DC/DC step-down converter
Constant current output: 300mA to 700mA
Wide input voltage: 9 ~ 36VDC
Wide output LED string voltage: 2 ~ 32VDC
High efficiency up to 95%
Built-in EMI filter, comply with EN55015 and FCC part15 without
additional input filter and capacitors
Built-in PWM dimming 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
Compact size
Low cost, high reliability
Suitable for driving illumination LED
3 years warranty
SPECIFICATION
LDD-300L LDD-350L LDD-500L LDD-600L LDD-700L
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
NOTE
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.)
95% at full load and 24VDC/36VDC input for LDD-300~700L/LW ; 95% at full load and 24VDC input for LDD-300~700LS
300mA
5mA
9 ~ 36VDC for LDD-300~700L/LW ; 9~ 32VDC for LDD-300~700LS
2.2uF
40KHz ~ 1000KHz
150mVp-p
±5% at 24VDC input
2 ~ 32VDC for LDD-300~700L/LW ; 2~ 28VDC for LDD-300~700LS
300mA 350mA
150mVp-p
350mA
500mA
150mVp-p
500mA
600mA
200mVp-p
600mA
700mA
200mVp-p
700mA
2000Khrs min. MIL-HDBK-217F (25 )℃
-40 ~ + 85 (Refer to derating curve)℃
20% ~ 90% RH non-condensing for LDD-300~700L/LW ; 20% ~ 85% RH non-condensing for LDD-300~700LS
-55 ~ +125 , 10 ~ 95% RH℃
±℃0.03% /
10 ~ 500Hz, 2G 10min./1 cycle, period for 60min. each along X, Y, Z axes
100℃
22.6*9.9*8.9mm or 0.89"*0.39"*0.35" inch (L*W*H) for LDD-300~700L/LW ; 25.4*10.5*9.3mm or 1"*0.4135"*0.366" inch (L*W*H) for LDD-300~700LS
LDD-300~700L:4g ; LDD-300~700LW:7.3g ; LDD-300~700LS :3.4g
Expoxy(UL94-V0) for LDD-300~700L/LW ; without potted for LDD-300~700LS
1.All parameters are specified at normal input(24VDC), 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: 24VDC input.
4.Output voltage will always step down by 3 volts from input DC voltage.
5.The output of LDD-L should not be connected to the input of the same unit or output from other sources.
Full load Note.3
No load
Capacitor
Leave open if not use
Power ON with dimming: DIM ~ -Vin >3.5 ~ 8VDC or open circuit
Power OFF : DIM ~ -Vin < 0.5VDC or short
100 ~ 1KHz
1mA at PWM dimming OFF and 24VDC input
DC-DC Constant Current Step-Down LED driver LDD-L 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
File Name:LDD-L-SPEC 2015-06-03
LDD-350L Blank : pin style
W
S
: wire style
: SMD style
W
EMC IMMUNITY
EMC EMISSION
DC-DC Constant Current Step-Down LED driver LDD-L series
File Name:LDD-L-SPEC 2015-06-03
DC/DC step-down converter
Constant current output: 1000mA to 1500mA
Wide input voltage: 6 ~ 36VDC
Wide output LED string voltage: 2 ~ 30VDC
High efficiency up to 95%
Built-in EMI filter, comply with EN55015 and FCC part15 without
additional input filter and capacitors
Built-in PWM +analog dimming and remote ON/OFF control
Protections: Short circuit
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- 1000 LSC)
Compact size
Low cost, high reliability
Suitable for driving illumination LED
3 years warranty
SPECIFICATION
LDD-1000L LDD-1200L LDD-1500L
ORDER NO.
CURRENT RANGE
VOLTAGE RANGE Note.4
CURRENT ACCURACY (Typ.)
OUTPUT
EFFICIENCY (max.)
DC CURRENT
INPUT
PWM
DIMMING
&
ON/OFF
CONTROL
ANALOG
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
REMOTE ON / OFF
QUIESCENT INPUT CURRENT
IN SHUTDOWN MODE(max.)
PROTECTION
RIPPLE & NOISE(max.) Note.2
SWITCHING FREQENCY
EXTERNAL CAPACITANCE LOAD (max.)
