TPS92629-Q1中文資料德州儀器數(shù)據(jù)手冊(cè)PDF規(guī)格書

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 quiescent current

– 10 uA with EN low in shutdown mode

– Low supply current in fault mode

? Single-channel high-precision current regulation:

– Up to 250-mA output channel current

– Integrated analog dimming and PWM dimming

control

– ±5 accuracy under PWM dimming mode over

full temperature range

– ±5 accuracy under analog dimming mode

for 20~100 maximum current over full

temperature range

– ±10 accuracy under analog dimming mode

for 10~20 maximum current over full

temperature range

? Low dropout voltage:

– Maximum dropout: 350 mV for 150 mA

– Maximum dropout: 500 mV for 250 mA

? Diagnostics and protection

– LED open-circuit with auto-recovery

– LED short-to-GND with auto-recovery

– LED short-to-battery with auto-recovery

– Diagnostic enable with adjustable threshold for

low-dropout operation

– More safe system with multiple fault report

capability

– Thermal shutdown

? Operation junction temperature range: –40°C to

150°C

2 Applications

? Automotive exterior small light: blind spot detection

indicator, door handle, charging inlet

? Automotive interior light: overhead console,

reading lamp

? Automotive exterior rear light: rear lamp, center

high mounted stop lamp, side marker

? General-purpose LED driver applications

3 Description

The TPS92629-Q1 single-channel LED driver

includes a unique thermal management design

to reduce temperature rising on the device. The

TPS92629-Q1 is a linear driver directly powered by

automotive batteries with large voltage variations to

output full current loads up to 250 mA. External

shunt resistors are leveraged to share output current

and dissipate power out of the driver. The device's

full-diagnostic capabilities include LED open, LED

short-to-GND, LED short-to-battery circuit and device

overtemperature protection. The high accuracy and

optimized slew rate of analog dimming control

supports off board long wire driving with enhanced

EMC performance and eliminates the flick and

afterimage issue. The multiple fault could be reported

out by different voltage levels through fault pins for

safety critical applications.