TPS92621-Q1中文资料德州仪器数据手册PDF规格书

1 Features

• AEC-Q100 qualified for automotive applications:

– Temperature grade 1: –40°C to 125°C, TA

• Wide input voltage range: 4.5 V to 40 V

• Thermal sharing by external shunt resistor

• Low supply current in fault mode

• Single high-precision current regulation:

– Up to 300-mA current output

– ±5 accuracy over full temperature range

– Current setting by resistor

– PWM pin for brightness control

• Low dropout voltage:

– Maximum dropout: 300mV for 150 mA

– Maximum dropout: 600mV for 300 mA

• Diagnostics and protection

– LED open-circuit with auto-recovery

– LED short-to-GND with auto-recovery

– Diagnostic enable with adjustable threshold

– Fault bus configurable as one-fails-all-fail

– Thermal shutdown

• Operation junction temperature range:–40°C to

150°C

2 Applications

• Automotive exterior rear light: rear lamp, center

high mounted stop lamp, side marker

• Automotive exterior small light: door handle, blind

spot detection indicator, charging inlet

• Automotive interior light: overhead console,

reading lamp

• General-purpose LED driver applications

3 Description

The TPS92621-Q1 single-channel LED driver

includes a unique thermal management design

to reduce temperature rising on the device. The

TPS92621-Q1 is a linear driver directly powered by

automotive batteries with large voltage variations to

output full current loads up to 300 mA. Shunt resistor

is leveraged to share output current and dissipate

power out of the driver. The device full-diagnostic

capabilities include LED open, LED short-to-GND

circuit, and device overtemperature protection.

The one-fails-all-fail feature of TPS92621-Q1 can

work together with other LED drivers, such as

the TPS9261x-Q1, TPS9262x-Q1, TPS9263x-Q1,

and TPS92830-Q1 devices, to address different

requirements.