ALQ15GM48-D - Emerson Network Power - Embedded Power

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 1 OF 19

JANUARY 24, 2003 - REVISION B

ALQ15 Dual Output Open-Frame DC-DC Converter Module

Industry Standard ¼ Brick: 36V-75V Input / 60W Output Power

The ALQ15 series is Astec's latest dual output; high-density converter offering that comes in an industry standard ¼ brick

open-frame package. With its independently controlled output rails, the module effectively minimizes cross regulation, which

has been an issue to most dual converters available in the market. The ALQ15 series has been designed to deliver 60W of

clean, well-regulated, low noise DC power for today's demanding loads at respectable efficiency levels: 3.3V-2.5V

combination @ 87.5% (60W output power). Output combinations currently available are 5.0V/3.3V - 3.3V/2.5V - 3.3V/1.8V -

2.5V/1.5V, with each output rail able to deliver 15A max (5V@12A). The module comes with standard feature sets such as

output enable with positive or negative options; output voltage-adjust; over current, over voltage and over temperature

protection. In addition, it is also being offered at both 5mm (std) and 3.7mm pin lengths.

Special Features

• Tight Regulation

• Low Ripple and Noise at < 30mVPK-PK

• Industry Standard ¼ Brick Footprint

• Positive and Negative Enable Options

• Regulation to Zero Load

• High Capacitive Load Start-up

• Fixed Switching Frequency

• Output Trim

• Input Under-Voltage Lockout

• Basic Insulation

Environmental Specifications

• -40ºC to 85ºC Operating Temperature

• -40ºC to 125ºC Storage Temperature

• Designed for > 1 million hours MTBF

Electrical Parameters

Input

Input Range 36-75 VDC

Input Surge 100V / 100ms

Efficiency 5.0V/3.3V @ 89% (Typ at 60W)

3.3V/2.5V @ 87%

3.3V/1.8V @ 86%

2.5V/1.5V @ 84%

Control

Enable TTL compatible

(Positive and Negative Enable Options)

Output

Load Current 15A max per channel (60W max)

5V @ 12A max

Line/Load Regulation < 10mV (Typ)

Ripple and Noise 30mVPK-PK max

Output Voltage

Adjust Range ±10% Vo

Transient Response 3% VO deviation max (3.3V)

50% to 75% Load Change

220 µ

µµ

µsec typical settling time

(for 3.3V)

Over Current

Protection 130% IO,max typical

Safety

UL + cUL 60950, Recognized (Pending)

EN60950 through TUV-PS (Pending)

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 2 OF 19

JANUARY 24, 2003 - REVISION B

ALQ15 SERIES

MODEL NAME CONSTRUCTION VOUT / IOUT

ALQ15AF48 Open Frame 5.0V-12A / 3.3V-15A

ALQ15FG48 Open Frame 3.3V-15A / 2.5V-15A

ALQ15FG48N-6D* Open Frame 3.3V-15A / 2.5V-15A

ALQ15FY48 Open Frame 3.3V-15A / 1.8V-15A

ALQ15GM48 Open Frame 2.5V-15A / 1.5V-15A

OPTIONS: SUFFIX

Negative Enable: "N"

Positive Enable: No suffix

3.7mm (nominal) Pin Length: "-6"

* Check Part Numbering Scheme on Table 2 and the corresponding external trim

function on Table 1-D

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 3 OF 19

JANUARY 24, 2003 - REVISION B

Electrical Specifications

STANDARD TEST CONDITION on a single module unless otherwise specified.

TA: 25ºC (Ambient Air)

+VIN: PIN 1 48V ± 2V

ENABLE: PIN 2 Open (Positive Enable)

-VIN: PIN 3 Return Pin for +VIN

+VOUT2: PIN 4 Connect to Load 2

-VOUT: PIN 5 Return Pin for Load 1 & 2

TRIM: PIN 6 Open

+VOUT1: PIN 7 Connect to Load 1

Airflow Refer to the appropriate derating curve

ABSOLUTE MAXIMUM RATINGS

Stresses in excess of the absolute maximum ratings can cause permanent damage to the converter. Functional

operation of the device is converter is not implied at these or any other conditions in excess of those given in the

operational section of the specs. Exposure to absolute maximum ratings for extended period can adversely affect

device reliability.

