good Converter running :
V
PG/ID 100
%V
O
/ Identification function
I
O
³ 5%I
Orated
for I
Orated
³ 20A
I
O
> 1A for I
Orated
<20A
Converter not running 320V, 300V &
150V Input VPG/ID 0.2 V
Converter not running 48V Input VPG/ID 1.0 V
5V output 5.00 5.1 6.12
K
Ω
6.5V output
Resistance; PG/ID to
6.66
6.8
7.82
K
Ω
12V output positive output terminal 11.76 12 13.02
K
Ω
15V output 14.70 15 16.02
K
Ω
24V output 23.52 24 25.02
K
Ω
28V output 26.46 27 28.02
K
Ω
C LIM ADJ - current limit
V
C LIM ADJ
= 0.8V
C LIM set point 20
%I
Omax
adjustment
V
C LIM ADJ
= 4.0V
C LIM set point 100
%I
Omax
V
C LIM ADJ
= 1V
C LIM current source 0.95 11.05 mA
OVP ADJ
1
- output
V
OVP ADJ
= 0V
OVP set point
150
%V
Onom
overvoltage protection
V
OVP ADJ
>= 1V
OVP set point
110
%V
Onom
adjustment
V
OVP ADJ
= 1V
OVP ADJ current source
0.95 11.05 mA
V ADJ - voltage adjust
V
Vadj
= 0V
V
O78 80 82
%V
Onom
V
Vadj
= 2V
V
O118 120 122
%V
Onom
V
VADJ
= 1V
V ADJ current source 0.95 11.05 mA
ENABLE - module enable Module enabled
V
ENABLE 00.7 V
Module disabled
V
ENABLE
2
10
V
VENABLE = 0.7V ENABLE current source 100 150 µA
Notes :
1. OVP trip point must be adjusted to accomodate maximum remote sense compensation
All Models
Rev. 06 Mar 03 AMPSS® Reference Manual
Specifications
9
Electrical Specifications for 48V Input Models (AM80A-048L-xxxFyy)
TRANSIENT CHARACTERISTICS
Parameter Conditions Min Typ Max Units
Turn-on time VI = 0 to VInom 110 msec
Transient response Step-load excursion
(25% to 75% load change @ AM80A-048L-012F60 36 60 mV
0.1A/µS, recovery to 1% VO)AM80A-048L-022F60 66 110 mV
AM80A-048L-033F50 100 165 mV
AM80A-048L-050F40 150 250 mV
AM80A-048L-120F18 360 600 mV
AM80A-048L-150F16 450 750 mV
AM80A-048L-240F10 720 1200 mV
Step-load response
AM80A-048L-012F60 400 µS
AM80A-048L-022F60 400 µS
AM80A-048L-033F50 400 µS
AM80A-048L-050F40 400 µS
AM80A-048L-120F18 300 µS
AM80A-048L-150F16 250 µS
AM80A-048L-240F10 300 µS
INPUT CHARACTERISTICS
Parameter Conditions Min Typ Max Units
Input voltage 36 48 72 V
Input surge voltage (continuous) 75 V
Input low line power on voltage Module power on 30 35 V
Input low line power off voltage Module shutdown 24 31.5 V
No load input power
V
I
= V
Inom
5
W
Input capacitance 5µF
Input current Low line, nom VO, max IO
AM80A-048L-012F60 3.3 A
AM80A-048L-022F60 5.3 A
AM80A-048L-033F50 6.2 A
AM80A-048L-050F40 7.0 A
AM80A-048L-120F18 7.5 A
AM80A-048L-150F16 8.3 A
AM80A-048L-240F10 8.2 A
AM80A Performance Series
Rev. 06 Mar 03AMPSS® Reference Manual
10
Electrical Specifications for 48V Input Models (Cont'd)
OUTPUT CHARACTERISTICS
Parameter Conditions Min Typ Max Units
Nominal (factory set) output voltage AM80A-048L-012F60 1.2 V
AM80A-048L-022F60 2.2 V
AM80A-048L-033F50 3.3 V
AM80A-048L-050F40 5.0 V
AM80A-048L-120F18 12.0 V
AM80A-048L-150F16 15.0 V
AM80A-048L-240F10 24.0 V
Output voltage set point accuracy
T
C
= +25°C, V
I
= V
Inom
, I
O
= I
Orated
-1
1
%V
Onom
Remote sense compensation
V
I
= V
Imin
0.5
V
Output voltage adjust
80
120
%V
Onom
Nominal (factory set) output
overvoltage protection trip point
