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Mean Well

Mean Well LDD-700LW DC/DC LED Driver CC 700mA - Step-down

constant currentstep downhigh efficiency up to 97%IP67wire style
SKU LDD-700LW
$5.75 USD
Shipping calculated at checkout.
In stock
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Overview

LDD-700LW is the model of this series: typical efficiency 95% at full load and 24VDC/36VDC input for LDD-300~700L/LW ; 95% at full load and 24VDC input for LDD-300~700LS.

Features

  • DC/DC step-down converter
  • Constant current output: 300mA to 700mA
  • Wide input voltage: 9 ~ 36VDC
  • Wide output LED string voltage: 2 ~ 32VDC
  • High efficiency up to 95%
  • Built-in EMI filter, comply with BS EN/EN55015 and FCC part15 without additional input filter and capacitors
  • Built-in PWM dimming and remote ON/OFF control
  • Protections: Short circuit / Over temperature
  • Cooling by free air convection
  • Fully encapsulated with IP67 level for pin and wire style
  • Compact size
  • Low cost, high reliability
  • Suitable for driving illumination LED
  • 3 years warranty

Specifications

LDD-700LWSpecifications from the official datasheet (2026-09-15 edition)

OUTPUT

CURRENT RANGE
700mA
VOLTAGE RANGENote.4
2 ~ 32VDC for LDD-300~700L/LW ; 2~ 28VDC for LDD-300~700LS
CURRENT ACCURACY (Typ.)
±5% at 24VDC input
RIPPLE & NOISE(max.)Note.2
200mVp-p
SWITCHING FREQENCY
40KHz ~ 1000KHz
EXTERNAL CAPACITANCE LOAD (max.)
2.2uF

INPUT

VOLTAGE RANGE
9 ~ 36VDC for LDD-300~700L/LW ; 9~ 32VDC for LDD-300~700LS
EFFICIENCY (max.)
95% at full load and 24VDC/36VDC input for LDD-300~700L/LW ; 95% at full load and 24VDC input for LDD-300~700LS
DC CURRENT Full loadNote.3
700mA
DC CURRENT No load
5mA
FILTER
Capacitor

PWM DIMMING & ON/OFF CONTROL

REMOTE ON/OFF
Leave open if not use Power ON with dimming: DIM ~ -Vin >3.5 ~ 8VDC or open circuit Power OFF : DIM ~ -Vin < 0.5VDC or short
PWM FREQUENCY
100 ~ 1KHz
QUIESCENT INPUT CURRENT IN SHUTDOWN MODE(max.)
1mA at PWM dimming OFF and 24VDC input

PROTECTION

SHORT CIRCUIT
Regulated at rated output current Protection type: Can be continued, recovers automatically after fault condition is removed
OVER TEMPERATURE
Tj 150℃ typically(IC1) detect on main control IC Protection type : Shut down, recovers automatically after temperature goes down

ENVIRONMENT

WORKING TEMP.
-40 ~ + 85℃(Refer to derating curve)
WORKING HUMIDITY
20% ~ 90% RH non-condensing for LDD-300~700L/LW ; 20% ~ 85% RH non-condensing for LDD-300~700LS
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.)
100℃

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
1000Khrs min. MIL-HDBK-217F (25℃)
DIMENSION
22.6*9.9*8.9mm or 0.89"*0.39"*0.35" inch (L*W*H) for LDD-300~700L/LW ; 25.4*10.5*9.3mm or 1"*0.4135"*0.366" inch (L*W*H) for LDD-300~700LS
WEIGHT
LDD-300~700L:4g ; LDD-300~700LW:7.3g ; LDD-300~700LS :3.4g
POTTING MATERIAL
Expoxy(UL94-V0) for LDD-300~700L/LW ; without potted for LDD-300~700LS
Test conditions and notes5
  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.Test condition: 24VDC input.
  4. 4.Output voltage will always step down by 3 volts from input DC voltage.
  5. 5.The output of LDD-L should not be connected to the input of the same unit or output from other sources.

Technical drawings

LDD-700LW Features
Features
LDD-700LW Mechanical Specification
Mechanical Specification
LDD-700LW Recommended PCB layout (for LDD-300~700LS)
Recommended PCB layout (for LDD-300~700LS)
LDD-700LW Mechanical Specification
Mechanical Specification
LDD-700LW Derating Curve
Derating Curve
LDD-700LW Analog Dimming Control for 1000mA
Analog Dimming Control for 1000mA
LDD-700LW Efficiency VS Output Voltage(Number
Efficiency VS Output Voltage(Number
LDD-700LW Packing
Packing
LDD-700LW LDD-LS
LDD-LS
LDD-700LW LDD-LS (2)
LDD-LS (2)
LDD-700LW LDD-1000L
LDD-1000L
LDD-700LW Standard Tube Packing
Standard Tube Packing

Downloads

FAQ

Can I use the LDD-700LW for a lower-voltage 700mA LED downlight?

Yes, this model is suitable for 700mA constant current LED loads within a 2-32V output range. It fits lower-voltage downlight engines and similar LED assemblies that stay within those limits. It is a constant current driver rather than a constant voltage supply.

Is the LDD-700LW a fit for small LED arrays with shorter series strings?

Yes, it fits LED arrays whose total forward voltage stays within its 2-32V constant current range. The driver provides 700mA output from a 9-36VDC input, with the output stepping down about 3V below the input. That makes it suitable for smaller arrays built around lower total forward voltage.

Can this driver be used for compact signage modules?

Yes, if the signage module string is designed for 700mA constant current operation and falls within 2-32V. Its compact dimensions of 22.6 × 9.9 × 8.9 mm also make it useful where space is limited. It should not be used for signage products that require constant voltage input.

Is the LDD-700LW suitable for outdoor or damp environments?

The wire-style driver is fully encapsulated to IP67 level, so it is intended for applications needing sealed protection against dust and water ingress. The working temperature range is -40°C to +85°C, with full load up to 71°C and derating above that. That combination supports use in demanding indoor or outdoor equipment where the rest of the assembly is also properly protected.

How do I size an LED load for the LDD-700LW?

Choose LEDs that require 700mA constant current and make sure the total forward voltage stays within the 2-32V constant current range. The number of LEDs depends on each LED's forward voltage, so there is no universal LED count. If the LED product is specified for constant voltage, this is not the correct driver type.

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Mean Well LDD-700LW DC/DC LED Driver CC 700mA - Step-down
Mean Well

Mean Well LDD-700LW DC/DC LED Driver CC 700mA - Step-down

$5.75 USD

LDD-700LW is the model of this series: typical efficiency 95% at full load and 24VDC/36VDC input for LDD-300~700L/LW ; 95% at full load and 24VDC input for LDD-300~700LS.

Features

  • DC/DC step-down converter
  • Constant current output: 300mA to 700mA
  • Wide input voltage: 9 ~ 36VDC
  • Wide output LED string voltage: 2 ~ 32VDC
  • High efficiency up to 95%
  • Built-in EMI filter, comply with BS EN/EN55015 and FCC part15 without additional input filter and capacitors
  • Built-in PWM dimming and remote ON/OFF control
  • Protections: Short circuit / Over temperature
  • Cooling by free air convection
  • Fully encapsulated with IP67 level for pin and wire style
  • Compact size
  • Low cost, high reliability
  • Suitable for driving illumination LED
  • 3 years warranty
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