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Mean Well

Mean Well LDC-55 Linear LED Driver 55W 500~1600mA Adjustable Output

constant powerflicker freeultra slim design30mm width
SKU LDC-55
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Overview

LDC-55 is the model of this series: rated power 55W, typical efficiency 90%(230VAC@Full load). Type Blank: Non dimming.

LDC-55 series is a 55W AC/DC LED driver featuring the Constant Power mode output. LDC-55 operates from 180~295VAC and output current can be adjust between 500mA to 1600mA. Thanks to the efficiency up to 90%, with the fanless design, the entire series is able to operate -25℃~+80℃ case temperature under free air convection.LDC-55 is equipped with various function options, such as dimming methodologies, so as to provide the optimal design flexibility for LED lighting system.

Features

  • Constant Power mode output
  • Metal housing design
  • Full Power at 70~100% max Current
  • Built-in active PFC function
  • Flicker Free design
  • Class 2 power supply
  • No load / Standby power consumption <0.5W
  • Output current level pre-settable
  • Typical lifetime>50000 hours
  • SELV and Isolated
  • 5 years warranty

Specifications

LDC-55Specifications from the official datasheet (2026-02-09 edition)

OUTPUT

OUTPUT CURRENT REGION
500 ~ 1600mA(1050mA default)
RATED POWERNote.2
55W
CONSTANT CURRENT REGIONNote.2
27 ~ 56V
FULL POWER CURRENT RANGE
980 ~ 1600mA
OPEN CIRCUIT VOLTAGE(max.)
60V
LOW FREQUENCY CURRENT RIPPLE
3.0% max. @rated current
CURRENT TOLERANCE
±5.0%
SET UP TIMENote.4
500ms/230VAC

INPUT

VOLTAGE RANGENote.3
180 ~ 295VAC (Please refer to "STATIC CHARACTERISTIC" section)
FREQUENCY RANGE
47 ~ 63Hz
POWER FACTOR (Typ.)
PF≧0.95/230VAC@load≧50%; PF≧0.9/277VAC@load≧75% (Please refer to "POWER FACTOR (PF) CHARACTERISTIC" section)
TOTAL HARMONIC DISTORTION
THD< 10%(@load≧50%/230VAC; @load≧75%/277VAC) (Please refer to “TOTAL HARMONIC DISTORTION(THD)” section)
EFFICIENCY (Typ.)Note.6
90%(230VAC@Full load)
AC CURRENT (Typ.)
0.35A / 230VAC 0.25A / 277VAC
INRUSH CURRENT(Typ.)
COLD START 30A(twidth=300μs measured at 50% Ipeak)/230VAC; Per NEMA 410
MAX. No. of PSUs on 16A CIRCUIT BREAKER
17 units (circuit breaker of type B) / 29 units (circuit breaker of type C) at 230VAC
LEAKAGE CURRENT
<0.75mA / 277VAC

PROTECTION

SHORT CIRCUIT
Hiccup mode or constant current limiting ,recovers automatically after fault condition is removed
OVER VOLTAGE
61 ~ 80V Shut down o/p voltage with auto-recovery or re-power on to recovery
OVER TEMPERATURE
Shut down o/p voltage, with auto-recovery

FUNCTION

DIMMING
Please refer to“DIMMING OPERATION”section
TEMP. COMPENSATION
By external NTC, please refer to“TEMPERATURE COMPENSATION OPERATION”section

ENVIRONMENT

WORKING TEMP.
Tcase=-25 ~ +80℃ (Please refer to “ OUTPUT LOAD vs TEMPERATURE” section)
MAX. CASE TEMP.
Tcase=+80℃
WORKING HUMIDITY
20 ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY
-40 ~ +80℃, 10 ~ 95% RH
TEMP. COEFFICIENT
±0.03%/℃ (0 ~ 60℃)
VIBRATION
10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDSNote.5
Ul8750, CSA C22.2 No. 250.13-12; ENEC BS EN/EN61347-1, BS EN/EN61347-2-13, AS/NZS 61347.1, AS/NZS IEC 61347.2.13; BS EN/EN62384; GB/T19510.1,GB/T19510.213, EAC TP TC 004, BIS IS15885 approved
WITHSTAND VOLTAGE
I/P-O/P:3.75KVAC I/P-FG:2.0KVAC O/P-FG:1.5KVAC
ISOLATION RESISTANCE
I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSIONNote.5
Compliance to BS EN/EN55015,BS EN/EN61000-3-2 Class C (@load≧50%) ; BS EN/EN61000-3-3;GB/T17743, GB17625.1,EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61000-4-2,3,4,5,6,8,11; BS EN/EN61547, light industry level(surge immunity:Line-Earth: 2KV,Line-Line:1KV),EAC TP TC 020

OTHERS

MTBF
2521K hrs min. Telcordia SR-332 (Bellcore) 226.1Khrs min. MIL-HDBK-217F (25℃)
DIMENSION
320*30*21mm (L*W*H)
PACKING
0.255Kg;48pcs/13.24Kg/0.92CUFT

