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Mean Well LDH-45A-350DA DC/DC LED Driver CC 350mA - Step-up

constant currentstep uphigh efficiency up to 95%pin style

SKU LDH-45A-350DA

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Overview

LDH-45A-350DA is the model of this series: rated current 350mA, rated power 30.1W, typical efficiency 91%. 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-45A-350DASpecifications from the official datasheet (2024-10-16 edition)

OUTPUT

RATED CURRENT: 350mA
CURRENT ACCURACY(Typ.): ±5% at 12VDC input
VOLTAGE RANGE DALI^Note.2: 24~86VDC
NO LOAD OUTPUT VOLTAGE(max.): 100V
RATED POWER: 30.1W
RIPPLE & NOISE (max.)^Note.3: 2.5Vp-p

INPUT

RATED VOLTAGE: 12VDC
VOLTAGE RANGE^Note.2: 9~18VDC
EFFICIENCY (max.): 91%
DC CURRENT (Typ.): 2.8A

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. All parameters are specified at normal input(12VDC,24VDC), rated load, 25℃ 70% RH ambient.
2. (Blank)DA type output voltage must step up by 12 Volts from input DC voltage.
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-350DA Mechanical Specification — Mechanical Specification

LDH-45A-350DA Standard Application — Standard Application

LDH-45A-350DA Efficiency VS Output Voltage(Number — Efficiency VS Output Voltage(Number

LDH-45A-350DA Application Notes of EMC — Application Notes of EMC

Downloads

Datasheet1

LDH-45A-350DA datasheetLDH-45-spec.pdf · 2024-10-16 edition PDF Download

Certificates3

Mean Well LDH-45-EMC Certificate PDF Download

Mean Well LDH-45(DA)-CE-dec Certificate PDF Download

Mean Well LDH-45(DA)-UK-dec Certificate PDF Download

Test reports1

Mean Well LDH-45A-350 Test Report PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can the LDH-45A-350DA power a 350mA LED downlight array?

Yes, if the downlight array is specified for 350mA constant current operation and its total forward voltage is within the 24-86V CC range. This driver regulates current, so it is for constant current LED loads rather than constant voltage LED products.

Is this driver a fit for narrow signage modules or linear LED arrays?

It can be a fit when the modules or array are constant current types rated for 350mA and the full forward voltage stays within 24-86V. With a 30.1W rating, it is intended for moderate-power constant current LED applications within that range.

Can I use the LDH-45A-350DA in outdoor or cold-weather fixtures?

For cold weather, it operates from -40°C to +70°C (refer to the derating curve). The datasheet gives no IP or waterproof rating, so outdoor fixtures must protect it from water and condensation. The LED load still needs to match the 350mA constant current output and 24-86V CC window.

How do I check LED compatibility for the LDH-45A-350DA?

Confirm that the LED load is a 350mA constant current design and that the total forward voltage falls between 24V and 86V. The number of LEDs depends on each LED forward voltage, so compatibility is determined by total string voltage rather than a stated LED quantity.

How does the LDH-45A-350DA compare with related 350 output-current models?

LDH-45A-350 and LDH-45A-350W are 30.1W with a 12-86V range and LDH-45A-350DA and LDH-45A-350WDA are 30.1W with a 24-86V range. LDH-45B-350 and LDH-45B-350W are 44.1W with a 21-126V CC range, and LDH-45B-350DA and LDH-45B-350WDA are 44.1W with a 36-126V CC range.

Payment & Security

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Model	Power	Voltage	Current	IP Rating
Mean Well LDH-45A-700WDA DC/DC LED Driver CC 700mA - Step-up	44.8W	64V	0.7A	IP67	View
Mean Well LDH-45A-700W DC/DC LED Driver CC 700mA - Step-up	44.8W	64V	0.7A	IP67	View
Mean Well LDH-45A-700DA DC/DC LED Driver CC 700mA - Step-up	44.8W	64V	0.7A	IP67	View
Mean Well LDH-45A-700 DC/DC LED Driver CC 700mA - Step-up	44.8W	64V	0.7A	IP67	View
Mean Well LDH-45A-500WDA DC/DC LED Driver CC 500mA - Step-up	43W	86V	0.5A	IP67	View
Mean Well LDH-45A-500W DC/DC LED Driver CC 500mA - Step-up	43W	86V	0.5A	IP67	View
Mean Well LDH-45A-500DA DC/DC LED Driver CC 500mA - Step-up	43W	86V	0.5A	IP67	View
Mean Well LDH-45A-500 DC/DC LED Driver CC 500mA - Step-up	43W	86V	0.5A	IP67	View
Mean Well LDH-45A-350WDA DC/DC LED Driver CC 350mA - Step-up	30.1W	86V	0.35A	IP67	View
Mean Well LDH-45A-350W DC/DC LED Driver CC 350mA - Step-up	30.1W	86V	0.35A	IP67	View
Mean Well LDH-45A-350 DC/DC LED Driver CC 350mA - Step-up	30.1W	86V	0.35A	IP67	View
Mean Well LDH-45A-1050WDA DC/DC LED Driver CC 1050mA - Step-up	45.15W	43V	1.05A	IP67	View
Mean Well LDH-45A-1050W DC/DC LED Driver CC 1050mA - Step-up	45.15W	43V	1.05A	IP67	View
Mean Well LDH-45A-1050DA DC/DC LED Driver CC 1050mA - Step-up	45.15W	43V	1.05A	IP67	View
Mean Well LDH-45A-1050 DC/DC LED Driver CC 1050mA - Step-up	45.15W	43V	1.05A	IP67	View

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Mean Well LDH-45A-350DA DC/DC LED Driver CC 350mA - Step-up

Overview

Features

Specifications

OUTPUT

INPUT

ANALOG DIMMING & ON/OFF CONTROL

PROTECTION

ENVIRONMENT

SAFETY & EMC

OTHERS

MODEL ENCODING

Technical drawings

Downloads

Datasheet1

Certificates3

Test reports1

Catalogues1

FAQ

Payment & Security

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Mean Well LDH-45A-350DA DC/DC LED Driver CC 350mA - Step-up

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