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Mean Well

Mean Well LDH-45B-500DA DC/DC LED Driver CC 500mA - Step-up

constant currentstep uphigh efficiency up to 95%pin style
SKU LDH-45B-500DA
$19.84 USD
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Overview

LDH-45B-500DA is the model of this series: rated current 500mA, rated power 43W, typical efficiency 94%. Type DA: PIN style, DALI dimming.

Features

  • DC/DC step-up converter
  • Constant current output : 350mA to 1050mA
  • Wide output LED string voltage up to 126VDC
  • High efficiency up to 95%
  • DALI dimming [(Blank)DA type or WDA type]
  • Protections: Short circuit / Over voltage / Under voltage
  • Cooling by free air convection
  • Fully encapsulated
  • 3 years warranty

Specifications

LDH-45B-500DASpecifications from the official datasheet (2024-10-16 edition)

OUTPUT

RATED CURRENT
500mA
CURRENT ACCURACY(Typ.)
±5% at 24VDC input
VOLTAGE RANGE DALINote.2
36~86VDC
NO LOAD OUTPUT VOLTAGE(max.)
100V
RATED POWER
43W
RIPPLE & NOISE (max.)Note.3
1.7Vp-p

INPUT

RATED VOLTAGE
24VDC
VOLTAGE RANGENote.2
18~32VDC
EFFICIENCY (max.)
94%
DC CURRENT (Typ.)
2.1A

ANALOG DIMMING & ON/OFF CONTROL

DIM INPUT VOLTAGE RANGE
0.25~1.3VDC
MAX OPERATION VOLTAGE
8V; The output current remains constant when voltage changes from 1.3V to 8V

PROTECTION

SHORT CIRCUIT
Protection type : Power OFF and fuse open
OVER VOLTAGE (max.)
100V Protection type : Constant output voltage and shut off o/p current, recovers automatically after fault condition is removed

ENVIRONMENT

WORKING TEMP.
-40 ~ +70℃ (Refer to "Derating Curve")
WORKING HUMIDITY
20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY
-40 ~ +85℃, 10 ~ 95% RH
TEMP. COEFFICIENT
±0.03%/℃ (0 ~ 50℃)
VIBRATION
10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes
SOLDERING TEMPERATURE
Wave soldering: 265℃,5s (max.); Manual soldering: 390℃,3s (max.)

SAFETY & EMC

SAFETY STANDARDS
LVD BS EN/EN61347-1, BS EN/EN61347-2-13,EAC TP TC 004 approved
EMC EMISSION
Compliance to BS EN/EN55015;EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61547,BS EN/EN61000-4-2,3,4,6,8; light industry level;EAC TP TC 020

OTHERS

MTBF
12195.2K hrs min. Telcordia SR-332 (Bellcore) ; 1179.3K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
75*53*22.7mm (L*W*H)
PACKING
138g;100pcs/14.8Kg/0.83CUFT[(Blank) DA type]

MODEL ENCODING

A
9~18VDC input range
B
18~32VDC input range
Blank
PIN style, PWM+analog dimming
W
Wire style, PWM+analog dimming
DA (this model)
PIN style, DALI dimming
WDA
Wire style, DALI dimming
Test conditions and notes3
  1. 1. All parameters are specified at normal input(12VDC,24VDC), rated load, 25℃ 70% RH ambient.
  2. 2. (Blank)DA type output voltage must step up by 12 Volts from input DC voltage.
  3. 3. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf parallel capacitor.

Technical drawings

LDH-45B-500DA Mechanical Specification
Mechanical Specification
LDH-45B-500DA Standard Application
Standard Application
LDH-45B-500DA Efficiency VS Output Voltage(Number
Efficiency VS Output Voltage(Number
LDH-45B-500DA Application Notes of EMC
Application Notes of EMC

Downloads

FAQ

Can the LDH-45B-500DA be used for a 500mA constant current LED downlight array?

Yes, if the downlight array is designed for 500mA constant current operation. The full LED load must fall within the 36-86V CC output range and stay within the 43W maximum power.

Is this driver a fit for 500mA LED signage modules?

It can be a fit for constant current signage modules that are specified for 500mA. Because it is a constant current driver and not a constant voltage supply, the LED string's total forward voltage must be within 36-86V.

Can I use this driver with a small LED array that has a higher forward voltage string?

Yes, this step-up constant current model is intended for 500mA LED arrays within a 36-86V output range. That makes it better suited to higher-voltage 500mA arrays than lower-range CC drivers.

Is the LDH-45B-500DA suitable for outdoor or sealed fixture environments?

The datasheet does not list an IP or waterproof rating, so outdoors it must be mounted in a sealed fixture that keeps out water and dust. Its operating temperature range is -40°C to +70°C (refer to the derating curve), at 20-90% RH non-condensing humidity.

What should I check to confirm LED compatibility?

Confirm that the LED load needs 500mA constant current and that its total forward voltage falls within the 36-86V CC range. The number of LEDs depends on each LED's forward voltage, so there is no single fixed LED quantity for this driver.

What are the key differences in the LDH-45B-500 family?

LDH-45B-500 and LDH-45B-500W are both 500mA, 21-86V, 43W models, while LDH-45B-500DA and LDH-45B-500WDA are 500mA, 36-86V, 43W models. The main published differences are the CC voltage range and version suffixes, not the nominal wattage.

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Mean Well LDH-45B-500DA DC/DC LED Driver CC 500mA - Step-up
Mean Well

Mean Well LDH-45B-500DA DC/DC LED Driver CC 500mA - Step-up

$19.84 USD

LDH-45B-500DA is the model of this series: rated current 500mA, rated power 43W, typical efficiency 94%. Type DA: PIN style, DALI dimming.

Features

  • DC/DC step-up converter
  • Constant current output : 350mA to 1050mA
  • Wide output LED string voltage up to 126VDC
  • High efficiency up to 95%
  • DALI dimming [(Blank)DA type or WDA type]
  • Protections: Short circuit / Over voltage / Under voltage
  • Cooling by free air convection
  • Fully encapsulated
  • 3 years warranty
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