LDD-350H Blank : pin style
W : wire style
S : SMD style
W
File Name:LDD-H-SPEC 2015-06-03
DC/DC step-down converter
Constant current output: 300mA to 1000mA
Wide input voltage: 9 ~ 56VDC
Wide output LED string voltage: 2 ~ 52VDC
High efficiency up to 97%
Built-in EMI filter, comply with EN55015 and FCC part15 without
additional input filter and capacitors
Built-in PWM and remote ON/OFF control
Protections: Short circuit / Over temperature
Cooling by free air convection
Fully encapsulated with IP67 level for pin and wire style
Non-potted, optional conformal coating for SMD style
(Order No.: LDD- 350 HSC)
Compact size
Low cost, high reliability
Suitable for driving illumination LED
3 years warranty
SPECIFICATION
LDD-300H LDD-350H LDD-500H LDD-600H LDD-700H LDD-1000H
ORDER NO.
CURRENT RANGE
VOLTAGE RANGE Note.4
CURRENT ACCURACY (Typ.)
OUTPUT
EFFICIENCY (max.)
DC CURRENT
INPUT
PWM
DIMMING
&
ON/OFF
CONTROL
ENVIRONMENT
EMC
WORKING TEMP.
WORKING HUMIDITY
STORAGE TEMP., HUMIDITY
TEMP. COEFFICIENT
VIBRATION
OPERATING CASE TEMP. (max.)
MTBF
DIMENSION
OTHERS WEIGHT
POTTING MATERIAL
SHORT CIRCUIT
FILTER
REMOTE ON/OFF
PWM FREQUENCY
QUIESCENT INPUT CURRENT
IN SHUTDOWN MODE(max.)
OVER TEMPERATURE
PROTECTION
RIPPLE & NOISE(max.) Note.2
SWITCHING FREQENCY
EXTERNAL CAPACITANCE LOAD (max.)
97% at full load and 36VDC/48VDC input for LDD-H/HW ; 96% at full load and 36VDC/48VDC input for LDD-HS
270mA
5mA
9 ~ 56VDC
2.2uF
40KHz ~ 1000KHz
150mVp-p
±± ±3% at 24VDC input ; 4% at 48VDC input for LDD-H/HW ; 5% for LDD-HS
2 ~ 52VDC
300mA 350mA
150mVp-p
320mA
500mA
150mVp-p
450mA
600mA
200mVp-p
550mA
700mA 1000mA
200mVp-p 350mVp-p
650mA 900mA
2000Khrs min. MIL-HDBK-217F (25 )℃
-40 ~ + 85 (Refer to derating curve)℃
20% ~ 90% RH non-condensing for LDD-H/HW ; 20%~85% RH non-condensing for LDD-HS
-55 ~ +125 , 10 ~ 95% RH℃
±℃0.03% /
10 ~ 500Hz, 2G 10min./1 cycle, period for 60min. each along X, Y, Z axes
100℃
31.8*20.3*12.2mm or 1.25"*0.8"*0.48" inch (L*W*H) for LDD-H/HW ; 31.8*20.3*11.4mm or 1.25"*0.8"*0.45" inch (L*W*H) for LDD-HS
LDD-H:15.6g ; LDD-HW:18g ; LDD-HS:12.8g
Expoxy(UL94-V0) for LDD-H/HW ; without potted for LDD-HS
Full load Note.3
No load
Capacitor
Leave open if not use
Power ON with dimming: DIM ~ -Vin >2.5 ~ 6VDC or open circuit
Power OFF : DIM ~ -Vin < 0.8VDC or short
100 ~ 1KHz
1mA at PWM dimming OFF and 24VDC input
DC-DC Constant Current Step-Down LED driver LDD-H series
■Features :
VOLTAGE RANGE
Tj 150 typically(IC1) detect on main control IC℃
Regulated at rated output current
Protection type: Can be continued, recovers automatically after fault condition is removed
Protection type : Shut down, recovers automatically after temperature goes down
Compliance to EN55015, FCC part 15 class B
Compliance to EN61000-4-2,3,4,6,8, light industry level, criteria A
1.All parameters are specified at normal input(48VDC), rated load, 25 70% RH ambient. ℃
2.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1uf capacitor.
3.Test condition: 48VDC input.
4.Output voltage will always step down by 3 volts from input DC voltage.
5.The output of LDD-H should not be connected to the input of the same unit or output from other sources.
