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TPS92638-Q1

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Automotive 8-channel Linear LED driver with PWM dimming

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TPS92624-Q1 ACTIVE Automotive four-channel high-side LED driver with thermal sharing Contains 4 channels instead of 8, but features thermal sharing to distribute heat with external resistor.

TPS92638-Q1

ACTIVE
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Product details

Number of channels 8 Topology Current Source Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125 Vin (min) (V) 5 Vin (max) (V) 40 Vout (min) (V) 0 Vout (max) (V) 40 Iout (max) (A) 0.56 Iq (typ) (mA) 0.6 Features Enable/Shutdown, Fault Detection, Fault Diagnostic, LED Open Detection, LED Short to Ground Detection, Thermal Foldback, Thermal shutdown
Number of channels 8 Topology Current Source Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125 Vin (min) (V) 5 Vin (max) (V) 40 Vout (min) (V) 0 Vout (max) (V) 40 Iout (max) (A) 0.56 Iq (typ) (mA) 0.6 Features Enable/Shutdown, Fault Detection, Fault Diagnostic, LED Open Detection, LED Short to Ground Detection, Thermal Foldback, Thermal shutdown
HTSSOP (PWP) 20 41.6 mm² (6.5 mm × 6.4 mm)
  • Qualified for Automotive Applications
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C3B
  • Functional safety capable
    • Documentation available to aid functional safety system design
  • 8-Channel LED Driver With Analog and PWM Dimming
  • Wide Input-Voltage Range: 5 V–40 V
  • Adjustable Constant Output Current Set by Reference Resistor
    • Maximum Current: 70 mA per Channel
    • Maximum Current: 560 mA in Parallel Operation Mode
    • Accuracy: ±3% per Channel
    • Accuracy: ±4% per Device
  • PWM Dimming Input (PWM)
    • Turn ON/OFF Delay Time: 25 µs (typ.), 45 µs (max.)
  • 4-Bank PWM Dimming to Control 8 Channels
  • Open- and Shorted-LED Detection With Deglitch
  • Fault Pin for Open, Short, and Thermal-Shutdown Failure Reporting, Allowing Parallel Bus Connection of up to 15 Devices
  • Temperature-Current Foldback to Prevent Thermal Shutdown, With Programmable Threshold
  • Single Resistor for Stop-Current Set Point
  • Single Resistor for Tail-Current Set Point
  • Operating Junction Temperature Range –40°C to 150°C
  • Package: 20-Pin Thermally Enhanced PWP Package (PDSO)
  • Qualified for Automotive Applications
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C3B
  • Functional safety capable
    • Documentation available to aid functional safety system design
  • 8-Channel LED Driver With Analog and PWM Dimming
  • Wide Input-Voltage Range: 5 V–40 V
  • Adjustable Constant Output Current Set by Reference Resistor
    • Maximum Current: 70 mA per Channel
    • Maximum Current: 560 mA in Parallel Operation Mode
    • Accuracy: ±3% per Channel
    • Accuracy: ±4% per Device
  • PWM Dimming Input (PWM)
    • Turn ON/OFF Delay Time: 25 µs (typ.), 45 µs (max.)
  • 4-Bank PWM Dimming to Control 8 Channels
  • Open- and Shorted-LED Detection With Deglitch
  • Fault Pin for Open, Short, and Thermal-Shutdown Failure Reporting, Allowing Parallel Bus Connection of up to 15 Devices
  • Temperature-Current Foldback to Prevent Thermal Shutdown, With Programmable Threshold
  • Single Resistor for Stop-Current Set Point
  • Single Resistor for Tail-Current Set Point
  • Operating Junction Temperature Range –40°C to 150°C
  • Package: 20-Pin Thermally Enhanced PWP Package (PDSO)

The TPS92638-Q1 is an eight-channel linear LED driver with PWM dimming control. Its design is ideal for driving multiple strings of LEDs up to a medium power range.

This device can drive up to eight strings with one to three LEDs in each string, at a total current up to 70 mA per channel. Outputs can be in parallel to provide higher-current drive up to 560 mA.

In multiple-string applications, the device offers the advantage of having common-cathode connection of the LED stings. So, there is only a single return wire needed instead of one per LED string that a system with low-side current sense would need.

The device has the capability for switching LED current between high current and low current for stop and tail applications. Two reference resistors set the two LED current levels from each output.

The included temperature monitor reduces the LED drive current if the IC junction temperature exceeds a thermal threshold. The temperature threshold is programmable through an external resistor. One can disable the thermal current-monitor feature by connecting the TEMP pin to ground. Output of the junction temperature as an analog voltage is available as a factory program option.

