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Mean Well

Mean Well LDB-300LW DC/DC LED Driver CC 300mA - Buck-boost

contant currentbuck-boosthigh efficiency up to 91%wire style
SKU LDB-300LW
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Overview

LDB-300LW is the model of this series: typical efficiency 86%. Type W: W : wire style.

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-300LWSpecifications from the official datasheet (2024-08-02 edition)

OUTPUT

CURRENT RANGE
300mA
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
86%
EFFICIENCY (max.) 24VDC
90%
DC CURRENT Full load 12VDC
930mA
DC CURRENT Full load 24VDC
450mA
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)

MODEL ENCODING

Blank
Blank : pin style
W (this model)
W : wire style
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-300LW Mechanical Specification
Mechanical Specification
LDB-300LW Derating Curve
Derating Curve
LDB-300LW Safe Operating Area
Safe Operating Area
LDB-300LW PWM Dimming Control
PWM Dimming Control
LDB-300LW Efficiency VS Output Voltage(Number
Efficiency VS Output Voltage(Number
LDB-300LW Packing
Packing
LDB-300LW Standard Tube Packing
Standard Tube Packing

Downloads

FAQ

Can I use the LDB-300LW for outdoor LED downlights?

It can be used for LED downlight modules that require a 300mA constant current driver and fit within the 2-40V output range. Its IP67 waterproof rating supports outdoor or moisture-prone environments when the rest of the fixture is also rated appropriately.

Is the LDB-300LW suitable for weather-exposed signage modules?

Yes, this model is rated IP67 Waterproof and is intended for constant current LED loads. For signage modules, the key is that the module must match the 300mA constant current output rather than expect constant voltage power.

Can the LDB-300LW run a small LED array from a variable low-voltage source?

Yes, the buck-boost design supports the listed 9-36VDC input range, which helps when the source voltage varies within that span. The driver delivers 300mA constant current into a 2-40V LED load.

Is this a good choice for compact LED assemblies in damp or cold environments?

It is better suited than indoor-only drivers because it carries an IP67 rating and an operating temperature range of -40°C to +70°C (refer to the derating curve). Those limits make it useful for compact constant current LED assemblies exposed to cold, moisture, or changing weather.

How do I size an LED load for the LDB-300LW?

This is a constant current 300mA driver, so it should be paired with LED loads designed for constant current operation rather than constant voltage. The CC output voltage range is 2-40V, and the number of LEDs depends on the forward voltage of each LED.

What is the difference between the LDB-300LW and the other LDB models?

In the LDB-L series, LDB-300L is 300mA, 2-40V; LDB-350L and LDB-350LW are 350mA, 2-40V; LDB-500L and LDB-500LW are 500mA, 2-32V; and LDB-600L and LDB-600LW are 600mA, 2-30V. The LDB-300LW itself is the wire style version of the 300mA, 2-40V option.

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Mean Well LDB-300LW DC/DC LED Driver CC 300mA - Buck-boost
Mean Well

Mean Well LDB-300LW DC/DC LED Driver CC 300mA - Buck-boost

Log in to see price

LDB-300LW is the model of this series: typical efficiency 86%. Type W: W : wire style.

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
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