110 115 120 %VO
Overvoltage protection trim range
110
150
%V
O
Line regulation
V
Imin
to V
Imax
; All models
0.2
%V
Onom
except :
AM80A-048L-012F60 10 mV
AM80A-048L-022F60 10 mV
AM80A-048L-033F50 10 mV
Load regulation
I
Omin
to I
Omax
; All models
0.2
%V
Onom
except :
AM80A-048L-012F60 10 mV
AM80A-048L-022F60 10 mV
AM80A-048L-033F50 10 mV
Noise and ripple 20Mhz bandwidth
AM80A-048L-012F60 50 100 mV
AM80A-048L-022F60 50 100 mV
AM80A-048L-033F50 50 100 mV
AM80A-048L-050F40 50 100 mV
AM80A-048L-120F18 120 240 mV
AM80A-048L-150F16 240 300 mV
AM80A-048L-240F10 240 480 mV
Output current AM80A-048L-012F60 0 60 A
AM80A-048L-022F60 0 60 A
AM80A-048L-033F50 0 50 A
AM80A-048L-050F40 0 40 A
AM80A-048L-120F18 0 18 A
AM80A-048L-150F16 0 16 A
AM80A-048L-240F10 0 10 A
Output current limit
V
O
dropped to 90% of V
Onom
105
110
115
%I
Omax
Short circuit current
AM80A-048L-012F60
160
%I
Omax
AM80A-048L-022F60
160
%I
Omax
AM80A-048L-033F50
160
%I
Omax
AM80A-048L-050F40
160
%I
Omax
AM80A-048L-120F18
200
%I
Omax
AM80A-048L-150F16
200
%I
Omax
AM80A-048L-240F10
200
%I
Omax
Temperature coefficient
Per °C Baseplate temperature
0.02
%V
O
/°C
Overtemperature shutdown All models 105 110 120 °C
Efficiency
V
O
= V
Onom
, V
I
= V
Inom,
I
O
= I
Orated
AM80A-048L-012F60 60 64 %
AM80A-048L-022F60 70 72 %
AM80A-048L-033F50 75 80 %
AM80A-048L-050F40 83 84 %
AM80A-048L-120F18 85 87 %
AM80A-048L-150F16 84 87 %
AM80A-048L-240F10 85 88 %
Rev. 06 Mar 03 AMPSS® Reference Manual
Specifications
Electrical Specifications for 150V Input Models (AM80A-150L-xxxFyy)
OUTPUT CHARACTERISTICS
Parameter Conditions Min Typ Max Units
Nominal (factory set) output voltage AM80A-150L-065F33
6.5
V
Output voltage set point accuracy
T
C
= +25°C, V
I
= V
Inom
, I
O
= I
Orated
-1
1
%V
Onom
Remote sense compensation
1
V
I
= V
Imin
0.5
V
Output voltage adjust
80
120
%V
Onom
Nominal (factory set) output overvoltage
protection trip point 110 115 120 %VO
Overvoltage protection trim range
110
150
%V
Onom
Line regulation
V
Imin
to V
Imax
0.2
%V
Onom
Load regulation
0 to I
Omax
0.2
%V
Onom
Noise and ripple
20MHz bandwidth
AM80A-150L-065F33
65
130
mV
Output current AM80A-150L-065F33
0
33
A
Output current limit
V
O
dropped to 90% of V
Onom
105
110
115
%I
Omax
Short circuit current
AM80A-150L-065F33
160
%I
Omax
Temperature coefficient
Per °C Baseplate temperature
0.02
%V
O
/°C
Overtemperature shutdown
Baseplate temperature
105
110
120
°C
Efficiency
V
O
= V
Onom
, V
I
= V
Inom
, I
O
= I
Orated
AM80A-150L-065F33
80
83
%
INPUT CHARACTERISTICS
Parameter Conditions Min Typ Max Units
Input voltage 90 150 200 V
Input surge voltage (1 second) 220 V
Input low line power on voltage Module power on 75 88 V
Input low line power off voltage Module shutdown 60 79 V
No load input power
V
I
= V
Inom
5
W
Input capacitance 1.2 µF
Input current Low line, nom VO, max IO
AM80A-150L-065F33 3A
Input current
Nom line, max V
O
, max I
O
AM80A-150L-065F33 2.1 A
TRANSIENT CHARACTERISTICS
Parameter Conditions Min Typ Max Units
Turn-on time VI = 0 to VInom 1 10 msec
Transient response
Step-load excursion
