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
1000Khrs 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, EAC TP TC 020
EAC TP TC 004 approved
Compliance to EN61000-4-2,3,4,6,8, light industry level, criteria A, EAC TP TC 020
File Name:LDD-L-SPEC 2018-05-11
LDD-350L Blank : pin style
W
S
: wire style
: SMD style
W
EMC IMMUNITY
EMC EMISSION
SAFETY STANDARDS