MODEL ENCODING

Blank (this model)
Non dimming
B
3 in 1 dimming function (0~10Vdc and10V PWM signal and resistance)
DA
DALI,push dimming
DA2
DALI-2,push dimming
Test conditions and notes9
  1. 1. All parameters NOT specially mentioned are measured at 230VAC input, rated current and 25℃ of ambient temperature.
  2. 2. Please refer to " OUTPUT CURRENT SETTING ".
  3. 3. De-rating may be needed under low input voltages. Please refer to “STATIC CHARACTERISTIC” sections for details.
  4. 4. Length of set up time is measured at first cold start. Turning ON/OFF the power supply may lead to increase of the set up time.
  5. 5. The driver is considered as a component that will be operated in combination with final equipment. Since EMC performance will be affected by the complete installation, the final equipment manufacturers must re-qualify EMC Directive on the complete installation again. (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf)
  6. 7. This series meets the typical life expectancy of >50000 hours of operation when Tcase, particularly tc point (or TMP, per DLC), is about 70℃ or less.
  7. 8. Please refer to the warranty statement on MEAN WELL's website at http://www.meanwell.com.
  8. 9. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).
  9. 10. To fulfill requirements of the latest ErP regulation for lighting fixtures, this LED power supply can only be used behind a switch without permanently connected to the mains.

Technical drawings

LDC-55 BLOCK DIAGRAM
BLOCK DIAGRAM
LDC-55 OUTPUT CURRENT SETTING
OUTPUT CURRENT SETTING
LDC-55 TEMPERATURE COMPENSATION OPERATION (2)
TEMPERATURE COMPENSATION OPERATION (2)
LDC-55 STATIC CHARACTERISTIC
STATIC CHARACTERISTIC
LDC-55 TOTAL HARMONIC DISTORTION
TOTAL HARMONIC DISTORTION
LDC-55 LIFE TIME
LIFE TIME
LDC-55 MECHANICAL SPECIFICATION
MECHANICAL SPECIFICATION

Typical applications

  • LED panel lighting
  • Indoor LED lighting
  • Linear LED lighting

Downloads

FAQ

Can I use the LDC-55 for higher-power LED downlights?

Yes, if the downlight is designed for constant current operation and the LED load falls within the 27-56V constant current range. Output current is adjustable from 500 to 1600mA (1050mA default) with a resistor on the IADJ terminals, the full 55W is available from 980 to 1600mA, and it uses constant current operation rather than constant voltage output.

Is the LDC-55 a fit for larger signage modules or LED light boxes?

It can be a fit for signage modules designed as a constant current LED load within 27-56V at a current set between 500 and 1600mA. This driver is not for constant voltage signage systems, so the module should be specified for constant current operation.

Can the LDC-55 run a small LED array with more power than a 35W driver?

Yes, if the array is built for constant current operation within the 500-1600mA adjustable range and its total forward voltage is within 27-56V. The driver is rated at 55W, with full power available from 980 to 1600mA, but the load still has to match the current and voltage window of this driver.

What LED load is compatible with the LDC-55?

The compatible load is a constant current LED assembly whose current is within the 500-1600mA setting range (1050mA default) and whose total forward voltage is in the 27-56V CC range, at no more than 55W. The number of LEDs depends on each LED's forward voltage, so the correct match is determined by the load's total forward voltage rather than a fixed LED count.

How does the LDC-55 compare to other LDC linear series options?

LDC-55 is a 55W constant power mode driver with a 500-1600mA adjustable output and a 27-56V CC range. On the same sheet, the B-type adds 3-in-1 dimming (0-10VDC, 10V PWM or resistance) and the DA-type adds DALI and push dimming at the same 55W rating; the standard LDC-55 has no dimming input but offers NTC temperature compensation.

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Mean Well LDC-55 Linear LED Driver 55W 500~1600mA Adjustable Output
Mean Well

Mean Well LDC-55 Linear LED Driver 55W 500~1600mA Adjustable Output

Log in to see price

LDC-55 is the model of this series: rated power 55W, typical efficiency 90%(230VAC@Full load). Type Blank: Non dimming.

LDC-55 series is a 55W AC/DC LED driver featuring the Constant Power mode output. LDC-55 operates from 180~295VAC and output current can be adjust between 500mA to 1600mA. Thanks to the efficiency up to 90%, with the fanless design, the entire series is able to operate -25℃~+80℃ case temperature under free air convection.LDC-55 is equipped with various function options, such as dimming methodologies, so as to provide the optimal design flexibility for LED lighting system.

Features

  • Constant Power mode output
  • Metal housing design
  • Full Power at 70~100% max Current
  • Built-in active PFC function
  • Flicker Free design
  • Class 2 power supply
  • No load / Standby power consumption <0.5W
  • Output current level pre-settable
  • Typical lifetime>50000 hours
  • SELV and Isolated
  • 5 years warranty

Typical applications

  • LED panel lighting
  • Indoor LED lighting
  • Linear LED lighting
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