Parameter Device Symbol Min Typ Max Unit

Input Voltage:

Continuous

Transient(100ms) :

All

VIN

VI N, trans

0

-

75

100

Vdc

Operating Ambient Temperature1 All TA -40 - +85 ºC

Storage Temperature All TSTG -55 - 125 ºC

Operating Humidity All - - - 85 %

I/O Isolation All - 1500 - - Vdc

Maximum Enable Voltage All TBD Vdc

NOTE: 1. Power Derating applies. Refer to Figures 15 to 18.

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 4 OF 19

JANUARY 24, 2003 - REVISION B

Electrical Specifications (continued)

INPUT SPECIFICATION

Parameter Device Symbol Min Typ Max Unit

Operating Input Voltage All VIN 36 48 75 VDC

Maximum Input Current2

Conditions: VIN = between 0 to VIN,min

PO = PO,max; TA = 25 ºC

AF

FG

FY

GM

IIN,max -

-

2.20

2.27

A

Input Reflected Ripple Current3

Conditions: PO = PO,max; TA = 25 ºC

All II1/ II2 - 10 25 mAPK-PK

Standing Loss

Condition: VIN = VIN,nom; TA = 25 ºC

All - - - 2.8 W

NOTE: 2. The power module is not internally fused. An input line fuse (e.g. Little fuse 3AB /322003 or 314003) is

recommended.

3. See Figure 1 for Input Reflected Ripple Current Test Setup.

OUTPUT SPECIFICATIONS

Parameter Device Symbol Min Typ Max Unit

Voltage Setpoint

Conditions: VI = VIN,nom; TA = 25 ºC;

VO1: IO1 = IO,max; PO = 60W

VO2: IO2 = IO,max; PO = 60W

AF

FG

FY

GM

VO1/ V O2

4.93 / 3.25

3.25 / 2.46

3.25 / 1.76

2.46 / 1.47

5.00 / 3.30

3.30 / 2.50

3.30 / 1.80

2.50 / 1.50

5.08 / 3.35

3.35 / 2.54

3.35 / 1.84

2.54 / 1.53

Vdc

Load Current 5.0V

3.3V

2.5V

1.8V

1.5V

IO1/IO2

0

-

12.0

15.0

A

Combined Output Power

PO = PO1 + PO2

AF

FG

FY

GM

PO

-

60

W

Line Regulation:

Conditions: VIN = VIN, min to VIN, max;

IO1 = IO, max, IO2 = IO, min

VIN = VIN, min to VIN, max;

IO1 = IO, min, IO2 = IO, max

5.0V

3.3V

2.5V

1.8V

1.5V

-

0.06

0.03

0.15

0.10

%Vo

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 5 OF 19

JANUARY 24, 2003 - REVISION B

Electrical Specifications (continued)

OUTPUT SPECIFICATIONS

Parameter Device Symbol Min Typ Max Unit

Load Regulation4

Conditions: IO = 1A to IO,max;

VIN =VIN,nom

5.0V

3.3V

2.5V

1.8V

1.5V

-

0.06

0.12

0.20

0.26

0.33

0.15

0.30

0.40

0.60

0.70

%Vo

Cross Regulation4

Conditions: VIN = VIN,nom, IO = IO,max

All - - 0.15 %Vo

Temperature

Conditions: TA = -40 ºC to +65 ºC;

VIN = VIN,nom; IO = IO,max

All

-

1.75

%Vo

Output Ripple and Noise:

Peak-to-Peak5

Conditions: IO = IO,max; VIN =VIN,nom;

BW = 20 MHz;

T

A =25 oC

5.0

3.3

2.5

1.8

1.5

-

12

18

25

30

mVPK-PK

External Load Capacitance6 All - - 10000

µF

Over Current Limit Inception

Conditions: Vo = 90% VO,nom;

IO2 = IO,min; VIN = VIN,nom

Characteristics: Hiccup mode,

auto-recovery

All

5.0V

IO,OCP

16.5

13.2

-

25

22

A

Output Short Circuit

Conditions: VIN = VIN,nom; IO2 = 0A

TA = 25 ºC

All

IOPK

IORMS

IODC

IINS

-

28

5

1

150

APK

ARMS

A

mA

Efficiency

Conditions: VIN = VIN,nom; TA = 25 ºC

PO = PO,max, balanced

current loading

AF

FG

FY

GM

η

89.0

87.0

86.0

83.0

89.5

87.7

86.5

84.0

90.5

88.5

87.5

85.0

%

Switching Frequency

Note: Can be determined from output

ripple waveform

All - - 300 375 KHz

NOTE: 4. Channel under test shall follow the specified conditions while the other channel is set to min load, 0A.