(25% to 75% load change @ AM80A-150L-065F33 195 325 mV
0.1A/µS, recovery to 1% VO) Step-load response 250 µS
AM80A Performance Series
Rev. 06 Mar 03AMPSS® Reference Manual
12
Electrical Specifications for 300V Input Models (AM80A-300L-xxxFyy)
TRANSIENT CHARACTERISTICS
Parameter Conditions Min Typ Max Units
Turn-on time
V
I
= 0 to V
Inom
1
10
msec
Transient response -
Step-load excursion
(25% to 75% load change @ AM80A-300L-022F60 66 110 mV
0.1A/µS, recovery to 1% VO) AM80A-300L-033F50 100 165 mV
AM80A-300L-050F40 150 250 mV
AM80A-300L-065F33 195 325 mV
AM80A-300L-120F18 360 600 mV
AM80A-300L-150F16 450 750 mV
AM80A-300L-240F10 720 1200 mV
AM80A-300L-280F09 700 1400 mV
Step load response 250 µsec
INPUT CHARACTERISTICS
Parameter Conditions Min Typ Max Units
Input voltage All models - 180 300 400 V
except :
AM80A-300L-065F33 240 300 400 V
AM80A-300L-280F09 200 300 400 V
Input surge voltage (1 second) 425 V
Input low line power on voltage Module power on 150 175 V
Input low line power off voltage Module shutdown 120 157.5 V
No load input power
V
I
= V
Inom
5
W
Input capacitance 0.5 µF
Input current
Low line, nom V
O
, max I
O
AM80A-300L-022F60 1.1 A
AM80A-300L-033F50 1.3 A
AM80A-300L-050F40 1.4 A
AM80A-300L-065F33 1.5 A
AM80A-300L-120F18 1.5 A
AM80A-300L-150F16 1.6 A
AM80A-300L-240F10 1.6 A
AM80A-300L-280F09
1.6
A
Rev. 06 Mar 03 AMPSS® Reference Manual
Specifications
Electrical Specifications for 300V Input Models (Cont'd)
OUTPUT CHARACTERISTICS
Parameter Conditions Min Typ Max Units
Nominal (factory set) output voltage AM80A-300L-022F60 2.2 V
AM80A-300L-033F50 3.3 V
AM80A-300L-050F40 5.0 V
AM80A-300L-065F33 6.5 V
AM80A-300L-120F18 12.0 V
AM80A-300L-150F16 15.0 V
AM80A-300L-240F10 24.0 V
AM80A-300L-280F09 28.0 V
Output voltage set point accuracy
T
C
= +25°C, V
I
= V
Inom
, I
O
= I
Orated
-1
1
%V
Onom
Remote sense compensation
V
I
= V
Imin
0.5
V
Output voltage adjust
80
120
%V
Onom
Nominal (factory set) output
overvoltage protection trip point
110 115 120 %VO
Overvoltage protection trim range
110
150
%V
O
Line regulation
V
Imin
to V
Imax
; All models
0.2
%V
Onom
except :
AM80A-300L-022F60 10 mV
AM80A-300L-033F50 10 mV
Load regulation
I
Omin
to I
Omax
; All models
0.2
%V
Onom
except :
AM80A-300L-022F60 10 mV
AM80A-300L-033F50 10 mV
Noise and ripple 20MHz bandwidth
AM80A-300L-022F60 50 100 mV
AM80A-300L-033F50 50 100 mV
AM80A-300L-050F40 50 100 mV
AM80A-300L-065F33 65 130 mV
AM80A-300L-120F18 120 240 mV
AM80A-300L-150F16 240 300 mV
AM80A-300L-240F10 240 480 mV
AM80A-300L-280F09 280 560 mV
Output current AM80A-300L-022F60 0 60 A
AM80A-300L-033F50 0 50 A
AM80A-300L-050F40 0 40 A
AM80A-300L-065F33 0 33 A
AM80A-300L-120F18 0 18 A
AM80A-300L-150F16 0 16 A
AM80A-300L-240F10 0 10 A
AM80A-300L-280F09 0 9 A
Output current limit
V
O
dropped to 90% of V
Onom
105
110
115
%I
Omax
Short circuit current
AM80A-300L-022F60
160
%I
Omax
AM80A-300L-033F50
160
%I
Omax
AM80A-300L-050F40
160
%I
Omax
AM80A-300L-065F33
165
%I
Omax
AM80A-300L-120F18
200
%I
Omax
AM80A-300L-150F16
200
%I
Omax
AM80A-300L-240F10
200
%I
Omax
AM80A-300L-280F09
