TPS929121-Q1
SLVSFZ4A – DECEMBER 2020 – REVISETDPFESB9R2U9A1R2Y12-Q0211
SLVSFZ4A – DECEMBER 2020 – REVISED FEBRUARY 2021
www.ti.com
TPS929121-Q1 12-Channel Automotive 40-V High-Side LED Driver With FlexWire
1 Features
2 Applications
•
AEC-Q100-qualified for automotive applications:
– Temperature grade 1: –40°C to +125°C, TA
12-channel precision high-side current output:
– Supply voltage 4.5 V to 40 V
•
•
•
•
Automotive exterior rear light
Automotive exterior headlight
Automotive interior ambient light
Automotive cluster display
•
– Up to 75-mA channel current set by resistor
– 2-bit global, 6-bit independent current setting
– High current accuracy < ±5% at 5 mA to 75 mA
– High current accuracy < ±10% at 1 mA
– Low voltage drop 500 mV at 50 mA
– 12-bit independent PWM dimming
– Programmable PWM frequency up to 20 kHz
– Linear and exponential dimming method
FlexWire control interface
3 Description
With increasing demand for animation in automotive
lighting, LEDs must be controlled independently.
Therefore, LED drivers with digital interfaces are
essential to effectively drive pixel-controlled lighting
applications. In exterior lighting, multiple lamp
functions are typically located on different PCB boards
with off-board wires connected to each other. It is
difficult for a traditional single-ended interface to meet
the strict EMC requirements. By using an industrial-
standard CAN physical layer, the UART-based
FlexWire interface of the TPS929121-Q1 easily
accomplishes long distance off-board communication
without impacting EMC.
•
•
– Up to 1-MHz clock frequency
– Maximum 16 devices on one FlexWire bus
– Up to 8-bytes data transaction in one frame
– 5-V LDO output to supply CAN transceiver
Diagnostic and protection:
The TPS929121-Q1 is a 12-channel, 40-V high-side
LED driver that controls the 8-bit output current and
12-bit PWM duty cycles. The device meets multiple
regulation requirements with LED open-circuit, short-
to-ground, and single LED short-circuit diagnostics. A
configurable watchdog also automatically sets fail-
safe states when the MCU connection is lost, and,
with programmable EEPROM, TPS929121-Q1 can
flexibly be set for different application scenarios.
– Programmable fail-safe state
– LED open-circuit detection
– LED short-circuit detection
– Single-LED short-circuit diagnostic
– Programmable low-supply detection
– Open-drain ERR for fault indication
– Watchdog and CRC for FlexWire interface
– 8-Bit ADC for pin voltage measurement
– Overtemperature protection
Device Information (1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS929121-Q1
HTSSOP (24)
7.80 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
TPS929121-Q1
RX
VLDO
GND
TX
OUT11
OUT10
OUT9
OUT8
OUT7
OUT6
OUT5
OUT4
OUT3
OUT2
OUT1
OUT0
RX
CANH
CANL
CAN
Transceiver
(optional)
TX
ERR
SUPPLY
SUPPLY
FS
ADDR2/CLK
ADDR1/PWM1
ADDR0/PWM0
REF
GND
Typical Application Diagram
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
Product Folder Links: TPS929121-Q1
Copyright © 2021 Texas Instruments Incorporated
Submit Document Feedback
1
5秒后页面跳转
pcf8563芯片功能说明、参数分析、引脚说明
TDA2822资料手册：引脚说明、参数分析
TJA1050资料数据分析、引脚说明、应用示例介绍
DS3231时钟芯片：参数分析、引脚说明、应用示例介绍
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
