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Mean Well

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

constant currentstep downhigh efficiency up to 97%IP67pin style
SKU LDD-700H-WDA
$15.95 USD
Shipping calculated at checkout.
Available to order
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Overview

LDD-700H-WDA is the model of this series: typical efficiency 95% at full load and 48VDC input.

Features

  • DC/DC step-down converter
  • Constant current output: 350mA to 1400mA
  • Wide input voltage: 6 ~ 50VDC
  • Wide output LED string voltage: 3 ~ 45VDC
  • High efficiency up to 95%
  • Built-in EMI filter, comply with BS EN/EN55015 without additional input filter and capacitors
  • Built-in PWM and remote ON/OFF control(pin style only, wire style optional)
  • Protections: Short circuit
  • Cooling by free air convection
  • Fully encapsulated with IP65 level
  • Compact size
  • Suitable for driving illumination LED
  • 3 years warranty

Specifications

LDD-700H-WDASpecifications from the official datasheet (2022-06-06 edition)

OUTPUT

CURRENT RANGE
700mA
VOLTAGE RANGENote.4
3 ~ 45VDC
CURRENT ACCURACY (Typ.)
±5% at 48VDC input
RIPPLE & NOISE(max.)Note.2
500mVp-p
SWITCHING FREQENCY (Typ.)
500KHz
EXTERNAL CAPACITANCE LOAD (max.)
1400uF

INPUT

VOLTAGE RANGE
6 ~ 50VDC
EFFICIENCY (max.)
95% at full load and 48VDC input
DC CURRENT Full loadNote.3
550mA
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 >1.2 ~ 5VDC or open circuit, max. operation voltage 5.5VDC Power OFF : DIM ~ -Vin < 0.1VDC or short
PWM FREQUENCY
200Hz only
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
INPUT VOLTAGE LOCKOUT Start up
4.2VDC
INPUT VOLTAGE LOCKOUT Shut-down
3.8VDC

ENVIRONMENT

WORKING TEMP.
-40 ~ + 85℃(Refer to derating curve)
WORKING HUMIDITY
20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY
-55 ~ +125℃, 10 ~ 95% RH non-condensing
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, EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61547, 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
40.6*23.5*10.1mm or 1.6"*0.93"*0.40" inch (L*W*H)
PACKING
LDD-H-DA: 18g ; 12pcs/per tube, 336pcs/28 tube/per carton LDD-H-WDA:23g ; 8pcs/Box, 240pcs/30 Box/per carton
POTTING MATERIAL
Expoxy(UL94-V0)
Test conditions and notes5
  1. 1.All parameters are specified at normal input(48VDC), 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: 48VDC input for 350~1050mA, 28VDC input for 1400mA.
  4. 4.Output voltage will always step down by 3 volts from input DC voltage.
  5. 5.The output of LDD-H should not be connected to the input of the same unit or output from other sources.

Technical drawings

LDD-700H-WDA Mechanical Specification
Mechanical Specification
LDD-700H-WDA LDD-H-DA series
LDD-H-DA series
LDD-700H-WDA LDD-H-DA series (2)
LDD-H-DA series (2)
LDD-700H-WDA Efficiency VS Output Voltage(Number
Efficiency VS Output Voltage(Number
LDD-700H-WDA Derating Curve
Derating Curve
LDD-700H-WDA Packing
Packing
LDD-700H-WDA LDD-H-WDA
LDD-H-WDA

Downloads

FAQ

Can I use the LDD-700H-WDA for a 700mA LED downlight engine?

Yes, this is a constant current step-down driver with a 700mA output. It supports LED loads across a 3-45VDC output voltage range. That makes it suitable for downlight engines designed around 700mA constant current within that voltage range.

Is the LDD-700H-WDA suitable for compact signage light engines?

It can be used for compact signage light engines when the LED load requires 700mA constant current. The driver's output window is 3-45VDC in a compact 40.6 x 23.5 x 10.1mm package. Loads designed for constant voltage should use a constant voltage driver instead.

Can this model power a small LED array with a lower input range?

Yes, this model accepts a 6-50VDC input range. On the output side, it delivers 700mA constant current across 3-45VDC, and the output voltage always steps down by 3V from the DC input voltage. It is suited to small LED arrays that stay inside those output limits.

Can the LDD-700H-WDA be used in wet or outdoor equipment?

The driver is fully encapsulated with an IP65 rating, so it is intended for applications needing that level of ingress protection. Its working temperature range is -40°C to +85°C (refer to the derating curve), which supports demanding environmental conditions. The complete assembly still needs the rest of the system to be designed for the same environment.

How do I check LED compatibility with the LDD-700H-WDA?

Use it with LEDs that are designed for 700mA constant current and whose total forward voltage falls within the 3-45V constant current range. The number of LEDs will vary because it depends on each LED's forward voltage. This driver regulates current, so it is not intended for constant voltage LED loads.

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

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

$15.95 USD

LDD-700H-WDA is the model of this series: typical efficiency 95% at full load and 48VDC input.

Features

  • DC/DC step-down converter
  • Constant current output: 350mA to 1400mA
  • Wide input voltage: 6 ~ 50VDC
  • Wide output LED string voltage: 3 ~ 45VDC
  • High efficiency up to 95%
  • Built-in EMI filter, comply with BS EN/EN55015 without additional input filter and capacitors
  • Built-in PWM and remote ON/OFF control(pin style only, wire style optional)
  • Protections: Short circuit
  • Cooling by free air convection
  • Fully encapsulated with IP65 level
  • Compact size
  • Suitable for driving illumination LED
  • 3 years warranty
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