STEVAL-ISA056V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – 6 rows - 30 mA LEDs driver with boost converter for LCD panels backlight evaluation board based on the PM6600

STEVAL-ISA056V1
6 rows - 30 mA LEDs driver with boost converter for LCD panels
backlight evaluation board based on the PM6600
Data Brief
Features
■ Boost section
– 4.5 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 ctrl
– 200 kHz to 1 MHz adjustable switching
frequency
– External sync for multi-device application
– Pulse-skip power saving mode at light load
– Programmable soft-start
– Programmable OVP protection
– Single ceramic output capacitor
– Latched thermal shutdown
■ Backlight driver section
– Six rows with 30mA maximum current
capability (adjustable)
– Up to 10 W LEDs per row
– Rows disable option
– Less than 500 ns minimum dimming time
(1% minimum dimming duty-cycle at 20
kHz dimming frequency)
– ±2.0% current matching between rows
– LED failure (open and short circuit)
detection
STEVAL-ISA056V1
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.
Description
This evaluation board based on 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 an output voltage up to 36 V
(i.e. ten white-LEDs per row).
The generators can be externally programmed to
sink up to 30 mA and can be dimmed via a PWM
signal (1% dimming duty-cycle at 20 kHz can be
March 2008
Rev 1
For further information contact your local STMicroelectronics sales office.
1/4
www.st.com
4