PM6600TR datasheet(1/43 Pages) STMICROELECTRONICS

Part #	PM6600TR

Description	6-row 32 mA LED driver with boost regulator for LCD panel backlight

PDF	43 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 43 page

April 2008

Rev 3

1/43

PM6600

6-row 32 mA LED driver with boost regulator

for LCD panel backlight

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

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 32 mA and they can be

dimmed via a PWM signal (1% dimming duty-

cycle 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.

VFQFPN-24 4x4

Table 1.

Device summary

Order codes

Package

Packaging

PM6600

VFQFPN-24 4x4 (exposed pad)

Tube

PM6600TR

Tape and reel

www.st.com

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