Product details


Number of channels (#) 2 Topology Buck Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125 Vin (Min) (V) 4.5 Vin (Max) (V) 65 Vout (Min) (V) 0 Vout (Max) (V) 61 Iout (Max) (A) 1.6 Iq (Typ) (mA) 5 Switching frequency (Max) (kHz) 2200 Features Fault Detection, LED Open Detection, Precision Dimming Control, Thermal Error Flag, Thermal Shutdown open-in-new Find other Automotive LED drivers

Package | Pins | Size

HTSSOP (DAD) 32 89 mm² 11 x 8.1 HTSSOP (DAP) 32 68 mm² 11 x 6.1 open-in-new Find other Automotive LED drivers


  • AEC-Q100 qualified for automotive applications
    • Grade 1: –40°C to 125°C ambient operating temperature
    • Device HBM classification level H1C
    • Device CDM classification level C5
  • Functional Safety-Capable
  • 4.5-V to 65-V wide input voltage range
  • Up to 1.6-A continuous output current with 4% accuracy
  • Adaptive on-time average current control
  • Programmable switching frequency from 100-kHz to 2.2-MHz
  • Advanced dimming operation
    • 10-bit precision analog dimming
    • 10-bit precision internal PWM dimming
    • Supports external PWM dimming input
    • Optimized for external shunt dimming including LED Matrix Manager
  • Cycle-by-cycle switch overcurrent protection
  • Switch thermal protection
  • Serial peripheral interface (SPI)
    • Configurable analog reference, switching frequency, and PWM dimming duty cycle
    • Fault monitoring and reporting
  • Limp-home (LH) and stand-alone mode operation
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The TPS92520-Q1 is a monolithic dual synchronous buck LED driver with a wide 4.5-V to 65-V operating input voltage range that can independently power two strings of series connected LEDs. The TPS92520-Q1 implements an adaptive on-time average current mode control and is designed to be compatible with shunt FET dimming techniques and LED matrix manager-based dynamic beam headlamps. The adaptive on-time control provides near constant switching frequency that can be set between 100-kHz and 2.2-MHz. Inductor current sensing and closed-loop feedback enables better than ±4% accuracy over wide input voltage, output voltage and ambient temperature range.

The high performance LED driver can independently modulate LED current using both analog or PWM dimming techniques. Linear analog dimming response with over 16:1 range is obtained by programming the 10-bit IADJ value via SPI. PWM dimming of LED current is achieved by directly modulating the corresponding UDIM input pin with the desired duty cycle or by enabling the internal PWM generator circuit. The PWM generator translates the 10-bit PWM register value to a corresponding duty cycle by comparing it to a programmable digital counter.

The TPS92520-Q1 incorporates advanced SPI programmable diagnostic and fault protection featuring: cycle-by-cycle switch current limit, bootstrap undervoltage, LED open, LED short, thermal warning and thermal shutdown. An on-board 10-bit ADC samples critical input parameters required for system health monitoring and diagnostics.

The TPS92520-Q1 is available in a 8.1-mm x 11-mm thermally-enhanced 32-pin HTSSOP package with a 2.75-mm x 3.45-mm top-exposed and bottom-exposed pad.

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Technical documentation

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Type Title Date
* Data sheet TPS92520-Q1 4.5-V to 65-V Dual 1.6-A Synchronous Buck LED Driver with SPI Control datasheet (Rev. D) Feb. 15, 2020
User guide TPS92520EVM-133 Dual 1.6-A Synchronous Buck LED Driver Evaluation Module (Rev. A) Sep. 23, 2021
Application note Paralleling LED Driver Channels to Support Higher Currents Using TPS92520-Q1 or Sep. 10, 2021
Application note Automotive Front Headlight Selection Guide Apr. 16, 2021
User guide LEDMCUEVM-132 MSP432™ LED Controller Evaluation Module Oct. 06, 2020
Application note TPS92520-Q1 Frame Definitions and Examples Oct. 05, 2020
White paper Streamlining Functional Safety Certification in Automotive and Industrial Jun. 09, 2020
White paper 簡化汽車及工業領域的功 能安全認證 Jun. 09, 2020
White paper 자동차 및 산업 분야의 기능적 안전성 인증 간소화 Jun. 09, 2020
Technical article Designing a headlight ECU with a high-power-density constant-on-time DC/DC buck LED driver Oct. 24, 2019
Technical article How semiconductor technologies are changing automotive lighting roadmaps Oct. 24, 2019
User guide TPS92520-Q1 Launchpad Evaluation Module User's Guide (Rev. B) Oct. 22, 2019
White paper An ECU Architecture for Adaptive Headlights Aug. 06, 2019
Technical article Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical article LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016

Design & development

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

Hardware development

document-generic User guide

The LEDMCUEVM-132 implements SPI communications that support multiple devices on the bus, UART communications for the LMMs family of devices, CAN transceiver for UART to control LMM family of devices, 4 PWM signals for dimming, multiple IOs, isolated 5-V supply, digital isolators, and a standard CAN (...)

  • SPI communications that supports up to 6 devices on the bus
  • UART communications to work with LMM products
  • CAN transceivers for both UART communications and CAN protocol communications
  • 4 dedicated PWM signals for PWM dimming
  • Multiple GPIOs to support specialized features
  • Digital Isolators for all MSP432 (...)
document-generic User guide
The TPS92520EVM-074 features a two phase, constant voltage ('CV') boost regulator based on the TPS92682-Q1 dual channel controller powering 2 x TPS92520-Q1 IC's provding 4 current regulated channels of up to 1.6 Amps and 50W per cahnnel (total output power limited to 100W). The TPS92682-Q1 and (...)
  • Supports 6V - 42V input. (12V nominal)
  • 1 x Programmable boost output voltage up to 60V
  • Reverse battery protection, CAN interface, 5V rail also included
  • 4 x Programmable buck output current channels
  • SPI inteface for fault monitoring, and fault handling
  • GUI provides computer interface and design tool
document-generic User guide

The TPS92520EVM-133 features the TPS92520-Q1 product providing 2 current regulated channels of up to 1.6 A and 30 W per channel. (Total output power limited to 60 W) TPS92520 are controlled via a SPI interface. The EVM is controlled and monitored via the serial interface bus by the required (...)

  • Supports 6-V to 65-V input (48-V nominal)
  • 2 x Programmable buck output current channels up to 1.6 A for each channel
  • GUI provides computer interface and design tool
  • SPI inteface for fault monitoring, and fault handling

Design tools & simulation

SLUM727.ZIP (170 KB) - SIMPLIS Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

Automotive LED headlight driver module for halogen replacement reference design
TIDA-050040 — This reference design showcases the TPS92682 and the TPS92520 as a fully self functional three-channel LED driver for headlight applications.  The design is intended to be a low-cost halogen headlight module replacement compatible with an automotive body control module.  The three LED (...)
document-generic Schematic
120W dual-stage matrix compatible automotive headlight ECU reference design
TIDA-050030 — This reference design details a headlight ECU using an interleaved boost in voltage regulation mode feeding four synchronous buck channels. This design is also capable of matrix headlight control and is mounted to a heatsink and enclosure to emulate an automotive headlight ECU. The TPS92682-Q1 is (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
HTSSOP (DAD) 32 View options
HTSSOP (DAP) 32 View options

Ordering & quality

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