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LDHM Series MagI³C Power Modules

Würth Elektronik introduces its LDHM series, of the MagI³C power modules family, in a TO-263 package

Image of Wurth Electronics' LDHM Modules TO-263 PackageWürth 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

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

LDHM Modules TO-263 Package

ImageManufacturer Part NumberDescriptionTypeTopologyAvailable QuantityView Details
LED STEP DOWN HIGH CURRENT MODUL172946001LED STEP DOWN HIGH CURRENT MODULConstant CurrentBuck475 - ImmediateView Details
EVAL BOARD178946001EVAL BOARD450mA1, Non-Isolated2 - ImmediateView Details

ABC of Power Modules Design Guide

ImageManufacturer Part NumberDescriptionTypeTitleAuthor(s)Available QuantityView Details
ABC OF POWER MODULES AT APEC744016ABC OF POWER MODULES AT APECBookABC of Power ModulesSteffen Wolf, Ralf Regenhold, Jan Stephan7 - ImmediateView Details
Published: 2015-03-11