☎ (888) 228 9138

Over 15 years experience of providing support of MEAN WELL Power Supplies

Image shown is a representation only. Exact specifications should be obtained from the product datasheet.

Mean Well

Mean Well LDH-45A-1050W DC/DC LED Driver CC 1050mA - Step-up

constant currentstep uphigh efficiency up to 95%wire style
SKU LDH-45A-1050W
$12.69 USD
Shipping calculated at checkout.
In stock
|

Overview

LDH-45A-1050W is the model of this series: rated current 1050mA, rated power 45.15W, 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-1050WSpecifications from the official datasheet (2024-10-16 edition)

OUTPUT

RATED CURRENT
1050mA
CURRENT ACCURACY(Typ.)
±5% at 12VDC input
VOLTAGE RANGE Non-DALINote.2
12~43VDC
VOLTAGE RANGE DALINote.2
24~43VDC
NO LOAD OUTPUT VOLTAGE(max.)
50V
RATED POWER
45.15W
RIPPLE & NOISE (max.)Note.3
1.9Vp-p

INPUT

RATED VOLTAGE
12VDC
VOLTAGE RANGENote.2
9~18VDC
EFFICIENCY (max.)
91%
DC CURRENT (Typ.)
4.2A

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.)
50V 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. 1. All parameters are specified at normal input(12VDC,24VDC), rated load, 25℃ 70% RH ambient.
  2. 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. 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-1050W Mechanical Specification
Mechanical Specification
LDH-45A-1050W Standard Application
Standard Application
LDH-45A-1050W Efficiency VS Output Voltage(Number
Efficiency VS Output Voltage(Number
LDH-45A-1050W Application Notes of EMC
Application Notes of EMC

Downloads

FAQ

Can the LDH-45A-1050W be used for a constant current LED downlight?

Yes, this model is intended for constant current LED loads at 1050mA, including LED downlights whose total forward voltage is within the 12-43V CC range. It should not be used in place of a constant voltage power supply for LED products that require fixed-voltage input.

Is this a good fit for compact signage lighting that uses high-power LEDs?

It can be, provided the signage lighting uses a 1050mA constant current LED load and the total forward voltage stays between 12V and 43V. With 45.15W available, it is intended for higher-power constant current LED applications rather than low-power constant voltage modules.

Can I use the LDH-45A-1050W for a small LED array in a sealed fixture?

Yes, a sealed fixture suits it, since the datasheet gives no IP or waterproof rating for the driver itself; the operating temperature range is -40°C to +70°C (refer to the derating curve). The LED array still must be a 1050mA constant current load within the 12-43V CC range.

What kind of LED load matches the LDH-45A-1050W?

The correct match is a constant current LED load rated at 1050mA with a total forward voltage from 12V to 43V. The number of LEDs depends on each LED forward voltage, so the key check is whether the full LED string stays within that CC output range.

What is the difference between the LDH-45A-1050W and the other 1050 output-current LDH models?

LDH-45A-1050 and LDH-45A-1050W are both 45.15W models with a 12-43V CC range, while LDH-45A-1050DA and LDH-45A-1050WDA shift to a 24-43V CC range at the same 45.15W. LDH-45B-1050 and LDH-45B-1050W use a 21-43V CC range, and LDH-45B-1050DA and LDH-45B-1050WDA use 36-43V.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bizum
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • MB WAY
  • PayPal
  • Satispay
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

{ "id":8649405858112, "variants" :[{ "context":"default", "variant_id": 46609960632640, "sku":"LDH-45A-1050W", "inventory_qty" : 10, "customer" :true, "custom_html" :"\u003cdiv class=\"price\"\u003e\n \u003cdiv class=\"price__default\"\u003e\n \u003cstrong class=\"price__current\"\u003e$12.69\u003c\/strong\u003e\n \u003cs class=\"price__was\"\u003e\u003c\/s\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"unit-price relative\" hidden\u003e\u003cspan class=\"visually-hidden\"\u003eUnit price\u003c\/span\u003e\u003cspan class=\"unit-price__price\"\u003e\u003c\/span\u003e\u003cspan class=\"unit-price__separator\"\u003e \/ \u003c\/span\u003e\u003cspan class=\"unit-price__unit\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\n \u003cdiv class=\"price__no-variant\" hidden\u003e\n \u003cstrong class=\"price__current\"\u003eUnavailable\u003c\/strong\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e", "volume_html" :"\u003cvolume-pricing class=\"parent-display inside_product_form\" id=\"volume-pricing-main\" \u003e\u003c\/volume-pricing\u003e" } ] }
Mean Well LDH-45A-1050W DC/DC LED Driver CC 1050mA - Step-up
Mean Well

Mean Well LDH-45A-1050W DC/DC LED Driver CC 1050mA - Step-up

$12.69 USD

LDH-45A-1050W is the model of this series: rated current 1050mA, rated power 45.15W, 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
View product

  • Call us

    (888) 228 9138

  • Email us

    contact@wellforces.com

  • Business Hours

    Mon-Fri
    EST 9:00am-5:30pm

  • Wholesale and Trade Account

    Let's grow together
Back to top