5. Channel under test shall be set to full load with the other channel set to IO, min - See Fig 2 for the

recommended output ripple and noise test setup.

6. Refer to YSC plots on Fig 19 and 20 to determine loop stability at various output load impedance.

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 6 OF 19

JANUARY 24, 2003 - REVISION B

Electrical Specifications (continued)

OUTPUT SPECIFICATIONS

Parameter Device Symbol Min Typ Max Unit

Dynamic Response7

Conditions: ∆IO/∆t = 0.15A/µs ;

VIN = VIN,nom ; TA = 25°C

Peak Voltage Deviation

Load Change: IO = 50% to 75% or

75% to 50% IO,max

5.0V

3.3V

2.5V

1.8V

1.5V

-

0.8

1.3

1.6

2.3

2.8

2.0

3.0

5.0

%Vo

Transient Settling Time

Note: VO,nom (ref.)

(from ref. to 0.1∆VPK)

5.0V

3.3V

2.5V

1.8V

1.5V

-

360

220

210

145

136

500

300

µsec

Turn-On Time

Conditions: VIN = VIN,min; IO1 = IO,max,

IO2 = IO,min; TA = 25°C

Note: VO1 within 1%

AF

FG

FY

GM

-

21

16

14

30

msec

Output Voltage Overshoot

Conditions: VIN = VIN,nom; TA = 25°C;

P

O = 0W

5.0V

3.3V

2.5V

1.8V

1.5V

-

0

1

2

3

1

2

4

%VO

NOTE: 7. Dynamic response tested with 10uF-aluminum and 1uF-tantalum capacitors across the load.

FEATURE SPECIFICATION

Parameter Device Symbol Min Typ Max Unit

Undervoltage Lockout

Turn-on Point

Turn-off Point

All

-

32

35.0

34.0

36.0

-

V

Output Voltage Adjustment Range

Conditions: VIN = VIN,nom; TA = 25°C

VO1: IO1 = IO,max, IO2 = IO,min

V

O2: IO1 = IO,min; IO2 = IO,max

Note: Tolerance = ± 1%

All - 90 - 110 %VO

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 7 OF 19

JANUARY 24, 2003 - REVISION B

Electrical Specifications (continued)

FEATURE SPECIFICATION

Parameter Device Symbol Min Typ Max Unit

Enable Pin Voltage

POSITIVE LOGIC

Logic Low: Module OFF

Logic High: Module ON

w/o N-

Suffix

VENABLE

0

1.8

-

2.5

5.0

V

NEGATIVE LOGIC

Logic Low: Module ON

Logic High: Module OFF

N-

Suffix

VENABLE

0

1.8

-

2.5

5.0

V

Enable Pin Current

Logic Low

Logic High: (ILKG at VENABLE = 5V)

All

IENABLE

-

1.0

50

mA

µA

Module Output Voltage

at Logic High (Negative Enable)

at Logic Low (Positive Enable)

N-

Suffix

w/o N-

Suffix

VO

-

1.2

V

Output Over Voltage Clamp

Conditions: VIN = VIN,nom; TA = 25°C

Characteristics: Hiccup mode;

auto-tracking wrt Vout

trim

5.0V

3.3V

2.5V

1.8V

1.5V

VO,CLAMP

5.7

3.8

2.8

2.0

1.7

6.0

3.9

3.0

2.2

1.8

6.5

4.3

3.4

2.4

2.1

V

Over-Temperature Shutdown

Note: 1. Tcomp(max) < 140 °C

2. Measured in the vicinity

of pin 3 and R29

All TB 110 115 120

°C

ISOLATION SPECIFICATION

Parameter Device Symbol Min Typ Max Unit

Isolation Capacitance All - - 680 - pF

Isolation Resistance All - 10 - -

MΩ

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 8 OF 19

JANUARY 24, 2003 - REVISION B

SAFETY APPROVAL

The ALQ15 series have been certified through:

• UL + cUL 60950, Third Edition - Recognized (PENDING)

• EN 60950 through TUV-PS (PENDING)

• Basic Insulation

Fi

g

ure 2. Peak to Peak Out

p

ut Noise Measurement Setu

p

.

Fi

g

ure 1. In

p

ut Reflected Ri

pp

le Current Measurement Setu

p

.