200
%I
Omax
Temperature coefficient
Per °C Baseplate temperature
0.02
%V
O
/°C
Overtemperature shutdown Baseplate temperature 105 110 120 °C
Efficiency
V
O
= V
Onom
, V
I
= V
Inom
, I
O
= I
Orated
AM80A-300L-022F60 70 74 %
AM80A-300L-033F50 75 78 %
AM80A-300L-050F40 82 83 %
AM80A-300L-065F33 83 85 %
AM80A-300L-120F18 84 86 %
AM80A-300L-150F16 82 86 %
AM80A-300L-240F10 84 87 %
AM80A-300L-280F09 85 87 %
AM80A Performance Series
Rev. 06 Mar 03AMPSS® Reference Manual
14
Electrical Specifications for 320V Input Models (AM80A-320L-xxxFyy)
OUTPUT CHARACTERISTICS
Parameter Conditions Min Typ Max Units
Nominal (factory set) output voltage AM80A-320L-280F09
28
V
Output voltage set point accuracy
T
C
= +25°C, V
I
= V
Inom
, I
O
= I
Orated
-1
1
%V
Onom
Remote sense compensation
V
I
= V
Imin
0.5
V
Output voltage adjust
80
120
%V
Onom
Nominal (factory set) output
overvoltage protection trip point 110 115 120 %VO
Overvoltage protection trim range
110
150
%V
Onom
Line regulation
V
Imin
to V
Imax
56
mV
Load regulation
0 to I
Omax
56
mV
Noise and ripple
20MHz bandwidth
AM80A-320L-280F09
375
mV
Output current AM80A-320L-280F09
0
9
A
Output current limit
V
O
dropped to 90% of V
Onom
105
110
115
%I
Omax
Short circuit current
AM80A-320L-280F09
200
%I
Omax
Temperature coefficient
Per °C Baseplate temperature
0.02
%V
O
/°C
Overtemperature shutdown
Baseplate temperature
102
105
108
°C
Efficiency
V
O
= V
Onom
, V
I
= V
Inom
, I
O
= I
Orated
AM80A-320L-280F09
86
88
%
INPUT CHARACTERISTICS
Parameter Conditions Min Typ Max Units
Input voltage 256 320 400 V
Input surge voltage (1 second) 425 V
Input low line power on voltage Module power on 200 230 V
Input low line power off voltage Module shutdown 160 205 V
No load input power
V
I
= V
Inom
5
W
Input capacitance 0.5 µF
Input current Low line, nom V
O
, max I
O
AM80A-320L-280F09 1.2 A
TRANSIENT CHARACTERISTICS
Parameter Conditions Min Typ Max Units
Turn-on time VI = 0 to VInom 110 msec
Transient response
Step-load excursion
(25% to 75% load change @ AM80A-320L-280F09 700 1400 mV
0.1A/µS, recovery to 1% VO) Step-load response 800 µS
Rev. 06 Mar 03 AMPSS® Reference Manual
Specifications
Functional Description
This section explains how to implement the functions
found on the AM80A Performance Series.
Remote Sense (+SENSE, -SENSE)
Connect the +SENSE and -SENSE pins of the AM80A
directly to the load to allow the module to compensate for
the voltage drop across the conductors carrying the load
current. If remote sensing is not required (for example if the
load is close to the module) the sense pins should be
connected directly to the module’s output pins to ensure
accurate regulation.
Note: If the sense leads fail open circuit, the module will
revert to local sense at the output pins. Incorrect
connection of sense leads may damage the module
Enable Control (ENABLE)
The enable pin is a TTL compatible input used to turn
the output of the module on or off. The module output
is enabled when the ENABLE pin is connected to -
SENSE or driven to a logic low of <0.7V (but not
negative).