95% at full load and 24VDC/36VDC input for LDD-1000~1500L/LW
990mA
5mA
6 ~ 36VDC
2.2uF
1000KHz
1.5Vp-p
±5% at 24VDC input
2 ~ 30VDC
1000mA 1200mA
1.5Vp-p
1160mA
1500mA
1.5Vp-p
1450mA
2000Khrs min. MIL-HDBK-217F (25 )℃
-40 ~ + 71 (Refer to derating curve)℃
20% ~ 90% RH non-condensing for LDD-1000~1500L/LW ; 20%~85% RH non-condensing for LDD-1000~1500LS
-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-1000~1500L/LW ; 31.8*20.3*10.9mm or 1.25"*0.8"*0.43" inch (L*W*H) for LDD-1000~1500LS
LDD-1000~1500L:15.6g ; LDD-1000~1500LW:18g ; LDD-1000~1500LS:12.8g
Expoxy(UL94-V0) for LDD-1000~1500L/LW ; without potted for LDD-1000~1500LS
Full load Note.3
No load
Capacitor
Leave open if not use
Power ON with dimming: DIM ~ -Vin >2.6 ~ 5.5VDC or open circuit
Power OFF : DIM ~ -Vin < 0.4VDC or short
100 ~ 500Hz
Leave open if not use
Power ON with dimming : DIM ~ -Vin>0.5~2.5VDC or open circuit
Power OFF : DIM ~ -Vin<0.4VDC or short
1mA at PWM dimming OFF and 24VDC input
■Features :
VOLTAGE RANGE
Regulated at rated output current
Protection type: Can be continued, recovers automatically after fault condition is removed
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(24VDC), 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: 36VDC input.
4.Output voltage will always step down by 3 volts from input DC voltage.
5.The output of LDD-L should not be connected to the input of the same unit or output from other sources.
NOTE
EMC IMMUNITY
EMC EMISSION
LDD-1000L Blank : pin style
W : wire style
S : SMD style
W
BOTTOM
VIEW
BOTTOM
VIEW
1
1
3
3
4
4
56
7.62 [0.30]
3.81 [ 0.15 ]
ψ0.60
2.54 [0.10]
9.9 [0.39]
SIDE
VIEW
SIDE
VIEW
8.9 [0.35]
17.78 [0.7]
22.6 [0.89]
Pin No.
Pin No.
Pin No.
1
1
7,8
9,10
4
16
5
others
6
3
14
1
3
4
5
6
Output
Output
Output
+Vin
+Vin
+Vout
-Vout
-Vin
-Vin
-Vout
N.C
+Vout
PWM DIM
PWM DIM
+Vin
(Red)
PWM DIM
(White)
-Vin
(Black)
-Vout
(Blue)
+Vout
(Yellow)
Comment
Comment
Comment
DC Supply
DC Supply
LED + Connection
LED - Connection
Don't connect to -Vout
Don't connect to -Vout
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)
DC Supply
ON/OFF and PWM Dimming
(Leave open if not used)
Don't connect to -Vout
LED - Connection
LED + Connection
Mechanical Specification Pin Configuration
9.9 [0.39]
52mm
±
5
6100 10mm±
8.9 [0.35]
4
5
22.6[0.89]
Unit: mm (inch)
Blank type(LDD
-
-
-
300~700L):
300~700LW):
300~700LS):
W type(LDD
S type(LDD
NOTE: Pin tolerance 0.05mm±
NOTE: All wires UL3385 22AWG
DC-DC Constant Current Step-Down LED driver LDD-L series
10.50 [0.41]
17.78 [0.70]
0.6 [0.023] 2.54 [0.10]
25.4 [1.00] 12.8 [0.50]
9.3 [0.36]
8
16 9
BOTTOM VIEW
SIDE VIEW
14 10
7
0.25 [0.01]
0.65 [0.02]
A
A
1
File Name:LDD-L-SPEC 2015-06-03
2.54mm
2.54mm
1.54[0.06]
14.63[0.58]
13.1[0.52]
1.54[0.06]
TOP VIEW
178
2.54[0.1]
9
10
14
16
Recommended PCB layout (for LDD-300~700LS)
11
2
21
14
21
23
11
2
BOTTOM
VIEW
Blank type(LDD
-
-
-
1000~1500L):
1000~1500LW):
1000~1500LS):
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]
ψ0.60
NOTE: All wires UL3385 22AWG
Mechanical Specification
Unit: mm (inch)
Pin Configuration
14
13 12
11
23
24
21
2
1
BOTTOM
VIEW
SIDE
VIEW
SIDE
VIEW
100 10mm±52mm±
12.2
[0.48]
31.8 [1.25]
NOTE: Pin tolerance 0.05mm±
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
Recommended PCB layout (for LDD-1000~1500LS)
20.3 [0.80]
15.24 [0.60] 12.2 [0.48]
20.3 [0.80]
3.81 [0.15]
2.54 [0.1]
2.06 [0.08]
31.8 [1.25]
Pin No.
