TPS92620-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

• Two high-precision current regulation:

– Up to 250-mA current output for each channel

– ±5 accuracy over full temperature range

– Independent current setting by resistor

– Independent PWM pin for brightness control

• Low dropout voltage:

– Maximum dropout: 600 mV for 250 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 either one-fails–all-fail

or only-failed-channel off (N-1)

– 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 TPS92620-Q1 two-channel LED driver includes

a unique thermal management design to reduce

temperature rising on the device. The TPS92620-Q1

is a linear driver directly powered by automotive

batteries with large voltage variations to output full

current loads up to 250 mA per channel. External

shunt resistors are 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 TPS92620-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.