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Mean Well

Mean Well LDH-45A-700W DC/DC LED Driver CC 700mA - Step-up

constant currentstep uphigh efficiency up to 95%wire style
SKU LDH-45A-700W
$12.69 USD
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Overview

LDH-45A-700W is the model of this series: rated current 700mA, rated power 44.8W, typical efficiency 90%.

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%
  • PWM + analog dimming and remote ON/OFF control [(Blank) type or W type]
  • 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-45A-700WSpecifications from the official datasheet (2024-10-16 edition)

OUTPUT

RATED CURRENT
700mA
CURRENT ACCURACY(Typ.)
±5% at 12VDC input
VOLTAGE RANGE Non-DALINote.2
12~64VDC
VOLTAGE RANGE DALINote.2
24~64VDC
NO LOAD OUTPUT VOLTAGE(max.)
75V
RATED POWER
44.8W
RIPPLE & NOISE (max.)Note.3
1.9Vp-p

INPUT

RATED VOLTAGE
12VDC
VOLTAGE RANGENote.2
9~18VDC
EFFICIENCY (max.)
90%
DC CURRENT (Typ.)
4.2A

PWM DIMMING & ON/OFF CONTROL

REMOTE ON/OFF
Leave open if not used Power ON with dimming: PWM signal >2~8VDC or open circuit, between PWM DIM and DIM- Power OFF : PWM signal <0.5VDC or short or PWM duty is equal to 0%, between PWM DIM and DIM-
PWM DIMMING FREQUENCY
1K~10KHz
QUIESCENT INPUT CURRENT IN SHUTDOWN MODE(Typ.)
7mA when PWM dimming OFF

ANALOG DIMMING & ON/OFF CONTROL

REMOTE ON/OFF
Leave open if not used Power on with dimming: DC input >0.25~8VDC or open circuit, between Analog DIM and DIM- Power off : DC input <0.2VDC or short, between Analog DIM and DIM-
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
QUIESCENT INPUT CURRENT IN SHUTDOWN MODE(Typ.)
7mA when Analog dimming OFF

PROTECTION

SHORT CIRCUIT
Protection type : Power OFF and fuse open
OVER VOLTAGE (max.)
75V 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) type or (Blank) DA type],1.04CUFT(W type or WDA type)
Test conditions and notes3
  1. 1. All parameters are specified at normal input(12VDC,24VDC), rated load, 25℃ 70% RH ambient.
  2. 2. (Blank) type and W type output voltage must step up by 3 Volts from input DC voltage; (Blank)DA type and WDA 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-45A-700W Mechanical Specification
Mechanical Specification
LDH-45A-700W Standard Application
Standard Application
LDH-45A-700W Efficiency VS Output Voltage(Number
Efficiency VS Output Voltage(Number
LDH-45A-700W Application Notes of EMC
Application Notes of EMC

Downloads

FAQ

Can I use the LDH-45A-700W for a 700mA constant current downlight project?

Yes, this model is intended for constant current LED loads at 700mA. It supports a 12-64V constant current output range and up to 44.8W, which suits compatible LED downlights in that operating window.

Is this a fit for small signage modules that are not constant voltage?

Yes, if the signage module is built as a 700mA constant current load. This driver is not for constant voltage LED products; it is a step-up constant current driver rated 44.8W with a 12-64V range.

Can the LDH-45A-700W run a small multi-LED board or light engine?

It can run a small LED array when the board is specified for 700mA constant current operation. The total LED forward voltage must stay within 12-64V, and the total load must remain within 44.8W.

How should I check LED compatibility with this 700mA driver?

Start by confirming the LEDs require constant current rather than constant voltage. This model delivers 700mA over a 12-64V constant current range, and the usable number of LEDs depends on each LED forward voltage instead of a preset LED count.

What differentiates the LDH-45A-700W from the other 700mA LDH-45A models?

All four 700mA LDH-45A versions are rated 44.8W with a 64V maximum output, but LDH-45A-700 and LDH-45A-700W use a 12-64V constant current range while LDH-45A-700DA and LDH-45A-700WDA use 24-64V. The W and WDA models are wire style, while the non-W versions are pin style.

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Mean Well LDH-45A-700W DC/DC LED Driver CC 700mA - Step-up
Mean Well

Mean Well LDH-45A-700W DC/DC LED Driver CC 700mA - Step-up

$12.69 USD

LDH-45A-700W is the model of this series: rated current 700mA, rated power 44.8W, typical efficiency 90%.

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%
  • PWM + analog dimming and remote ON/OFF control [(Blank) type or W type]
  • 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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