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Mean Well NLDD-350HW DC/DC LED Driver CC 350mA - Step-down Wire Type

constant currentstep downhigh efficiency up to 97%IP67wire style

SKU NLDD-350HW

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Overview

NLDD-350HW is the model of this series: typical efficiency 96% at full load and 36VDC/48VDC input.

NLDD-H series is a 60W DC/DC LED driver featuring constant current output. NLDD-H operates from 10~56VDC and offers models with different rated current ranging between 350mA and 1400mA. With the high efficiency up to 96%, The 94V-0 flame retardant plastic case the fully-potted silicone to enhance the heat dissipation allows this series to fit for classⅢ or DC bus lighting application.

Features

DC/DC step-down converter
Constant current output: 350mA to 1400mA
Wide input voltage: 10 ~ 56VDC(59VDC Max.)
Wide output LED forward voltage: 6 ~ 52VDC
High efficiency up to 96%
Comply with BS EN/EN61347 and BS EN/EN55015 regulation
For class Ⅲ application(SELV)
Built-in PWM and remote ON/OFF control
Protections: Short circuit / Over temperature
Cooling by free air convection
Fully encapsulated and compact site
Suitable for driving illumination LED
3 years warranty

Specifications

NLDD-350HWSpecifications from the official datasheet (2024-10-16 edition)

OUTPUT

CURRENT RANGE: 350mA
VOLTAGE RANGE^Note.4: 6 ~ 52VDC
CURRENT ACCURACY (Typ.): ±5% at 48VDC input
RIPPLE & NOISE(max.)^Note.2: 150mVp-p
SWITCHING FREQENCY: 200KHz

INPUT

VOLTAGE RANGE: 10 ~ 56VDC (59VDC Max.)
EFFICIENCY (max.): 96% at full load and 36VDC/48VDC input
DC CURRENT Full load^Note.3: 350mA
DC CURRENT No load: 5mA

PWM DIMMING & ON/OFF CONTROL

REMOTE ON/OFF: Leave open if not use Power ON with dimming: DIM ~ -Vin >2.5 ~ 5VDC or open circuit Power OFF : DIM ~ -Vin < 0.8VDC or short
PWM FREQUENCY: 100 ~ 1KHz
QUIESCENT INPUT CURRENT IN SHUTDOWN MODE(max.): 2mA at PWM dimming OFF at 48VDC input

PROTECTION

SHORT CIRCUIT: Regulated at rated current Protection type: Can be continued, recovers automatically after fault condition is removed
OVER TEMPERATURE: Tj 165℃ typically(IC1) detect on main control IC Protection type : Shut down, recovers automatically after temperature goes down

ENVIRONMENT

WORKING TEMP.: -40 ~ + 50℃(Refer to derating curve)
WORKING HUMIDITY: 20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +85℃, 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.): 90℃
SOLDERING TEMPERATURE: Wave soldering: 265℃,5s (max.); Manual soldering: 390℃,3s (max.)

EMC

SAFETY STANDARDS: LVD BS EN/EN61347-1, BS EN/EN61347-2-13;IEC61347 and EAC TP TC 004 approved
EMC EMISSION: Compliance to BS EN/EN55015, BS EN/EN61547
EMC IMMUNITY: Compliance to BS EN/EN61000-4-2,3,4,6,8, light industry level, EAC TP TC 020

OTHERS

MTBF: 29984.3K hrs min. Telcordia SR-332 (Bellcore) 2881.6Khrs min. MIL-HDBK-217F (25℃)
DIMENSION: 32.1*20.5*12.5mm or 1.26"*0.8"*0.49" inch (L*W*H)
WEIGHT: NLDD-H:15.6g ; NLDD-HW:18g (Please refer to Page 6 for packing)
POTTING MATERIAL: Expoxy(UL94-V0)

Test conditions and notes7

1.All parameters are specified at normal input(48VDC), rated load, 25℃ 70% RH ambient.
2.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1μf capacitor.
3.Test condition: 48VDC input.
4.Output voltage will always step down by 4 volts from input DC voltage.
5.The output of NLDD-H should not be connected to the input of the same unit or output from other sources.
6.The power supply is regarded as a part of the components in the system, and the final EMI test needs to be tested with the final device. If an additional EMI filter circuit is required to meet the electromagnetic compatibility requirements, please refer to the EMC test report for details. (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf)
7.Please refer to the warranty statement on MEAN WELL's website at http://www.meanwell.com