BATTERY

Cs 220 uF

ESR < 0.1 OHM

@ 20 ºC, 100 kHz

Ltest

12 uH

33 uF

ESR < 0.7 OHM

@ 20 ºC, 100 kHz

Vi(+)

Vi(-)

TO OSCILLOSCOPE

N

ote: Measure the input reflected ripple current with a simulated source

inductance (Ltest) of 12uH. Capacitor Cs offsets possible battery/

source impedance. Measure current as shown above.

Vo(+)

Vo(-)

RESISTIVE

LOAD

10 uF1 uF SCOPE

COPPER STRIP

N

ote: Use a 1µF 50V X7R ceramic capacitor and a 10µF 25V tantalum cap.

Scope measurement should be made using a BNC probe socket positione

d

about 76mm (3 in.) away from the module’s output terminals. The ext.

capacitors should be placed between the BNC socket and the module’s

output terminals, with a minimum distance of 51mm (2in.) from the latter.

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 9 OF 19

JANUARY 24, 2003 - REVISION B

Basic Operation and Features

INPUT UNDER VOLTAGE LOCKOUT

To prevent any instability to the converter that may affect and consequently damage the end system, the ALQ15 series have

been designed to turn-on once VIN is in the voltage range of 35-36 VDC. Likewise, it has also been programmed to turn-off

when VIN drops down to 32-34 VDC.

OUTPUT VOLTAGE ADJUST/TRIM

The converter comes with a TRIM pin (PIN 6), which is used to adjust both outputs simultaneously by as much as 90% to

110% of its set point. This is achieved by connecting an external resistor as described below.

To INCREASE the output voltages, external RTRIM-UP resistor should be connected between TRIM PIN (Pin6) and RTN PIN

(Pin 5). Please refer to Figure 3 for the resistor configuration and Table 1 for the required resistor values in attaining the

desired output adjustment

To DECREASE the output voltages, external RTRIM-DOWN resistor should be connected between TRIM PIN (Pin 6) and VOUT1

(Pin 7). This trim configuration is true for the AF, FG, FY and GM standard versions. Please refer to Figure 4 for the resistor

configuration and Table 1 for the required resistor values in attaining the desired output adjustment. For ALQ15FG48N-6D,

RTRIM-DN resistor is connected between the TRIM PIN and VOUT2 (2.5V output pin).

TABLE 1-A TABLE 1-B

ALQ15AF48 (5V / 3.3V) ALQ15FG48 / ALQ15FY48

∆ [%} RTRIM-UP [kΩ] ∆ [%} RTRIM-DOWN [kΩ] ∆ [%} RTRIM-UP [kΩ] ∆ [%} RTRIM-DOWN [kΩ]

+1 32.45 -1 32.39 +1 12.42 -1 12.58

+2 13.66 -2 15.09 +2 5.26 -2 5.86

+3 7.83 -3 8.95 +3 3.02 -3 3.47

+4 4.99 -4 5.80 +4 1.93 -4 2.25

+5 3.31 -5 3.89 +5 1.28 -5 1.51

+6 2.20 -6 2.60 +6 0.85 -6 1.01

+7 1.41 -7 1.67 +7 0.55 -7 0.65

+8 0.82 -8 0.98 +8 0.32 -8 0.38

+9 0.36 -9 0.44 +9 0.14 -9 0.17

+10 0.00 -10 0.00 +10 0.00 -10 0.00

Figure 3. External Trim resistor setup to increase output for

all versions.

Figure 4. External Trim resistor setup to decrease output for

AF; FG; FY and GM standard versions only.

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 10 OF 19

JANUARY 24, 2003 - REVISION B

Basic Operation and Features (continued)

TABLE 1-C TABLE 1-D

ALQ15GM48 (2.5V / 1.5V) ALQ15FG48N-6D*

∆ [%} RTRIM-UP [kΩ] ∆ [%} RTRIM-DOWN [kΩ] ∆ [%} RTRIM-UP [kΩ] ∆ [%} RTRIM-DOWN [kΩ]

+1 70.46 -1 70.31 +1 46.84 -1 66.47

+2 29.65 -2 32.75 +2 20.82 -2 27.32

+3 17.00 -3 19.42 +3 12.14 -3 15.55

+4 10.83 -4 12.58 +4 7.81 -4 9.87

+5 7.18 -5 8.43 +5 5.20 -5 6.53

+6 4.77 -6 5.64 +6 3.47 -6 4.34

+7 3.06 -7 3.63 +7 2.23 -7 2.78

+8 1.78 -8 2.12 +8 1.30 -8 1.62

+9 0.79 -9 0.94 +9 0.58 -9 0.72

+10 0.00 -10 0.00 +10 0.00 -10 0.00

* DI/DT’s QD48T025033 Trim Equivalent

ALQ15 standard trim utilizes approximately similar range of trim resistors for both RTRIM-UP and RTRIM-DOWN to adjust

the outputs. This facilitates ease of resistor selection and contributes to a decreased number of parts for customer inventory if

the TRIM pin is being utilized.