The output is disabled when the enable pin is open or
driven to a logic high >2V. All monitoring and house-
keeping functions (including clock signals) continue to
operate normally.
AM80A Performance Series
Rev. 06 Mar 03AMPSS® Reference Manual
16
Output Voltage Adjustment (V ADJ)
The output voltage of the module may be accurately
adjusted by up to ±20% of the nominal factory set output.
Adjustment is carried out using either an external voltage
source (0 to 2V, capable of sinking 1mA) or a resistor (0 to
2K) connected between V ADJ and -SENSE.
Current Limit Adjustment (C LIM
ADJ)
A constant current limiting circuit protects the module
under overload or short circuit conditions.
With the C LIM ADJ pin left unconnected the current
limit is factory set to 115% of the module's rated output,
but may be adjusted across the range from 20% to 100%
using an external voltage source (0.8 to 4V, capable of
sinking 1mA) or a resistor (800R to 4K) connected
between C LIM ADJ and -SENSE.
Overvoltage Protection Adjustment
(OVP ADJ)
An independent overvoltage circuit monitors the module's
output pins and will shut the module down in the event of
an internal or external fault which causes the output
voltage to rise above the preset limit. The module is reset
by removing and re-applying the input power or toggle the
ENABLE OFF/ON.
Rev. 06 Mar 03 AMPSS® Reference Manual
Specifications
Clock Signals (CLK IN, CLK OUT)
The module's internal clock is accurate and stable over its
full operating range and synchronization is not normally
required, but it can reduce noise in paralleled systems.
Clock signals can be wired in series (the CLK OUT pin of
one module to the CLK IN pin of the next etc) in which
case all the modules will be synchronized with the first
module in the chain. Alternatively, an external clock signal
of 5Vpk-pk at 1MHz±10% can be connected to the CLK IN
pins of all the modules.
If the clock input to any module fails, the module will
automatically switch back to its internal clock and will
continue to operate normally. The CLK IN and CLK OUT
signals are AC coupled, so any module can clock another
module regardless of polarity.
The resistance between the PG/ID pin and the +ve output
of the module can be used to determine the output voltage
of the module with no power applied according to the
table:
Output Voltage
(V)
Resistance
(K
ΩΩ
)
1.2 1.2
2.2 2.2
6.5 6.8
3.3 3.3
55.1
12 12
15 15
24 24
28 27
Power Good/Identification (PG/ID)
This pin provides an indication that the module's converters
are working, and can also be used to identify the factory set
output voltage of the module.
The PG/ID pin goes high to the level of the output voltage
(VO) to indicate that the module is operating and delivering
power. The output goes low if the converters stop operating
due to a fault such as an overtemperature or overvoltage
condition. The PG/ID pin will also go low if the module is
disabled via the ENABLE pin or under light load condition
(seespecification).
The overvoltage set point may be adjusted between 10%
and 50% above the output voltage (VO), and automatically
tracks adjustments made to the output voltage using V
ADJ.
OVP ADJ should be used to increase the OVP margin if the
voltage drop between power output pins and remote sense
is more than 0.2V
AM80A Performance Series
Rev. 06 Mar 03AMPSS® Reference Manual
18
Current Sharing (C SHARE)
To ensure that all modules in a parallel system accurately
share current, the C SHARE pins on each module should
be connected together.
The voltage on the C SHARE pins represents the average
load current per module. Each module compares this
average with its own current and adjusts its output voltage
to correct the error. In this way the module maintains
accurate current sharing.
Note: The -SENSE and +SENSE pins of each module must
also be connected together to ensure accurate current
sharing.
Current Monitoring (C MON)
The C MON pin provides an indication of the amount of
current supplied by the module. The output of the C MON
pin is a current source proportional to the
Temperature Monitoring (TEMP
MON)
The TEMP MON pin provides an indication of the
module's internal temperature.The voltage at the TEMP
MON pin is proportional to the temperature of the module
baseplate at 10mV per °C, where:
Module temperature (°C) = (VTEMP MON x 100) - 273
The temperature monitor signal can be used by thermal
management systems (e.g. to control a variable speed fan).