The TPS92638-Q1 is an eight-channel linear LED driver with PWM dimming control. Its design is ideal for driving multiple strings of LEDs up to a medium power range.

This device can drive up to eight strings with one to three LEDs in each string, at a total current up to 70 mA per channel. Outputs can be in parallel to provide higher-current drive up to 560 mA.

In multiple-string applications, the device offers the advantage of having common-cathode connection of the LED stings. So, there is only a single return wire needed instead of one per LED string that a system with low-side current sense would need.

The device has the capability for switching LED current between high current and low current for stop and tail applications. Two reference resistors set the two LED current levels from each output.

The included temperature monitor reduces the LED drive current if the IC junction temperature exceeds a thermal threshold. The temperature threshold is programmable through an external resistor. One can disable the thermal current-monitor feature by connecting the TEMP pin to ground. Output of the junction temperature as an analog voltage is available as a factory program option.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet TPS92638-Q1 8-Channel Linear LED Driver With PWM Dimming datasheet (Rev. C) PDF | HTML Jan 15, 2020
Application note Typical Design Guidelines for TPS92630/8-Q1 in Automotive Rear Lamp Applications PDF | HTML Sep 1, 2020
Functional safety information Streamlining Functional Safety Certification in Automotive and Industrial Jun 9, 2020
Technical article Always make the right turn: how to design fault circuits in automotive lighting sy PDF | HTML Jan 16, 2020
Functional safety information TPS92638-Q1 Functional Safety FIT Rate and Failure Mode Distribution Jan 6, 2020
White paper Trends and topologies for automotive rear lighting systems (Rev. A) Sep 23, 2019
Technical article How to overcome size, EMI and thermal challenges of automotive LED lighting PDF | HTML Apr 9, 2018
White paper LED Drivers for Automotive Exterior Applications (Rev. B) Mar 27, 2018
Design guide EMC Compatible Automotive LED Rear Lamp Sequential-Turn Animation Design Guide Jun 2, 2016
Application note How to Calculate TPS92630-Q1 Maximum Output Current for Automotive Exterior Ligh Dec 22, 2015

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS92638EVM — TPS92638 Eight Channels linear LED driver EVM

Texas Instruments TPS92638 evaluation module contains a TPS92638 integrated circuit (IC), supporting passive components and three OSRAM LEDs in series per channel, the EVM includes 8 channels. The purpose of this EVM is to facilitate evaluation of the TPS92638 in a typical LED application.

User guide: PDF
Supported products & hardware
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Evaluation board

TPS92638STAEVM — EMC Compatible Automotive LED Rear Lamp With Sequential Turn Animation Evaluation Module

This design is an analog solution for automotive rear lamps with sequential turn animations. This design is compatible with the TL81000 RI and the BCI test in a third-party EMC lab. This design also illustrates full automotive diagnostic with low quiescent current during fault mode.

User guide: PDF
Supported products & hardware
In stock
Limit:
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Simulation model

TPS92638-Q1 Unencrypted PSpice Transient Model Package (Rev. C)

SLVMAQ1C.ZIP (111 KB) - PSpice model
Supported products & hardware
Reference design

TIDA-00356 — Automotive Door Control Switch Reference Design

This automotive door control switch reference design showcases a proof-of-concept solution for an automotive door control switch panel that communicates wirelessly to the door side mirror, window lift and door lock mechanisms. Using TI's automotive qualified Bluetooth® low energy + MCU CC2541-Q1 (...)

Supported products & hardware
Reference design

TIDA-00846 — Automotive high-side dimming rear light reference design

This reference design is for automotive high-side dimming rear light, which uses BCM to supply the rear light. In the design, the high-side driver TPS1H100-Q1 is used to output PWM supply with different duty cycle. Linear LED drivers TPS92630-Q1 and TPS92638-Q1 are used to drive LEDs in constant (...)

Supported products & hardware
Reference design

TIDA-01007 — EMC Compatible Automotive LED Rear Lamp With Sequential Turn Animation Reference Design

This design is an analog solution for automotive rear lamps with sequential turn animations. This design is compatible with the TL81000 RI and the BCI test in a third-party EMC lab. This design also illustrates full automotive diagnostic with low quiescent current during fault mode.
Supported products & hardware
Reference design

TIDA-01348 — CISPR 25 Class 5 Rated 7.5W Tail-Light Reference Design for Automotive LED Lighting System

This reference design is for automotive tail-light applications. The design features TPS92638-Q1 linear LED driver powered by a synchronous buck converter (LM53601-Q1) that is directly supplied from the automotive-battery voltage. This design helps pass CISPR 25 Class 5 conduct emission (...)
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
HTSSOP (PWP) 20 Ultra Librarian
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