OUTPUT ENABLE

The ALQ15 comes with an Enable pin (PIN 2), which is primarily used to turn ON/OFF the converter. Both a Positive (no part

number suffix required) and a Negative (suffix “N” required) Enable Logic options are being offered. Please refer to Table 2

for the Part Numbering Scheme.

For Positive Enable, the converter is turned on when the Enable pin is at logic HIGH or left open. The unit turns off when the

Enable pin is at logic LOW or directly connected to -VIN. On the other hand, the Negative Enable version turns on when the

Enable pin is at logic LOW or directly connected to -VIN. The unit turns off when the Enable pin is at Logic HIGH.

OUTPUT OVER VOLTAGE PROTECTION (OVP)

The Over Voltage Protection circuit will shut down the entire converter if any of the two output voltages exceeds the OVP

threshold limits. The converter will automatically recover once the fault is removed.

OVER CURRENT PROTECTION (OCP)

The Over Current Protection circuit will shutdown the converter if any of the load current of either output reaches the OCP

threshold limits. The unit will automatically recover once the over current condition is removed. See Figure 12 for typical

output characteristic under an over current condition.

OVER TEMPERATURE PROTECTION (OTP)

The Over Temperature Protection circuit will shutdown the converter once the sensed location reaches the OTP range. This

feature prevents the unit from overheating and consequently going into thermal runaway, which may further damage the

converter and the end system. Such overheating may be an effect of operation outside the given power thermal derating

conditions. Restart is possible once the temperature of the sensed location drops to less than 110°C.

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 11 OF 19

JANUARY 24, 2003 - REVISION B

Performance Curves

ALQ15FG48

3.3V/2.5V Efficiency @ PO1 = PO2

50

55

60

65

70

75

80

85

90

5 1015202530354045505560

TOTAL OUTPUT POWER [W]

EFFICIENCY (

%

36Vin

48Vin

75Vin

3.3V/2.5V Efficiency @ Balanced Current

55

60

65

70

75

80

85

90

0246810

LOAD CURRENT IO1 = IO2 [A]

EFFICIENCY (

%

36Vin

48Vin

75Vin

Figure 5. Efficiency at balanced power (PO1 = PO2) fo

r

various input voltages; taken at TA=25ºC with the

converter mounted vertically and with 200LFM airflo

w

directed from Pin 3 to Pin 1.

Figure 6. Efficiency curve for balanced output curren

t

(IO1 = IO2) at various input voltages; taken at TA=25ºC

with the converter mounted vertically and with 200LFM

airflow directed from Pin 3 to Pin 1.

Figure 7. Start-up characteristic of Vo1 (CH1) and Vo2

(CH2) at balanced load current; VIN = 48V.

Figure 8. Typical output current waveform under an Ove

r

Current Condition. Output current scale at 0.5A/ mV.

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 12 OF 19

JANUARY 24, 2003 - REVISION B

Performance Curves (continued)

ALQ15AF48 (5.0V / 3.3V) SERIES

5V/3.3V Efficie ncy @ PO1 = PO2

50

55

60

65

70

75

80

85

90

95

5 1015202530354045505560

TOTAL OUTPUT POWER [W]

EFFICIENCY (

%

36Vin

48Vin

75Vin

5V/3.3V Efficiency @ Balanced Current

60

65

70

75

80

85

90

95

01234567

LOAD CURRENT IO1 = IO2 [A]

EFFICIENCY (

%

36Vin

48Vin

75Vin

ALQ15FY48 (3.3V / 1.8V) SERIES

3.3V/1.8V Efficiency @ PO1 = PO2

50

55

60

65

70

75

80

85

90

5 1015202530354045505560

TOTAL OUTPUT POWER [W]

EFFICIENCY (

%

36Vin

48Vin

75Vin

3.3V/1.8V Efficiency @ Balanced Current

55

60

65

70

75

80

85

90

024681012

LOAD CURRENT IO1 = IO2 [A]

EFFICIENCY (

%

36Vin

48Vin

75Vin

Figure 9. Efficiency at balanced power (PO1 = PO2) fo

r

various input voltages; taken at TA=25ºC with the

converter mounted vertically and with 100LFM airflo

w

directed from Pin 3 to Pin 1.

