LDD-1200LW — Constant-current DC/DC LED driver
MEAN WELL LDD-1200LW is a 1200 mA constant-current DC/DC step-down LED driver in wire style. The manufacturer’s general catalog lists 6–36 VDC input, a 2–30 VDC LED output window, and PWM plus analog dimming with remote on/off.
Download MEAN WELL LDD-L Selection Guide (PDF)Download MEAN WELL LDD-L Current Series Reference (PDF)Selection data for this exact variant are in the first link: PDF page 71 (printed page 68), which lists L, LW and LS versions. The second link is the current series reference; its 2024 detailed specification table does not cover this complete SKU. Use a connection drawing and any additional electrical limits confirmed for the supplied model.
Output and input specifications
| Parameter |
Details |
| Complete model / construction |
LDD-1200LW; LDD-L series. W suffix = wire style. |
| Constant output current |
1200 mA. Select an LED module with a compatible current rating. |
| LED output-voltage window |
2–30 VDC. This is a step-down converter; choose an input above the required LED string voltage and verify the necessary voltage margin for the supplied model. |
| DC input range |
6–36 VDC. |
| Typical current accuracy |
±5% at 24 VDC input. |
| Maximum efficiency |
95% is listed in the manufacturer’s selection table. Confirm efficiency at the intended operating point. |
Dimming and control
| Parameter |
Details |
| Control reference |
Control voltages are measured between DIM and −Vin. Leave DIM open when it is not used. |
| PWM dimming and on/off |
PWM frequency: 100–500 Hz. A high level above 2.6 V and up to 5.5 V, or an open DIM input, enables output. A level below 0.4 V or a short to −Vin turns output off. |
| Analog dimming and on/off |
Analog dimming is provided over 0.5–2.5 VDC between DIM and −Vin. The catalog specifies power-on dimming above 0.5 V up to 2.5 V or with DIM open; below 0.4 V or shorted to −Vin turns output off. |
Protection and operating limits
| Parameter |
Details |
| Short-circuit protection |
Output is regulated at rated current; the short-circuit condition can be sustained, with automatic recovery after the fault is removed. |
| Overtemperature protection |
The manufacturer’s general-catalog column for LDD-1000–1500L/LW/LS lists no overtemperature protection. |
| Operating temperature |
−40°C to +71°C, subject to the supplied model’s operating conditions. Keep the case at or below its separate limit; this range does not establish an unqualified full-load thermal curve. |
| Maximum operating case temperature |
100°C. |
Dimensions and integration
| Parameter |
Details |
| Dimensions |
31.8 × 20.3 × 12.2 mm (L × W × H). |
| Connection drawing |
Use the manufacturer’s connection and mechanical drawing for this exact wire-style model. Verify pin assignments or lead functions, polarity and control reference before wiring; do not substitute a different construction’s pin or wire map. |
| Detailed integration data |
Confirm model-specific lead or pin details, thermal derating and electrical limits not listed in the general catalog before incorporating this driver into equipment. |
Standards and reference information
| Parameter |
Details |
| Standards reference |
The manufacturer’s general catalog lists EAC TP TC 004 approval and the EMC references EN 55015, EN 61547, EN 61000-4-2, -3, -4, -6 and -8, FCC Part 15 Class B and EAC TP TC 020. Confirm the certification applicable to the supplied revision; the separate LDD specification document uses a different EAC entry. |