NOTE
EMC IMMUNITY
EMC EMISSION
31.8[1.25]
11
2
21
14
21
23
11
2
BOTTOM
VIEW
Blank type(LDD
-
-
-
-
-
H):
HW):
HS):
W type(LDD
S type(LDD
124
12
13
BOTTOM
VIEW
20.3[0.80]
25.4[1.00]
0.5[0.02]
1.0[0.04]
2.0[0.08]
2.54[0.10]
10.9[0.43]
31.8[1.25]
11.4[0.45]
23
14
21
11
2
0.25[0.010]
1.5[0.059]
2.54mm
2.54mm
2.03[0.08]
26.40[1.04]
24.37[0.96]
1.5[0.06]
2.54[0.1]
TOP VIEW
12 1112
1314212324
ψ0.60
NOTE: All wires UL3385 22AWG
DC-DC Constant Current Step-Down LED driver LDD-H series
Mechanical Specification
Recommended PCB layout (for LDD-HS)
Unit: mm (inch)
Pin Configuration
14
13 12
11
23
24
22
2
1
BOTTOM
VIEW
SIDE
VIEW
SIDE
VIEW
12.2 [0.48]
20.3[0.80] 100 10mm±52mm±
12.2
[0.48]
2.06 [0.08]
3.81 [0.15]
2.5 4 [0.1]
20.3 [0.80]
31.8 [1.25]
15.24 [0.60]
NOTE: Pin tolerance 0.05mm±
Pin No.
Pin No.
Pin No.
23,24
23,24
others
23
1,2
1,2
2(Black)
(Blue)
(Yellow)
(White)
(Red)
11,12
11,12
11
13,14
13,14
14
22
21
21
Output
Output
Output
+Vin
+Vin
N.C
+Vin
-Vin
-Vin
-Vin
-Vout
-Vout
-Vout
+Vout
+Vout
+Vout
PWM DIM
PWM DIM
PWM DIM
Comment
Comment
Comment
DC Supply
DC Supply
No connection
DC Supply
Don't connect
to -Vout
Don't connect
to -Vout
Don't connect
to -Vout
LED - Connection
LED - Connection
LED - Connection
LED + Connection
LED + Connection
LED + Connection
ON/OFF and PWM
Dimming
(Leave open if
not used)
ON/OFF and PWM
Dimming
(Leave open if
not used)
ON/OFF and PWM
Dimming
(Leave open if
not used)
File Name:LDD-H-SPEC 2015-06-03
DC-DC Constant Current Step-Down LED driver LDD-H series
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
100.0%
1234 567891011121314
300 mA
350 mA
500 mA
600 mA
700 mA
1000 mA
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
100.0%
12345678910
300 mA
350 mA
500 mA
600 mA
700 mA
1000 mA
75.0%
80.0%
85.0%
90.0%
95.0%
100.0%
1234567
300 mA
350 mA
500 mA
600 mA
700 mA
1000 mA
80.0%
85.0%
90.0%
95.0%
100.0%
123
300 mA
350 mA
500 mA
600 mA
700 mA
1000 mA
Efficiency VS Output Voltage(Number of LEDs)
Fig-1 12VDC input, 1~3 LEDs(Vf=3V) Fig-2 24VDC input, 1~7 LEDs(Vf=3V)
Fig-3 36VDC input, 1~10 LEDs(Vf=3V)
Output Voltage(LEDs)
EFFICIENCY (%)
EFFICIENCY (%)
EFFICIENCY (%)
80%
85%
90%
95%
100%
123
80%
234567
75%
1
80%
85%
90%
95%
100%
34 5 6 78 9 10
75%
70%
12
70%
65%
75%
4 5 6 7 8 9 10 11 12 13 14132
300mA
350mA
500mA
600mA
700mA
1000mA
300mA
300mA
300mA
350mA
350mA
350mA
500mA
500mA
500mA
600mA
600mA
600mA
700mA
700mA
700mA
1000mA
1000mA
1000mA
Fig-4 48VDC input, 1~14 LEDs(Vf=3V)
Output Voltage(LEDs)
EFFICIENCY (%)
85%
90%
95%
100%
80%
85%
90%
95%
100%
Standard Application
+Vin +Vout
-Vin
H: >2.5~6VDC or open circuit
L: <0.8VDC or short
-Vout
1st LED
Last LED
H
PWM
Dimming LDD-H
L
0 255075100
Duty Cycle (%)
25
50
75
100
◎During PWM dimming operation, the output current will change to
PWM style.
Iout(%)
Tol : 3%(Typ.)±
Derating Curve
Ta ( )℃
LOAD (%)
-40 0 25 50 71 85
50
25
75
100
100
71 for 600~1000mA℃
85 for℃
300~500mA
Peak. Temp 240℃
10 sec. Max.
60 sec. Max.
(>220 )℃
220℃
Time(sec.)
Remark : The curve applies only to the " Hot Air Reflow Soldering"
0
50
100
150
Temperature ( )℃
220
240
Reflow Soldering Curve (for LDD-HS)
PWM Dimming Control
PWM
Signal
Output
Current
H(5V)
Max
L(0V)
0
OFF OFF OFF
ON ON
100~1KHz
ON
File Name:LDD-H-SPEC 2015-06-03
Output Voltage(LEDs) Output Voltage(LEDs)