Figure 10. Efficiency curve for balanced out

p

ut curren

t

(IO1 = IO2) at various input voltages; taken at TA=25ºC

with the converter mounted vertically and with 100LFM

airflow directed from Pin 3 to Pin 1.

Figure 11. Efficiency at balanced power (PO1 = PO2) fo

r

various input voltages; taken at TA=25ºC with the

converter mounted vertically and with 300LFM airflo

w

directed from Pin 3 to Pin 1.

Figure 12. Efficiency curve for balanced output curren

t

(IO1 = IO2) at various input voltages; taken at TA=25ºC

with the converter mounted vertically and with 300LFM

airflow directed from Pin 3 to Pin 1.

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 13 OF 19

JANUARY 24, 2003 - REVISION B

Performance Curves (continued)

ALQ15GM48 (2.5V / 1.5V) SERIES

2.5V/1.5V Efficiency @ PO1 = PO2

50

55

60

65

70

75

80

85

90

5 1015202530354045505560

TOTAL POWER [W]

EFFICIENCY (

%

36Vin

48Vin

75Vin

2.5V/1.5V Efficiency @ Balanced Current

55

60

65

70

75

80

85

90

03691215

LOAD CURRENT IO1 = IO2 [A]

EFFICIENCY (

%

36Vin

48Vin

75Vin

Figure 13. Efficiency at balanced power (PO1 = PO2) fo

r

various input voltages; taken at TA=25ºC with the

converter mounted vertically and with 400LFM airflo

w

directed from Pin 3 to Pin 1.

Figure 14. Efficiency curve for balanced output curren

t

(IO1 = IO2) at various input voltages; taken at TA=25ºC

with the converter mounted vertically and with 400LFM

airflow directed from Pin 3 to Pin 1.

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 14 OF 19

JANUARY 24, 2003 - REVISION B

Performance Curves (continued)

CURRENT VS. TEMPERATURE CURVES

Output Power VS Ambient Temperature (5V/3.3V)

0

10

20

30

40

50

60

70

5 1525354555657585

Ambient Temperature (oC)

Total Power (W)

0 LFM

100 LFM

200 LFM

300 LFM

400 LFM

Output Power VS. Ambient Temperature (3.3V/2.5V)

0

10

20

30

40

50

60

70

5 1525354555657585

Ambient Temperature (oC)

Total Power (W)

0 LFM

100 LFM

200 LFM

300 LFM

400 LFM

500 LFM

600 LFM

Figure 15. Total Output Power (balanced load:

IO1 = IO2) vs. Ambient Temperature Curves for

ALQ15AF48 version taken at various airflow

conditions (converter mounted horizontally with

airflow direction from PIN 3 to PIN1; VIN = 48V

nominal).

Figure 16. Total Output Power (balanced load:

IO1 = IO2) vs. Ambient Temperature Curves for

ALQ15FG48 version taken at various airflow

conditions (converter mounted horizontally with

airflow direction from PIN 3 to PIN1; VIN = 48V

nominal).

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 15 OF 19

JANUARY 24, 2003 - REVISION B

Performance Curves (continued)

CURRENT VS. TEMPERATURE CURVES

Output Power VS. Ambient Temperature (3.3V/1.8V)

0

10

20

30

40

50

60

70

5 1525354555657585

Ambient Temperature (oC)

Total Power (W)

0 LFM

100 LFM

200 LFM

300 LFM

400 LFM

500 LFM

600 LFM

Output Pow er VS. Ambient Temperature (2.5V/1.5V)

0

10

20

30

40

50

60

70

5 1525354555657585

Ambient Temperature (oC)

Total Power (W)

0 LFM

100 LFM

200 LFM

300 LFM

400 LFM

500 LFM

600 LFM

Figure 17. Total Output Power (balanced load:

IO1 = IO2) vs. Ambient Temperature Curves for

ALQ15FY48 version taken at various airflow

conditions (converter mounted horizontally with

airflow direction from PIN 3 to PIN1; VIN = 48V

nominal).

