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《TI-TPS92622-Q1：汽车级双通道高侧LED驱动器的特性和应用》 TI公司的TPS92622-Q1是一款专为汽车应用设计的双通道高侧LED驱动器，具备独特的热管理功能，能够有效降低器件的工作温度。这款驱动器在宽输入电压范围内（4.5 V至40 V）工作，适用于汽车电池供电，即使电压波动大也能保证输出最大150 mA的电流负载。其特点和优势主要体现在以下几个方面： 1. **AEC-Q100认证**：TPS92622-Q1符合汽车行业的AEC-Q100标准，能够在恶劣的环境条件下稳定工作，适用的温度范围为-40°C到125°C。 2. **热共享技术**：通过外部串联电阻实现热共享，帮助分散功耗，提高系统的热效率。 3. **低待机电流**：在故障模式下，驱动器的供应电流保持较低，降低了功耗。 4. **高精度电流调节**：每个通道可独立设置电流，最大可达150mA，且在整个温度范围内精度保持在±5%，确保了LED亮度的一致性。此外，还可以通过外部电阻独立设定电流，并通过独立的PWM引脚控制亮度。 5. **低降压电压**：在150mA负载时，最大降压仅为350mV，保证了驱动效率。 6. **全面的诊断和保护功能**：包括LED开路检测、LED接地短路检测以及自动恢复功能，同时具有可调整阈值的诊断使能。故障总线可以配置为一种故障所有通道关闭或仅关闭故障通道（N-1）的方式，提供灵活的故障响应策略。另外，还包括过温保护，确保了设备的安全运行。 7. **操作结温范围**：TPS92622-Q1能在-40°C到150°C的结温范围内正常工作，满足汽车内部和外部照明的严格温度需求。 8. **应用广泛**：适用于汽车的后灯（如尾灯、中心高位刹车灯、侧标志灯）、小型外部灯（如门把手灯、盲点检测指示灯、充电接口）、车内照明（如头顶控制台灯、阅读灯）以及其他通用LED驱动应用。 9. **封装信息**：该驱动器提供两种封装选择，即DGN（HVSSOP，12引脚）和DRR（WSON，12引脚），尺寸分别为3.00mm x 4.00mm和3.00mm x 3.00mm，以适应不同的电路板布局需求。 TI的TPS92622-Q1是汽车照明系统中的理想选择，它结合了高效能、高精度和全面的保护功能，确保了LED照明系统的可靠性和稳定性。同时，其兼容性良好，能与其他TI的LED驱动器如TPS9261x-Q1、TPS9262x-Q1、TPS9263x-Q1和TPS92830-Q1等配合使用，满足各种设计需求。

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TPS92622-Q1 Two-Channel, Automotive, High Side LED Driver with Thermal Sharing

1 Features

• AEC-Q100 qualified for automotive applications:

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

• 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 150-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: 350 mV for 150 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 TPS92622-Q1 two-channel LED driver includes

a unique thermal management design to reduce

temperature rising on the device. The TPS92622-Q1

is a linear driver directly powered by automotive

batteries with large voltage variations to output full

current loads up to 150 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 TPS92622-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.

Package Information

PART NUMBER PACKAGE

(1)

BODY SIZE (NOM)

TPS92622-Q1

DGN (HVSSOP, 12)

(2)

3.00 mm × 4.00 mm

DRR (WSON, 12) 3.00 mm × 3.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

(2) Product preview.

IN1

IN2

PWM1

PWM2

RES1

OUT1

RES2

OUT2

SUPPLY

DIAGEN

GND

TPS92622-Q1

4.5 V to 40 V

(SNS1)

(SNS2)

(SUPPLY)

(RES1)

(RES2)

(OUT1)

(OUT2)

FAULT

Typical Application Diagram

Supply Voltage (V)

Power (W) 150mA/Channel

3 6 9 12 15 18 21 24 27 30

0.5

1.5

2.5

(DEVICE)

(RESx)

= 55  2LEDs

(RESx)

= 55  2LEDs

(DEVICE)

(RESx)

= 55  3LEDs

(RESx)

= 55  3LEDs

Power Dissipation on Device

TPS92622-Q1

SLVSGW4 – NOVEMBER 2022

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.

