ALED7707TR ST LED Lighting Drivers 6-row 85 mA LEDs driver boost regulator for LCD panel backlights

ALED7707TR ST LED Lighting Drivers 6-row 85 mA LEDs driver boost regulator for LCD panel backlights

1.Features
•AEC-Q100 qualification
•Boost section
– 4.5 V to 36 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
– 250 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 85 mA maximum currentcapability (adjustable)
– Rows disable option
– Less than 10 μs minimum dimming on-time
– ± 3% current matching between rows
– LED failure (open and short-circuit)detection

2.Applications
•Infotainment LCD backlight
•Daytime running lights
•Car interior/exterior lights
•Dashboard backlight

3.Description
The ALED7707 device consists of an automotivegrade (AEC Q100 compliant) monolithic boostconverter and six controlled current generators(rows) specifically designed to supply LED arraysused in the backlighting of LCD panels. Thedevice can manage an output voltage up to 36 V(i.e.: 10 white LEDs per row).
The generators can be externally programmed tosink up to 85 mA and can be dimmed via a PWMsignal (1% dimming duty cycle at 1 kHz can bemanaged). The device allows the open and shorted LED faults to be detected andmanaged and unused rows to be let floating. Basic protections (outputovervoltage, internal MOSFET overcurrent andthermal shutdown) are provided

4.Typical application circuit

5.Pin connection

6.Pin description