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

Name: Mean Well LDH-45A-350 DC/DC LED Driver CC 350mA - Step-up
Brand: Mean Well
SKU: LDH-45A-350
Price: 7.86 USD
Availability: InStock

constant currentstep uphigh efficiency up to 95%pin style

SKU LDH-45A-350

$7.86 USD ~~$11.42~~

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In stock

Overview

LDH-45A-350 is the model of this series: rated current 350mA, rated power 30.1W, typical efficiency 91%.

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

OUTPUT

RATED CURRENT: 350mA
CURRENT ACCURACY(Typ.): ±5% at 12VDC input
VOLTAGE RANGE Non-DALI^Note.2: 12~86VDC
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

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.): 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) type or (Blank) DA type],1.04CUFT(W type or WDA type)

Test conditions and notes3

1. All parameters are specified at normal input(12VDC,24VDC), rated load, 25℃ 70% RH ambient.
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. 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-350 Mechanical Specification — Mechanical Specification

LDH-45A-350 Standard Application — Standard Application

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

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

Downloads

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 I use the LDH-45A-350 for a 350mA LED downlight string?

Yes, if the downlight string is designed for constant current operation at 350mA and its total forward voltage is within the 12-86V CC range. Because this is a constant current driver, it is intended for LED loads that require current regulation rather than constant voltage input.

Is the LDH-45A-350 suitable for long small-LED arrays with higher forward voltage?

It can be, because the constant current range extends up to 86V at 350mA. That makes it suitable for LED arrays where the total forward voltage is relatively high but still within the 12-86V range and 30.1W rating.

Can this model be used for slim signage or edge-lit fixtures that use constant current LEDs?

Yes, if those LEDs are driven at 350mA constant current and the complete load stays inside the 12-86V CC range. It is not intended for constant voltage signage products that expect a fixed-voltage supply.

How many LEDs can the LDH-45A-350 run?

That depends on the forward voltage of each LED, not a fixed LED count. The driver supplies 350mA constant current across a 12-86V range, so the full LED string must stay within that voltage window.

What are the main differences between the 350 output-current LDH 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, LDH-45B-350DA and LDH-45B-350WDA are 44.1W with a 36-126V range, and the 500, 700 and 1050 versions use different output currents and voltage spans.

Payment & Security

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Model	Power	Voltage	Current	IP Rating
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-350DA DC/DC LED Driver CC 350mA - Step-up	30.1W	86V	0.35A	IP67	View

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

Overview

Features

Specifications

OUTPUT

INPUT

PWM DIMMING & ON/OFF CONTROL

ANALOG DIMMING & ON/OFF CONTROL

PROTECTION

ENVIRONMENT

SAFETY & EMC

OTHERS

Technical drawings

Downloads

Certificates3

Test reports1

Catalogues1

FAQ

Payment & Security

Other LDH-45A Models

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

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