Description

The PM6600 consists of a high efficiency monolithic boost converter and six controlled current generators (ROWs), specifically designed to supply LEDs arrays used in the backlight of LCD panels. The device can manage a nominal output voltage up to 36 V (i.e. 10 White-LEDs per ROW).

Features

■ Boost section

– 4.7 V to 28 V input voltage range

– Internal power MOSFET

– Internal +5 V LDO for device supply

– Up to 36 V output voltage

– Constant frequency peak current-mode control

– 200 kHz to 1 MHz adjustable switching frequency

– External synchronization for multi-device application

– Pulse-skip power saving mode at light load

– Programmable soft-start

– Programmable OVP protection

– Stable with ceramic output capacitors

– Thermal shutdown

■ Backlight driver section

– Six rows with 32 mA maximum current capability (adjustable)

– Up to 10 WLEDs per row

– Unused rows detection

– 500 ns minimum dimming time (1 minimum dimming duty-cycle at 20 kHz)

– ±2.1 current accuracy

– ±2 current matching between rows

– LED failure (open and short circuit) detection

Applications

■ Notebook monitors backlight

■ UMPC backlight