LED driver. PM6602 Datasheet

PM6602 driver. Datasheet pdf. Equivalent

Part PM6602
Description 8-row 30-mA LED driver
Feature www.DataSheet4U.com PM6602 8-row 30-mA LED driver with boost regulator, dual dimming mode, SMBus in.
Manufacture ST Microelectronics
Datasheet
Download PM6602 Datasheet



PM6602
www.DataSheet4U.com
PM6602
8-row 30-mA LED driver with boost regulator, dual dimming mode,
SMBus interface and DPST for LCD panel backlights
Preliminary data
Features
2 dimming modes: SMBus or PWM
Boost section
– 3.3 V to 28 V input voltage range
– Internal power MOSFET
– Internal +3.3 V LDO for device supply
– Up to 36 V output voltage
– Constant frequency peak current mode
control
– 500 kHz to 2 MHz adjustable switching
frequency
– Pulse-skip power saving mode at light
loads
– Built-in soft-start feature
– Programmable OVP protection
– Stable with ceramic output capacitors
– Thermal shutdown
Backlight driver section
– 8 rows with 30 mA maximum current
capability (adjustable)
– Row disabling option
– 500 ns minimum dimming time (1%
minimum dimming duty-cycle at 20 kHz)
– ±3% current accuracy
– ±2% current balance
– LED failure (open and short circuit)
detection
VFQFPN-24 4x4
AM03692v1
Description
The PM6602 consists of a high-efficiency
monolithic boost converter and eight controlled
current generators (ROWs), specifically designed
to supply LED arrays used in the backlights of
LCD panels. The device can manage a nominal
output voltage of up to 36 V. The generators can
be externally programmed to sink up to 30 mA
and they can be dimmed in two different modes:
via a PWM signal (1% dimming duty-cycle at 20
kHz can be managed) or in SMBus mode. The
device can detect and manage the open and
shorted LED faults. The device detects the
unused ROWs (connected to SGND). Basic
protections (output overvoltage, internal MOSFET
overcurrent and thermal shutdown) are provided.
Applications
Backlights of notebook monitors
Backlights of UMPC monitors
Table 1. Device summary
Part number
Package
PM6602
PM6602TR
VFQFPN-24 4 mm x 4 mm (exposed pad)
Packaging
Tube
Tape and reel
June 2009
Doc ID 15564 Rev 1
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
1/20
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PM6602
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Contents
PM6602
1 Typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Device pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 SMBus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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