MEAN WELL LDH-25 series DC-DC Step Up Constant Current LED Driver Owner’s Manual
- June 9, 2024
- MEAN WELL
Table of Contents
DC-DC Step-Up Constant Current LED driver
LDH – 25 series
http://www.meanwell.com.cn/Upload/PDF/LED_EN.pdf
Features
- Wide DC input voltage operation 9.5-32V
- DC/DC step-up converter
- Constant current output : 250mA to 700mA
- Wide output LED forward voltage up to 84V DC
- High efficiency up to 95.5%
- 2 in 1dimming (0-10V,PWM)
- Protections: Short circuit / Over voltage
- Cooling by free air convection
- Fully encapsulated
- 3 years warranty
Applications
- DC battery source lighting
- Portable lighting
- LED solar street lighting
- LED greehouse lighting
- LED Low-bay lighting
GTIN CODE
MW Search. httpsJiwww.meanwell.comlserviceGTIN.aspx
Description
LDH-25 series is a 25W DC/DC LED driver featuring constant current output. LDH-25 operates from 9.5-32VDC and offers models with different rated current ranging between 250mA and 700mA. With the high efficiency up to 95.5%, The 94V-0 flame retardant plastic case the fully-potted silicone enhance the heat dissipation allows this series to fit solar LED street light. LDH-25 is equipped with various function options, such as dimming methodologies, so as to provide the optimal design flexibility for DC source LED lighting system.
Model Encoding
SPECIFICATION
| MODEL | LDH-25-250❑ | LDH-25-350❑ | LDH-25-500❑ | LDH-25.700❑ |
|---|---|---|---|---|
| OUTPUT | RATED CURRENT | 250mA | 350mA | 500mA |
| CURRENT ACCURACY(Typ.) | ±5% at 12VDC input and 24 VDC Input | |||
| VOLTAGE RANGE Note.2 | 12.5-84VDC | 12.5-72VDC | 12.5-50VDC | 12.5-36VDC |
| RATED POWER | 21W | 25.2W | 25W | 25.2W |
| CURRENT RIPPLE | 5%(@rated current) | |||
| INPUT | VOLTAGE RANGE Note.2 | 9.5-32VDC | ||
| EFFICIENCY (Typ•) | 91.5%/12V | I 94%/24V | I 92%/12V | I 95%/24V |
| 94%/24V 192.5%/12V I | 95.5%/24V | |||
| DC CURRENT (Typ.) | 2.5A/12VDC, 1 2A/24VDC | |||
| DIMMING | DIMMING FUNCTION Note.2 | Leave open if not used |
1KHz-3KHz 101/ PWM signal or 0.10V DC input
QUIESCENT INPUT CURRENT IN SHUTDOWN MODE(Typ.)| 7mA when PWM dimming OFF
@12VDC
PROTECTION| SHORT CIRCUIT| Output short circuit, the power supply will be
damaged
OVER VOLTAGE| 85-120V| 73-100V| 51-80V| 37-60V
NO LOAD| Output voltage rise to OVP, and drop equal to input voltage, re-power
to recovery
ENVIRONMENT| WORKING TEMP.| -40 – +70t (Refer to “berating Curve”)
WORKING HUMIDITY| 20 – 90% RH non-condensing
STORAGE TEMP., HUMIDITY| -40 – +85°C, 10 – 95% RH
TEMP. COEFFICIENT| ±0.03%/C (0 – 50t )
VIBRATION| 10 – 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z
axes
SAFETY & EMC| SAFETY STANDARDS| LVD BS EN/EN61347-1, BS EN/EN61347-2-13, EAC
TP TC 004 approved
EMC EMISSION Note.5| 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| 12369.5K hrs min. Telcordia TR/SR-332(Bellcore); 896.4Khrs min.
MIL-HDBK-217F (25°C )
DIMENSION| 52.427.224mm (LWH)
PACKING| Pin mounted style: 50g, 200pcs/11Kg/0.89CUFT; Lead wire style: 57g,
200pcs/12.4kg/0.98CUFT
NOTE| 1.All parameters are specified at normal input(12VDC), rated load, 25 C
70% RH ambient.
2.Non dimming application: Output voltage must step up by 3 Volts from input
DC voltage
Dimming application: Output voltage must be twice higher than the input DC
voltage
If input voltage down below 11V, the output current may drop to more than 80%
of the rated current
3.This series meets the typical life expectancy of >35,000 hours of operation
when Tcase, particularly tc point (or TMP, per DLC), is about 80°C or less.
4.The ambient temperature derating of 3.5’C/1000m with fanless models and of 5
C/1000m with fan models for operating altitude higher than 2000m(6500ft). 5.BS
EN/EN55015 EMI testing layout is based on DC input with a battery source
※ Product Liability Disclaimer : For detailed information, please refer to
https://www.meanwell.conVserviceDisdaimeraspx
| Pin No. | Comment |
|---|---|
| 1 | Vin+ |
| 2 | Vin- |
| 3 | Dim+ |
| 4 | Dim- |
| 5 | Vout- |
| 6 | Vout+ |
| Pin No. | Comment |
| --- | --- |
| 1 | Vin+(Red) |
| 2 | Vin-(Black) |
Don’t connect to Vout-
3| Dim+
(Blue)| 2 in 1 dimming
4| Dim-
(White)| 2 in 1 dimming
5| Vout(Black)| LED- connection
6| Vout+ (Red)| LED+ connection
Standard Application
※ 2 in 1 dimming function
-
Output constant current level can be adjusted by applying one of the three methodologies between DIM+ and DIM-:
0 ~ 10VDC, or 10V PWM signal -
Direct connecting to LEDs is suggested. It is not suitable to be used with additional drivers.
Note:
- Min.dimming level is about 8% and the output current is not defined when 0%＜lout＜8%.
- The output voltage is about equal to input voltage when dimming input is about 0Vdc,or 10V PWM signal with 0% duty cycle.
Application Notes:
- The positive and negative input terminals must be connected correctly and negative voltage can not be input to avoid damage to the power supply.
- Due to the large input current, please pay attention to the voltage drop of the wiring, to ensure the power supply to work properly.
- At dim off,LDH output voltage will drop to the same level as input voltage.To get luminaires complete dark, please make luminaires are light off when they are driving by the input voltage.
Application Notes of EMC
- If LDH-25 is powered by a battery, comply with BS EN/EN55015 without additional Input filter and capacitors.
- If LDH-25 is powered by DC Bus, additional EMC filter parts shall be added to meet BS EN/EN55015. The recommended circuit is shown in Figurel
Figure 1: Parameter description
C1| Electrolytic capacitor 100uF/35V
LF1| Common Mode Choke
11.5mH/Ring code(T16 x 12 x 8)/wire(0.6mm x 1)150 Turns (Mn-Zn Ferrite/ Li
i=10000 ± 30%/AL=4600nH/N2 )
File Name:LDH-25-SPEC 2022-02-18
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