Technical drawings

NLDD-350HW Mechanical Specification — Mechanical Specification

NLDD-350HW Derating Curve — Derating Curve

NLDD-350HW PWM Dimming Control — PWM Dimming Control

NLDD-350HW Efficiency VS Output Voltage — Efficiency VS Output Voltage

Typical applications

DC battery source lighting
Portable lighting
Commercial lighting
DC 48V Track lighting
DC 24V landscape lighting

Downloads

Certificates3

Mean Well NLDD-H-EMC Certificate PDF Download

Mean Well NLDD-CE-dec Certificate PDF Download

Mean Well NLDD-UK-dec Certificate PDF Download

Test reports1

Mean Well NLDD-350H Test Report PDF Download

FAQ

Can the NLDD-350HW be used for a 350mA LED downlight retrofit?

Yes, when the downlight is built for constant current operation at 350mA. The NLDD-350HW is a 60W step-down constant current driver, so it is intended for LED loads that need regulated current instead of fixed voltage.

Is this a good option for outdoor signage modules or small LED arrays?

It can be used for signage modules or small LED arrays when the LED load is rated for 350mA constant current. The unit is fully potted in epoxy (UL94-V0) and fully encapsulated, supporting use in enclosed conditions, but the load still has to fit within the driver's 6-52V constant current range.

Can I use the NLDD-350HW in sealed or weather-exposed LED assemblies?

The operating range of -40°C to +50°C and fully encapsulated, potted design make it suitable for enclosed LED products within those limits. It is still a constant current step-down driver, so it should be paired with LED modules designed for constant current control.

What kind of LED load matches the NLDD-350HW?

This driver is meant for constant current LED loads, not constant voltage strips or modules. The constant current output range is 52-6V, and the actual number of LEDs depends on the forward voltage of each LED rather than a preset quantity.

What is the difference between the NLDD-350HW and the other NLDD wire-style models?

In the wire-style group, the listed siblings are NLDD-500HW at 500mA with 6-52V, NLDD-700HW at 700mA with 6-52V, NLDD-1050HW at 1050mA with 6-52V, NLDD-1200HW at 1200mA with 6-46V, and NLDD-1400HW at 1400mA with 6-46V, with all shown as 60W models. The NLDD-350HW is the wire-style 350mA version in that same series.

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Model	Power	Voltage	Current	IP Rating
Mean Well NLDD-1050HW DC/DC LED Driver CC 1050mA - Step-down Wire Type	60W	52V	1.05A	IP20	View
Mean Well NLDD-700HW DC/DC LED Driver CC 700mA - Step-down Wire Type	60W	52V	0.7A	IP20	View
Mean Well NLDD-700H DC/DC LED Driver CC 700mA - Step-down	60W	52V	0.7A	IP20	View
Mean Well NLDD-500HW DC/DC LED Driver CC 500mA - Step-down Wire Type	60W	52V	0.5A	IP20	View
Mean Well NLDD-500H DC/DC LED Driver CC 500mA - Step-down	60W	52V	0.5A	IP20	View
Mean Well NLDD-350H DC/DC LED Driver CC 350mA - Step-down	60W	52V	0.35A	IP20	View
Mean Well NLDD-1400HW DC/DC LED Driver CC 1400mA - Step-down Wire Type	60W	46V	1.4A	IP20	View
Mean Well NLDD-1400H DC/DC LED Driver CC 1400mA - Step-down	60W	46V	1.4A	IP20	View
Mean Well NLDD-1200HW DC/DC LED Driver CC 1200mA - Step-down Wire Type	60W	46V	1.2A	IP20	View
Mean Well NLDD-1200H DC/DC LED Driver CC 1200mA - Step-down	60W	46V	1.2A	IP20	View
Mean Well NLDD-1050H DC/DC LED Driver CC 1050mA - Step-down	60W	52V	1.05A	IP20	View

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