DC-DC Constant Current Step-Down LED driver
■
Features :
DC/DC step-down converter
LDD-H
series
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
LDD-350H W
Blank : pin style
W
: wire style
S
: SMD style
LDD-1200H
W
Blank : pin style
W
: wire style
SPECIFICATION
ORDER NO.
CURRENT RANGE
VOLTAGE RANGE
OUTPUT
LDD-300H
300mA
Note.4
2 ~ 52VDC
LDD-350H
350mA
LDD-500H
500mA
LDD-600H
600mA
LDD-700H
700mA
LDD-1000H
1000mA
LDD-1200H
1200mA
2 ~ 46VDC
LDD-1500H
1500mA
CURRENT ACCURACY (Typ.)
±
3% at 24VDC input ;
±
4% at 48VDC input for LDD-H/HW ;
±
5% for LDD-HS
150mVp-p
150mVp-p
200mVp-p
200mVp-p
RIPPLE & NOISE(max.)
Note.2
150mVp-p
40KHz ~ 1000KHz
SWITCHING FREQENCY
EXTERNAL CAPACITANCE LOAD (max.)
2.2uF
VOLTAGE RANGE
9 ~ 56VDC
350mVp-p
350mVp-p
350mVp-p
9 ~ 52VDC
1360mA
INPUT
97% at full load and 36VDC/48VDC input for LDD-H/HW ; 96% at full load and 36VDC/48VDC input for LDD-HS
EFFICIENCY (max.)
320mA
450mA
550mA
650mA
900mA
1100mA
Full load
Note.3
270mA
DC CURRENT
5mA
No load
FILTER
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
Regulated at rated output current
Protection type: Can be continued, recovers automatically after fault condition is removed
Tj 150
℃
typically(IC1) detect on main control IC
Protection type : Shut down, recovers automatically after temperature goes down
-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
PWM
REMOTE ON/OFF
DIMMING
&
PWM FREQUENCY
ON/OFF
CONTROL QUIESCENT INPUT CURRENT
IN SHUTDOWN MODE(max.)
SHORT CIRCUIT
PROTECTION
OVER TEMPERATURE
WORKING TEMP.
WORKING HUMIDITY
STORAGE TEMP., HUMIDITY
ENVIRONMENT
TEMP. COEFFICIENT
VIBRATION
OPERATING CASE TEMP. (max.)
100℃
SAFETY STANDARDS
EAC TP TC 004 approved
EMC
EMC EMISSION
EMC IMMUNITY
MTBF
DIMENSION
OTHERS
WEIGHT
POTTING MATERIAL
NOTE
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
1000Khrs min. MIL-HDBK-217F (25
℃
)
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
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.
File Name:LDD-H-SPEC 2018-05-11
DC-DC Constant Current Step-Down LED driver
Reflow Soldering Curve (for LDD-300~1000HS)
240
220
Peak. Temp 240℃
10 sec. Max.
220℃
LDD-H
Derating Curve
series
Temperature (
℃
)
150
100
50
LOAD (%)
60 sec. Max.
(>220
℃
)
100
75
50
25
71
℃
for 600~1200mA
65
℃
for 1500mA
85
℃
for
300~500mA
0
Time(sec.)
Remark : The curve applies only to the " Hot Air Reflow Soldering"
-40
0
25
50 65 71
85
100
PWM Dimming Control
H(5V)
ON
ON
ON
Ta (
℃
)
◎
During PWM dimming operation, the output current will change to
PWM style.
100
Tol :
±
3%(Typ.)
75
PWM
Signal
L(0V)
OFF
OFF
100~1KHz
OFF
Max
I out(%
)
50
25
Output
Current
0
0
25
50
75
100
Standard Application
+Vin
+Vout
1st LED
Dimming
Duty Cycle (%)
PWM
H
L
LDD-H
Last LED
H: >2.5~6VDC or open circuit
L: <0.8VDC or short
-Vin
-Vout
Efficiency VS Output Voltage(Number of LEDs)
Fig-1
100%
100%
12VDC input, 1~3 LEDs(Vf=3V)
Fig-2
100%
100%
24VDC input, 1~7 LEDs(Vf=3V)
300mA
300mA
350mA
350mA
500mA
500mA
95%
95%
300mA
300mA
350mA
350mA
500mA
500mA
600mA
600mA
700mA
700mA
95%
95%
600mA
600mA
700mA
700mA
1000mA
1000mA
1200mA
1200mA
1500mA
1500mA
EFFICIENCY (%)
EFFICIENCY (%)
90%
90%
90%
90%
1000mA
1000mA
1200mA
1200mA
1500mA
1500mA
85%
85%
85%
85%
80%
80%
80%
80%
75%
75%
1
1
2
3
1
1
2
2
3
3
4
4
5
5
6
6
7
7
Output Voltage(LEDs)
Fig-3
100%
100%
Output Voltage(LEDs)
Fig-4
300mA
300mA
350mA
350mA
500mA
500mA
36VDC input, 1~10 LEDs(Vf=3V)
48VDC input, 1~14 LEDs(Vf=3V)
300mA
300mA
350mA
350mA
500mA
500mA
600mA
600mA
700mA
700mA
1000mA
1000mA
1200mA
1200mA
1500mA
1500mA
100%
100%
95%
95%
95%
95%
600mA
600mA
700mA
700mA
1000mA
1000mA
90%
90%
EFFICIENCY (%)
1500mA
1500mA
85%
85%
EFFICIENCY (%)
90%
90%
1200mA
1200mA
85%
85%
80%
80%
75%
75%
80%
80%
75%
75%
70%
70%
70%
70%
1
1
2
2
3
65%
65%
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10 11 12 13 14
10
11
12
13
14
Output Voltage(LEDs)
Output Voltage(LEDs)
File Name:LDD-H-SPEC 2018-05-11
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