It can also be used for overtemperature warning circuits
and for thermal design verification of prototype power
supplies and heatsinks.
output current of the module, where 0.2 to 1mA = 20 to 100%
IO rated.
The C MON output can be paralleled with C MON outputs
from other modules to indicate the total current supplied in a
paralleled system.
Rev. 06 Mar 03 AMPSS® Reference Manual
Specifications
Design Considerations
Input Bulk Capacitors
Electrolytic bulk reservoir capacitors placed close to the
module input pins are recommended to ensure the module
is fed with a low source impedance. For the AM80A
Performance Series module typical values are 220µF/100V
for 48V modules and 220µF/450V for 300/320V modules.
Input Fusing
AMPSS modules do not have an in-line fuse fitted
internally. In order to comply with CSA, VDE and UL
safety regulations it is recommended that a fuse of the
following rating be fitted at the module's input.
Remote Loads
If the sensed load is some distance from the module, the
module's output voltage may rise sufficiently to trigger the
OVP protection circuit during a step load change due to
bus inductance. For this reason the OVP margin should be
increased in extreme cases. Fitting a decoupling capacitor
at the load can reduce this effect.
It should be noted that a distributed power solution, using
AMPSSTM modules placed close to their loads, will
optimize transient response.
Thermal Data
Natural convection thermal impedance of the AM80A
package without a heatsink is approximately 4°C/W.
The below characteristic is for a standard horizontal fin
heatsink available from Astec (part number APA501-80-
002) with 11mm fins and 8mm pitch. The heatsink will
reduce module thermal impedance to 1°C /W with a forced
air flow of 250 LFM when mounted with a thermal pad
(ASTEC P/N APA502-80-001) between heatsink and
module.
Overtemperature Protection
If the module's baseplate temperature exceeds 110°C, the
module will latch OFF. To reset the module the input
supply or the enable pin of the module must be cycled off
and then on again, allowing a period of time for the module
to cool down.
Overtemperature shutdown can also be programmed to
occur at lower temperatures by using the TEMP MON
output to control the ENABLE pin.
0
0.2
0.4
0.6
0.8
1
1.2
0200 400 600 800 1000
Vair (LFM)
Thermal Resistance Baseplate to
Ambient (°C/W)
Forced Convection for APA501-80-002
at 200W Output
Input Fuse Rating
300V/320V 10A / 250V
150V 10A / 250V
48V 10A / 250V
AM80A Performance Series
Rev. 06 Mar 03AMPSS® Reference Manual
20
Parallel Connection Considerations
A master-slave configuration is not required for AMPSSTM
modules. AM80A modules may be connected in parallel
using a simple, single wire connection.
Current Sharing
In multi-module paralleled systems, all modules will share
current to within ± 3% (typical) of the rated
load current per module when the C SHARE pins of each
module are connected together.
The +SENSE and -SENSE pins of each module should be
connected to common points as close as possible to the
load.
Synchronization
Modules are synchronized by connecting the CLK OUT
pin of one module to the CLK IN pin of the next. Consecu-
tively connected modules operate out of phase with each
other, resulting in ripple cancellation at the inputs and
outputs of paralleled modules. If the clock input to a
module fails, it will automatically revert to its internal clock
and continue to operate normally.
Conducted EMI
Although AMPSS modules contain both common mode
and differential mode input EMI filtering, power supply
systems using these modules will require additional EMI
filtering to enable the system to meet relevant EMI
standards.
AM80A modules have an effective input to ground
(baseplate) capacitance of 700pF for 300V input models
and 580pF for 48V input models. This should be
accounted for when calculating the maximum EMI ‘Y’
capacitance to meet ground leakage current specifications.
Break Regulation
AM80A Performance Series modules are designed to
deliver full rated output current at up to 0.5V above VO nom
at the minimum specified input voltage.
Output Ripple and Noise
AM80A Performance Series modules are designed to
generate very low ripple and noise. When mounted on
logic boards, for example, sufficient decoupling is normally
provided by the components used to decouple the logic
ICs, and no additional decoupling is required.
