Date: 27/05/2010

LED driver controller IC by Diodes Inc for HB LED lamps

Diodes Incorporated has released the ZXLD1370 LED driver controller, a multi-topology LED driver IC, which it claims is designed to increase the reliability of high brightness lamps in automotive, industrial, and commercial lighting systems. The driver controller operates in buck, boost, and buck-boost modes. It combines control loops and high-side current sensing to provide accurate current control of LED strings.

The ZXLD1370 operates at an input voltage range of 6V to 60V with a 1% output current tolerance in all topologies. DI says the driver is capable of delivering the high current levels and tight inter-lamp luminance-matching required by high brightness LED systems. It provides LED thermal management by using external thermistor input and by fault diagnosis outputs that report the status of LED driver and load. The ZXLD1370 LED driver controller uses an external MOSFET, which DI says can provides a single driver solution capable of supporting a very wide range of LED configurations and current requirements. It also provides DC dimming and PWM dimming options and also has a PWM input that is said to offer the driver a 1000:1 dynamic dimming range at 1 kHz, thus allowing control of color mixing and good resolution at low brightness levels. The device has switching frequency capability of 1 MHz with 100 kHz low frequency clamp thus reducing the size of the external inductor

For more information visit: www.diodes.com.