Table of Contents

1 Features............................................................................1

2 Applications..................................................................... 1

3 Description.......................................................................1

4 Revision History.............................................................. 2

5 Pin Configuration and Functions...................................3

6 Specifications.................................................................. 4

6.1 Absolute Maximum Ratings........................................ 4

6.2 ESD Ratings............................................................... 4

6.3 Recommended Operating Conditions.........................4

6.4 Thermal Information....................................................4

6.5 Electrical Characteristics.............................................5

6.6 Typical Characteristics................................................ 7

7 Detailed Description...................................................... 11

7.1 Overview................................................................... 11

7.2 Functional Block Diagram......................................... 11

7.3 Feature Description...................................................11

7.4 Device Functional Modes..........................................21

8 Application and Implementation.................................. 22

8.1 Application Information............................................. 22

8.2 Typical Applications.................................................. 22

8.3 Power Supply Recommendations.............................26

8.4 Layout....................................................................... 26

9 Device and Documentation Support............................28

9.1 Receiving Notification of Documentation Updates....28

9.2 Support Resources................................................... 28

9.3 Trademarks............................................................... 28

9.4 Electrostatic Discharge Caution................................28

9.5 Glossary....................................................................28

10 Mechanical, Packaging, and Orderable

Information.................................................................... 29

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

DATE REVISION NOTES

November 2022 * Initial release.

TPS92622-Q1

SLVSGW4 – NOVEMBER 2022

www.ti.com

2 Submit Document Feedback

Product Folder Links: TPS92622-Q1

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)

(1)

MIN MAX UNIT

Supply SUPPLY –0.3 45 V

High-voltage input DIAGEN, IN1, IN2, PWM1, PWM2 –0.3 V

(SUPPLY)

+ 0.3 V

High-voltage output OUT1, OUT2, RES1, RES2 –0.3 V

(SUPPLY)

+ 0.3 V

Fault bus FAULT –0.3 V

(SUPPLY)

+ 0.3 V

Operating junction temperature –40 150 °C

stg

Storage temperature –40 150 °C

(1) Operation outside the Absolute Maximum Ratings may cause permanent device damage. Absolute Maximum Ratings do not imply

functional operation of the device at these or any other conditions beyond those listed under Recommended Operating Conditions.

If used outside the Recommended Operating Conditions but within the Absolute Maximum Ratings, the device may not be fully

functional, and this may affect device reliability, functionality, performance, and shorten the device lifetime.

6.2 ESD Ratings

VALUE UNIT

(ESD)

Electrostatic discharge

Human-body model (HBM), per AEC Q100-002

(1)

HBM ESD Classification Level 1C

±2000

Charged-device model (CDM), per AEC

Q100-011

CDM ESD Classification Level C4B

All pins ±500

Corner pins (SUPPLY, RES1,

FAULT, PWM2)

±750

(1) AEC Q100-002 indicates that HBM stressing shall be in accordance with the ANSI/ESDA/JEDEC JS-001 specification.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

MIN NOM MAX UNIT

SUPPLY Device supply voltage 4.5 40 V

IN1, IN2 Sense voltage V

(SUPPLY)

- V

(CS_REG)

PWM1, PWM2 PWM inputs 0 V

(SUPPLY)

DIAGEN Diagnostics enable pin 0 V

(SUPPLY)

OUT1, OUT2, RES1,

RES2

Driver output 0 V

(SUPPLY)

FAULT Fault bus 0 V

(SUPPLY)

Operating ambient temperature, T

–40 125 °C

6.4 Thermal Information

THERMAL METRIC

(1)

TPS92622-Q1

UNITDRR (WSON) DGN (HVSSOP)

12 PINS 12 PINS

θJA

Junction-to-ambient thermal resistance 51.2 39.7 °C/W

θJC(top)

Junction-to-case (top) thermal resistance 50.7 60.9 °C/W

θJB

Junction-to-board thermal resistance 25.2 15.5 °C/W

Junction-to-top characterization parameter 1.3 2.6 °C/W

Junction-to-board characterization parameter 25.2 15.5 °C/W

θJC(bot)

Junction-to-case (bottom) thermal resistance 9.4 2.6 °C/W

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC package thermal metrics application

report.

