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Mean Well

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

contant currentbuck-boosthigh efficiency up to 91%pin style
SKU LDB-300L
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Overview

LDB-300L is the model of this series: typical efficiency 86%. Type Blank: Blank : pin 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-300LSpecifications 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 (this model)
Blank : pin style
W
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-300L Mechanical Specification
Mechanical Specification
LDB-300L Derating Curve
Derating Curve
LDB-300L Safe Operating Area
Safe Operating Area
LDB-300L PWM Dimming Control
PWM Dimming Control
LDB-300L Efficiency VS Output Voltage(Number
Efficiency VS Output Voltage(Number
LDB-300L Packing
Packing
LDB-300L Standard Tube Packing
Standard Tube Packing

Downloads

FAQ

Can I use the LDB-300L for a compact LED downlight module?

Yes, this is a 300mA constant current buck-boost LED driver intended for LED loads such as compact downlight modules, provided the load fits its electrical range. It supports a 2-40V CC output range from a 9-36VDC input.

Is the LDB-300L suitable for small waterproof signage modules?

Yes, its IP67 waterproof rating makes it appropriate for wet or exposed environments where the LED module itself also matches the driver requirements. Because it is a constant current model, it should be used with constant current signage modules rather than constant voltage LED products.

Can the LDB-300L power a small LED array in outdoor conditions?

It can be used for a small LED array when the array requires 300mA constant current and falls within the 2-40V range. The IP67 rating and -40°C to +70°C operating range (refer to the derating curve) make it better suited to harsh environments than indoor-only drivers.

Would the LDB-300L fit low-power LED projects where input voltage may vary?

Yes, the buck-boost design is intended for applications where the source varies within the listed 9-36VDC input range. With 300mA output and efficiency up to 90% (at 24VDC input), it is aimed at compact low-power constant current LED use.

How do I determine if my LEDs are compatible with the LDB-300L?

This driver provides constant current at 300mA, not constant voltage, so the LED load must match that operating mode. The CC output voltage range is 2-40V, and the number of LEDs depends on the forward voltage of each LED rather than a single fixed count.

How does the LDB-300L compare with the other LDB series versions?

In the LDB-L series, LDB-300LW matches this model at 300mA and 2-40V; LDB-350L and LDB-350LW are 350mA and 2-40V; LDB-500L and LDB-500LW are 500mA and 2-32V; and LDB-600L and LDB-600LW are 600mA and 2-30V. The LDB-300L is the pin style version in the 300mA part of the range.

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

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

Log in to see price

LDB-300L is the model of this series: typical efficiency 86%. Type Blank: Blank : pin 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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