PM6600

PM6600 6-rows 30 mA LEDs driver with boost regulator for LCD panels backlight Features Boost section www.DataSheet4U.com – 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 ■ ■ VFQFPN-24 4x4 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). The generators can be externally programmed to sink up to 30 mA and they can be dimmed via a PWM signal (1% dimming dutycycle at 20 kHz can be managed). The device allows to detect and manage the open and shorted LED faults and to let unused ROWs floating. Basic protections (Output Over-Voltage, internal MOSFET Over-Current and Thermal Shutdown) are provided. Backlight driver section – Six rows with 30 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 bet...