TPS92622-Q1

SLVSGW4 – NOVEMBER 2022

www.ti.com

4 Submit Document Feedback

Product Folder Links: TPS92622-Q1

6.5 Electrical Characteristics

(SUPPLY)

= 5 V to 40 V, T

= –40°C to +150°C unless otherwise noted

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

BIAS

(POR_rising)

Supply voltage POR rising threshold 3.6 4.0 V

(POR_falling)

Supply voltage POR falling threshold 3.0 3.4 V

(Quiescent)

Device standby ground current PWM = HIGH 1.2 1.6 mA

(FAULT)

Device supply current in fault mode PWM = HIGH, FAULT externally pulled LOW 0.21 0.32 0.45 mA

LOGIC INPUTS (DIAGEN, PWM)

IL(DIAGEN)

Input logic-low voltage, DIAGEN 1.045 1.1 1.155 V

IH(DIAGEN)

Input logic-high voltage, DIAGEN 1.14 1.2 1.26 V

IL(PWM)

Input logic-low voltage, PWM 1.045 1.1 1.155 V

IH(PWM)

Input logic-high voltage, PWM 1.14 1.2 1.26 V

CONSTANT-CURRENT DRIVER

(OUTx_Tot)

Device output-current for each channel 100% duty cycle 5 150 mA

(CS_REG)

Sense-resistor regulation voltage T

= –40°C to +125°C 144 150 156 mV

ALL ΔV

(CS_c2c)

Channel to channel mismatch ΔV

(CS_c2c)

= 1 – V

(CS_REGx)

/ V

avg(CS_REG)

–3 +3 %

ALL ΔV

(CS_d2d)

Device to device mismatch ΔV

(CS_d2d)

= 1 – V

avg(CS_REG)

/ V

nom(CS_REG)

–4 +4 %

(CS_REG)

Sense-resistor range 0.96 31.2 Ω

(DROPOUT)

Voltage dropout from INx to OUTx, RESx open

current setting of 100 mA 120 250 mV

current setting of 150 mA 180 350 mV

Voltage dropout from INx to RESx, OUTx open

current setting of 100 mA 230 450 mV

current setting of 150 mA 350 700 mV

(RESx)

Ratio of RESx current to total current

(RESx)

(OUTx_Tot)

, V

(INx)

– V

(RESx)

> 1 V,

Itotal=150mA

95 %

DIAGNOSTICS

(OPEN_th_rising)

LED open rising threshold, V

(IN)

– V

(OUT)

180 300 420 mV

(OPEN_th_falling)

LED open falling threshold, V

(IN)

– V

(OUT)

450 mV

(SG_th_rising)

Channel output short-to-ground rising threshold 1.14 1.2 1.26 V

(SG_th_falling)

Channel output short-to-ground falling threshold 0.855 0.9 0.945 V

(Retry_OUTx)

Channel output V

(OUT)

short-to-ground retry

current

0.64 1.14 1.528 mA

(Retry_RESx)

Channel output V

(RES)

short-to-ground retry

current

0.64 1.14 1.528 mA

FAULT

IL(FAULT)

Logic input low threshold 0.7 V

IH(FAULT)

Logic input high threshold 2 V

(FAULT_rising)

Fault detection rising edge deglitch time 10 µs

(FAULT_falling)

Fault detection falling edge deglitch time 20 µs

(FAULT_pulldown)

FAULT internal pulldown current V

(FAULT)

= 0.4 V 2 3 4 mA

(FAULT_pullup)

FAULT internal pullup current 6 10 14 µA

(FAULT_leakage)

FAULT leakage current V

(FAULT)

= 40 V 0.01 2 µA

TIMING

(PWM_delay_rising)

PWM rising edge delay to 10% of output

current, t

as shown in Figure 7-1

(SUPPLY)

= 12 V, V

(OUT)

= 6 V, V

(CS_REG)

= 150

mV, R

(SNSx)

= 1 Ω, and R

(RESx)

= 68 Ω

3.7 µs

(SUPPLY)

= 12 V, V

(OUT)

= 6 V, V

(CS_REG)

= 150

mV, R

(SNSx)

= 30 Ω and R

(RESx)

= 56 Ω

2.2 µs

(PWM_delay_falling)

PWM falling edge delay to 90% of output

current, t

as shown in Figure 7-1

(SUPPLY)

= 12 V, V

(OUT)

= 6 V, V

(CS_REG)

= 150

mV, R

(SNSx)

= 1 Ω, and R

(RESx)

= 68 Ω

4.0 µs

(SUPPLY)

= 12 V, V

(OUT)

= 6 V, V

(CS_REG)

= 150

mV, R

(SNSx)

= 30 Ω and R

(RESx)

= 56 Ω

3.6 µs

www.ti.com

TPS92622-Q1

SLVSGW4 – NOVEMBER 2022

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