LDD-350H LDD-1200HBlank : pin style Blank : pin style
W : wire style W : wire style
S : SMD style
W
W
File Name:LDD-H-SPEC 2018-05-11
DC/DC step-down converter
Constant current output: 300mA to 1500mA
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- 350-1000 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 LDD-1200H LDD-1500H
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 1200mA 1500mA
200mVp-p 350mVp-p 350mVp-p
2 ~ 46VDC
350mVp-p
650mA 900mA 1100mA
9 ~ 52VDC
1360mA
1000Khrs 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, EAC TP TC 020
Compliance to EN61000-4-2,3,4,6,8, light industry level, criteria A, EAC TP TC 020
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
EAC TP TC 004 approved
SAFETY STANDARDS
31.8[1.25]
11
2
21
14
21
23
11
2
BOTTOM
VIEW
◎Blank type(LDD
◎Blank type(LDD
-
-
-
300~1000H):
1200~1500H):
300~1500HW):
◎W type(LDD
ψ0.60
ψ0.60
NOTE: All wires UL3385 22AWG
DC-DC Constant Current Step-Down LED driver LDD-H series
Mechanical Specification
Unit: mm (inch)
Pin Configuration
14
14
13
13
12
12
11
11
23
23
24
24
22
21
2
2
1
1
BOTTOM
VIEW
BOTTOM
VIEW
SIDE
VIEW
SIDE
VIEW
SIDE
VIEW
12.2 [0.48]
12.2 [0.48]
20.3[0.80] 100 10mm±52mm±
12.2
[0.48]
2.06 [0.08]
2.06 [0.08]
3.81 [0.15]
3.81 [0.15]
2.5 4 [0.1]
2.5 4 [0.1]
20.3 [0.80]
20.3 [0.80]
31.8 [1.25]
31.8 [1.25]
15.24 [0.60]
15.24 [0.60]
NOTE: Pin tolerance 0.05mm±
NOTE: Pin tolerance 0.05mm±
Pin No.
Pin No.
Pin No.
23,24
23,24
others
others
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
+Vin
+Vin
N.C
N.C
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
No connection
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 2018-05-11
DC-DC Constant Current Step-Down LED driver LDD-H series
File Name:LDD-H-SPEC 2018-05-11
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
Pin No.
23,24
others
1,2
11,12
13,14
21
+Vin
N.C
-Vin
-Vout
+Vout
PWM DIM
Comment
DC Supply
No connection
Don't connect
to -Vout
LED - Connection
LED + Connection
ON/OFF and PWM
Dimming
(Leave open if
not used)
Recommended PCB layout (for LDD-300~1000HS)
-
300~1000HS):
◎S type(LDD
65%
70%
75%
80%
85%
90%
95%
100%
123456 7891011121314
300 mA
350 mA
500 mA
600 mA
700 mA
1000 mA
1200 mA
1500 mA
70%
75%
80%
85%
90%
95%
100%
12345678910
300 mA
350 mA
500 mA
600 mA
700 mA
1000 mA
1200 mA
1500 mA
75%
80%
85%
90%
95%
100%
1234567
300 mA
350 mA
500 mA
600 mA
700 mA
1000 mA
1200mA
1500mA
80%
85%
90%
95%
100%
123
300 mA
350 mA
500 mA
600 mA
700 mA
1000 mA
1200mA
1500mA
DC-DC Constant Current Step-Down LED driver LDD-H series
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
1200mA
1500mA
300mA
300mA
350mA
350mA
500mA
500mA
600mA
600mA
700mA
700mA
1000mA
1200mA
1500mA
1000mA
1200mA
1500mA
300mA
350mA
500mA
600mA
700mA
1000mA
1200mA
1500mA
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 7165 85
50
25
75
100
100
71 for 600~1200mA℃
65 for 1500mA℃
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-300~1000HS)
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 2018-05-11
Output Voltage(LEDs) Output Voltage(LEDs)