Rev. 06 Mar 03 AMPSS® Reference Manual
Specifications
Input Undervoltage Protection
An input undervoltage protection circuit protects the
module under low input voltage conditions. Hysteresis is
built into the AM80A Performance Series module to allow
for high levels of ripple on the input supply voltage
without causing the module to cycle on and off. Typically
320V modules will turn on when the input exceeds 220V
and turn off below 180V. 300V modules will turn on when
the input exceeds 160V and turn off below 140V. 48V
modules will turn on above 33V and turn off below 28V
(see Electrical Specifications for exact figures).
AM80A Performance Series
Rev. 06 Mar 03AMPSS® Reference Manual
22
Application Examples
AC Input Design
Parallel Connection Design
Rev. 06 Mar 03 AMPSS® Reference Manual
Specifications
Mechanical Information
Dimensions
The dimensions are given in mm (inches). Note that the
baseplate must be connected to protective earth before
power is supplied to the module.
Control pins are tin plated phospher-bronze.
Input and output pins are tin plated copper.
The AM80A Performance Series module may be mounted
to a board either by soldering or by using spring sockets.
Materials :
Recommended PCB Layout
Heatsink Mounting Information
Heatsinks for AMPSSTM modules are available in a variety
of sizes and fin orientation. Mounting kits and thermal pads
are also available. The table below shows the options
available for AM80A Performance Series.
A heatsink mounting kit provides the most convenient way
to mount the heatsink to the module and then mount the
assembly onto a circuit board
12
Description Model Number Dimensions Free air thermal
inches mm resistance
Heatsink, "80" size, vertical fin. APA501-80-001 4.53x2.32x0.6 115x59x15 2.7°C/W
Heatsink, "80" size, horizontal fin APA501-80-002 4.53x2.32x0.6 115x59x15 2.4°C/W
Heatsink, "80" size, vertical fin. APA501-80-003 4.53x2.32x0.9 115x59x22.5 2.2°C/W
Heatsink, "80" size, horizontal fin APA501-80-004 4.53x2.32x0.9 115x59x22.5 2.0°C/W
Heatsink, "80" size, vertical fin. APA501-80-005 4.53x2.32x1.5 115x59x37 2.0°C/W
Heatsink, "80" size, horizontal fin APA501-80-006 4.53x2.32x1.5 115x59x37 1.7°C/W
Heatsink, "80" size, low profile APA501-80-007 4.55x3.50x0.5 115.6x89x12 2.2°C/W
Thermal Pad, "80" size APA502-80-001
Mounting Kit, Tapped Studs APA503-00-001
Mounting Kit, Solder Studs APA503-00-002
Mounting Kit, Tapped Studs APA503-00-007
for low profile heatsink
Mounting Kit, Solder Studs APA503-00-008
for low profile heatsink
Spring Sockets (20 cont. 15pwr) APA504-00-001
To provide optimal thermal contact between heatsink and module, it is recommended that the mating surface of the
heatsink should have a surface flatness of no greater than 0.1mm. The use of a thermal pad or thermal grease is also
recommended.
AMPSSTM modules may be retained by their in put and
output pins only, or may be fixed to the board th cases the
studs provide clearance between the module and the circuit
board to facilitate PCB cleaning operations.
Note: 1) Baseplate and heatsink must be connected to protective earth.
2) Mechanical support must not induce twist in the module baseplate and must incorporate strain relief,
e.g. spring washers.
The recommended torque of using AMPSS mounting kit for module/heatsink is:
Torque sequence:
It is assumed that all four mounting screws are being torqued to a common surface.
Other thermal management schemes are at customer discretion as long as the maximum thermal rating of the specific
module is not exceeded.
Screw size Torque
M3 4-6kg-cm (3.5-5.2 lb-in)
M3.5 6-8kg-cm (5.2-6.9 lb-in)
EUROPE
ASTEC EUROPE LTD.
Astec House, Unit 9,
Waterfront Business Park,
Merry Hill, Dudley
DY5 1LX
U.K.
Tel : 01384-842211
Fax : 01384-843355
NORTH AMERICA
ASTEC AMERICA, INC,.
5810 Van Allen Way,
Carlsbad CA 92008,
USA.
Tel : 760-930-4600
Fax : 760-930-0698
For further information contact :
ASIA
ASTEC AGENCIES LIMITED
Unit 2111-2116, Level 21
223, Hing Fong Raod
Kwai Fong
N.T.
Hong Kong
Tel : 852 2437-9662
Fax : 852 2402-4426
APA701-AM80 Rev. 06 Mar03