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Mean Well

Mean Well LDB-350LW DC/DC LED Driver CC 350mA - Buck-boost

contant currentbuck-boosthigh efficiency up to 91%wire style
SKU LDB-350LW
$13.38 USD
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Available to order
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Overview

LDB-350LW is the model of this series: typical efficiency 89%.

Features

  • DC/DC buck-boost converter
  • Constant current output: 300mA to 600mA
  • Wide input voltage: 9 ~ 36VDC
  • Wide output LED string voltage: 2 ~ 40VDC
  • High efficiency up to 91%
  • Comply with BS EN/EN55015 and FCC part15
  • Built-in PWM and remote ON/OFF control
  • Protections: Short circuit / Over temperature
  • Cooling by free air convection
  • Fully encapsulated with IP67 level
  • Compact size
  • High reliability
  • Suitable for driving illumination LED
  • 3 years warranty

Specifications

LDB-350LWSpecifications from the official datasheet (2024-08-02 edition)

OUTPUT

CURRENT RANGE
350mA
VOLTAGE RANGENote.4
2 ~ 40VDC
CURRENT ACCURACY (Typ.)
±5%
RIPPLE & NOISE(max.)Note.2
150mVp-p
SWITCHING FREQENCY
1000KHz
NO LOAD OUTPUT VOLTAGE
75VDC

INPUT

VOLTAGE RANGENote.4
9 ~ 36VDC
EFFICIENCY (max.) 12VDC
89%
EFFICIENCY (max.) 24VDC
91%
DC CURRENT Full load 12VDC
1100mA
DC CURRENT Full load 24VDC
520mA
DC CURRENT No load
2mA (Vin 24VDC)
FILTER
Capacitor

PWM DIMMING & ON/OFF CONTROL

REMOTE ON/OFF
Leave open if not use Power ON with dimming: DIM ~ -Vin >2 ~ 10VDC or open circuit Power OFF : DIM ~ -Vin < 0.5VDC or short
PWM FREQUENCY
100 ~ 1KHz
MAX. PWM SIGNAL CURRENT
1mA

PROTECTION

SHORT CIRCUIT
Regulated at rated output current Protection type: Can be continued, recovers automatically after fault condition is removed
OVER TEMPERATURE
Tj 145℃ typically(IC1) detect on main control IC Protection type : Shut down, recovers automatically after temperature goes down

ENVIRONMENT

WORKING TEMP.
-40 ~ + 70℃(Refer to derating curve)
WORKING HUMIDITY
20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY
-55 ~ +125℃, 10 ~ 95% RH
TEMP. COEFFICIENT
±0.03% / ℃
VIBRATION
10 ~ 500Hz, 2G 10min./1 cycle, period for 60min. each along X, Y, Z axes
OPERATING CASE TEMP. (max.)
115℃

EMC

SAFETY STANDARDS
EAC TP TC 020/2011 approved
EMC EMISSION
Compliance to BS EN/EN55015, FCC part 15 class B, EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61000-4-2,3,4,6,8, light industry level, criteria A, EAC TP TC 020

OTHERS

MTBF
350Khrs min. MIL-HDBK-217F (25℃)
DIMENSION
31.8*20.3*12.2mm or 1.25"*0.8"*0.48" inch (L*W*H)
WEIGHT
LDB-L:15.6g(15pcs/Tube) ; LDB-LW:18g(20pcs/Box), Please order Base on MPQ
POTTING MATERIAL
Expoxy(UL94-V0)
Test conditions and notes4
  1. 1.All parameters are specified at normal input(24VDC), rated load, 25℃ 70% RH ambient.
  2. 2.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1uf capacitor.
  3. 3.The output of LDB-L should not be connected to the input of the same unit or output from other sources.
  4. 4. If input voltage is 36V then the output voltage operating range had better <38V.

Technical drawings

LDB-350LW Mechanical Specification
Mechanical Specification
LDB-350LW Derating Curve
Derating Curve
LDB-350LW Safe Operating Area
Safe Operating Area
LDB-350LW PWM Dimming Control
PWM Dimming Control
LDB-350LW Efficiency VS Output Voltage(Number
Efficiency VS Output Voltage(Number
LDB-350LW Packing
Packing
LDB-350LW Standard Tube Packing
Standard Tube Packing

Downloads

FAQ

Can I use the LDB-350LW for a 350mA LED downlight module?

Yes, this model is a constant current LED driver with a 350mA output, so it fits LED downlights designed for 350mA drive current. The LED load also needs to stay within the 2-40V constant current range.

Is the LDB-350LW suitable for LED signage modules?

It can be used for signage modules or small LED arrays when the load is designed for constant current operation at 350mA. It is not a constant voltage driver, so it should be matched to LED modules that specify 350mA and stay within the 2-40V CC range.

Can this driver run a small custom LED array?

Yes, if the array is a constant current load rated for 350mA and its total forward voltage falls within 2-40V. The usable output voltage depends on input (up to 27V at 9V input, 36V at 12V), so check the safe operating area.

How do I know if the LDB-350LW is compatible with my LEDs?

Match the LEDs by current first: this driver outputs 350mA constant current, not constant voltage. The LED string must operate within the 2-40V CC output range, and the number of LEDs depends on the forward voltage of each LED rather than a fixed LED count.

Is the LDB-350LW appropriate for wet or outdoor conditions?

The unit is rated IP67 Waterproof, so it is built for environments where water and dust resistance matter. It is also specified for operation from -40°C to +70°C (refer to the derating curve), which supports demanding outdoor or industrial conditions.

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Mean Well LDB-350LW DC/DC LED Driver CC 350mA - Buck-boost
Mean Well

Mean Well LDB-350LW DC/DC LED Driver CC 350mA - Buck-boost

$13.38 USD

LDB-350LW is the model of this series: typical efficiency 89%.

Features

  • DC/DC buck-boost converter
  • Constant current output: 300mA to 600mA
  • Wide input voltage: 9 ~ 36VDC
  • Wide output LED string voltage: 2 ~ 40VDC
  • High efficiency up to 91%
  • Comply with BS EN/EN55015 and FCC part15
  • Built-in PWM and remote ON/OFF control
  • Protections: Short circuit / Over temperature
  • Cooling by free air convection
  • Fully encapsulated with IP67 level
  • Compact size
  • High reliability
  • Suitable for driving illumination LED
  • 3 years warranty
View product

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