Würth Elektronik LDHM series, of the MagI³C power modules family, are constant, buck, LED driver modules. The module drives a maximum load of 450 mA LED current and comprises a fully integrated current driver with passives, all in one package. The MagI³C LED driver module provides a ready-made solution that is both highly efficient and can be used for a variety of single-string LED lighting applications. It requires an input voltage from 4.5 V to 60 V and provides a preset LED current of 350 mA. The LED current is adjustable from 300 mA to 450 mA by loading a single external resistor. The energy efficiency is up to 95%.
The MagI³C LED driver module operates at a constant switching frequency of 800 kHz for low electromagnetic interference (EMI), and it is designed according to the standard EN55015. The module has a fast control loop to fine LED current, which is dissolved by 256 PWM steps at 240 Hz to implement for general lighting. Protection features include thermal shutdown, input under-voltage lockout, and LED open-circuit and short-circuit protection. The MagI³C LED driver module is designed as an industrial high power density package with a low profile and a small outline.
Application Notes
- ANS004 Input Filter for MagI³C Power Modules
- ANS006 Selecting and Designing with MagI³C Power Modules
- ANS007 Designing an Inverting Buck-Boost Converter with MagI³C Power Module
- DNS001 LED Driver with MagI³C Power Module
Features
- Peak efficiency up to 95%
- LED current capability: 300 mA to 450 mA
- Wide input voltage range: 4.5 V to 60 V
- Drives one to sixteen LEDs in a series with up to 60 V input
- Typical LED current accuracy ±3.5%
- Switching frequency fix at 800 kHz
- PWM dimming
- High contrast ratio (min. PWM current < 16 µs)
- Integrated magnetics solution for ease-of-use
- Single exposed pad for best thermal performance
- Connectable in parallel for higher-current operations
- Compatible with ceramic and low-ESR capacitors
- Input under-voltage lockout protection (UVLO)
- Temperature range: -40°C to 125°C
Characteristics
- Peak efficiency up to 95%
- PWM dimming possible using μController with 8-bit timer at 256 steps
- LED current capability: 300 mA – 450 mA
- Wide input voltage range: 4.5 V – 60 V
- Drives one to sixteen LEDs in a series up to 60 V
- Switching frequency fixed at 800 kHz
- High-contrast ration dimming
- Integrated power magnetics for ease-of-use
- Connectable in parallel for higher current operations
- Packaged in TO-263-7EP
- Constant on-time regulation (COT)
Applications
- Indoor lighting: spot light, down light
- Outdoor lighting: street light, security light, tunnel light
- Industrial lighting: high-bay light, low-bay light