Figure 18. Total Output Power (balanced load:

IO1 = IO2) vs. Ambient Temperature Curves for

ALQ15GM48 version taken at various airflow

conditions (converter mounted horizontally with

airflow direction from PIN 3 to PIN1; VIN = 48V

nominal).

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 16 OF 19

JANUARY 24, 2003 - REVISION B

Young’s Stability Curves

ALQ15 3.3 volt channel

100 1 .1031.1041.105

1.10 3

0.01

0.1

1

Impedance magnitude ohms

100 1 .1031.1041.105

100

0

100

frequency Hz

Phase angle deg

ALQ15 2v5 volt channel

100 1 .1031.1041.105

1.10 4

1.10 3

0.01

0.1

1

frequency Hz

Impedance magnitude ohms

100 1 .1031.1041.105

100

0

100

frequency Hz

Phase deg

_______15°

_______30°

_______45°

_______60°

_______75°

_______90°

Figure 19. YSC Plots of 3V3 and 2V5 Output Channels.

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 17 OF 19

JANUARY 24, 2003 - REVISION B

Young’s Stability Curves (continued)

ALQ15 1v8 volt channel

100 1 .1031.1041.105

1.10 3

0.01

0.1

1

frequency Hz

Impedance magnitude ohms

100 1 .1031.1041.105

100

0

100

frequency Hz

Pahse deg

100 1 .1031.1041.105

1.10 3

0.01

0.1

1

frequency Hz

Impedance magnitude ohms

ALQ15 1v5 volt channel

100 1 .1031.1041.105

100

0

100

frequency Hz

Phase deg

_______15°

_______30°

_______45°

_______60°

_______75°

_______90°

Figure 20. YSC Plots of 1V8 and 1V5 Output Channels.

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 18 OF 19

JANUARY 24, 2003 - REVISION B

Mechanical Specifications

Parameter Device Symbol Min Typ Max Unit

Dimension All L - 2.30 [58.4] - in [ mm ]

W - 1.48 [37.6] - in [ mm ]

H - 0.50 [12.6] - in [ mm ]

Weight - TBD g [oz]

PIN ASSIGNMENT

1 +VIN 5 -VOUT / RTN

2 ENABLE 6 TRIM

3 -VIN 7 +VOUT1

4 +VOUT2

NOTE: Pin diameters at ∅ = 0.04" [ 1.02 mm] nominal.

PIN SIDE DOWN

[1.02Ø] TYP.

0.04Ø

7

6

5

4

2

3

1

PIN SIDE UP

SIDE VIEW

0.20 [5.0] MIN

[6.0] MAX0.24

C

L

2.30

[58.4]

1.48

[37.6]

0.500

[12.6]

0.15

[3.8]

2.00

[50.8]

0.38

[9.53] 0.38

[9.53]

0.125

[3.18]

0.125

[3.18]

0.350

[8.89]

0.350

[8.89]

0.740

[18.80]

Figure 21. ALQ15 series mechanical outline ( inches [(mm ]).

Technical Reference Notes

ALQ15XX48X Series

(Open Frame Dual Output Quarter Brick)

MODEL: ALQ15 SERIES SHEET 19 OF 19

JANUARY 24, 2003 - REVISION B

Mechanical Specifications (continued)

SOLDERING CONSIDERATIONS

The ALQ15 series converters are compatible with standard wave soldering techniques. When wave soldering, the

converter pins should be preheated for 20-30 seconds at 110°C and wave soldered at 260°C for less than 10 seconds.

When hand soldering, the iron temperature should be maintained at 425°C and applied to the converter pins for less

than 5 seconds. Longer exposure can cause internal damage to the converter. Cleaning can be performed with cleaning

solvent IPA or with water.

PART NUMBERING SCHEME FOR ORDERING

OUTPUT

VOLTAGE

1

OUTPUT

VOLTAGE

2

ENABLE LOGIC

PIN LENGTH

OPTION

SPECIAL

FEATURE

ALQ15 v w 48 x -y z

A = 5.0V F = 3.3V “Blank” = Positive “Blank” = 5mm (Std) “D” – Special

F = 3.3V G = 2.5V "N" = Negative “-6” = 3.7mm Trim function

F = 3.3V Y = 1.8V

G = 2.5V M = 1.5V

TABLE 2. Part Numbering information.

Please call 1-888-41-ASTEC for further inquiries

or visit us at www.astecpower.com