Pin No.
Pin No.
1,2
1,2
11,12
11,12
13,14
13,14
23,24
23,24
others
21
21
2
11
14
21
23
Output
Output
Output
-Vin
-Vin
-Vout
-Vout
+Vout
+Vout
+Vin
+Vin
N.C
DIM
DIM
(Black)
(Blue)
(Yellow)
DIM (White)
(Red)
PWM +analog
PWM +analog
-Vin
-Vout
+Vout
PWM +analog
+Vin
Comment
Comment
Comment
Don't connect to -Vout
Don't connect to -Vout
LED - Connection
LED - Connection
LED + Connection
LED + Connection
DC Supply
DC Supply
No connection
ON/OFF and PWM / analog Dimming
(Leave open if not used)
ON/OFF and PWM / analog Dimming
(Leave open if not used)
Don't connect to -Vout
LED - Connection
LED + Connection
ON/OFF and PWM / analog Dimming
(Leave open if not used)
DC Supply
DC-DC Constant Current Step-Down LED driver LDD-L series
File Name:LDD-L-SPEC 2015-06-03
0%
20%
40%
60%
80%
100%
120%
1500 mA
1200 mA
1000 mA
Analog Dimming Control for 1000~ 1500mA only
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
0
H: > 3.5~8VDC or open circuit
H: > 2.6~5.5VDC or open circuit
300 ~ 700mA :
1000 ~ 1500mA :
L: < 0.5VDC or short
L: < 0.4VDC or short
24Vdc input
Voltage control(0.5~2.5VDC)
+Vin
0.5~2.5VDC
Io Adjustment by DC voltage :
+Vout
-Vin -Vout
1st LED
Last LED
Dimming
LDD-1000~1500L
DC-DC Constant Current Step-Down LED driver LDD-L series
Duty Cycle (%)
0 255075100
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 600~1500mA℃
85 for℃
300~500mA
Peak. Temp 240℃
10 sec. Max.
60 sec. Max.
(>220 )℃
220℃
Time(sec.)
0
50
100
150
Temperature ( )℃
220
240
Reflow Soldering Curve (for LDD-300~1500LS)
PWM Dimming Control (for 300~1500mA)
PWM
Signal
Output
Current
H(5V)
{
{
Max
L(0V)
0
OFF OFF OFF
ON ON
100~1KHz
ON
Remark : The curve applies only to the " Hot Air Reflow Soldering"
PWM Frequency :
300~700mA : 100~ 1KHz
1000~ 1500mA : 100~500Hz
File Name:LDD-L-SPEC 2015-06-03
+Vin
Io Adjustment by PWM signal :
Iout
+Vout
-Vin -Vout
1st LED
Last LED
H
PWM
Dimming
L
LDD-300~1500L
65%
70%
75%
80%
85%
90%
95%
100%
12345678910
300 mA
350 mA
500 mA
600 mA
700 mA
1000 mA
1200 mA
1500 mA
70%
75%
80%
85%
90%
95%
100%
1234567
300 mA
350 mA
500 mA
600 mA
700 mA
1000 mA
1200 mA
1500 mA
70%
75%
80%
85%
90%
95%
100%
123
300 mA
350 mA
500 mA
600 mA
700 mA
1000 mA
1200 mA
1500 mA
DC-DC Constant Current Step-Down LED driver LDD-L 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) Output Voltage(LEDs)
EFFICIENCY (%)
EFFICIENCY (%)
EFFICIENCY (%)
Output Voltage(LEDs)
File Name:LDD-L-SPEC 2015-06-03
