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DRV81545

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55V, 2A 4-channel low-side driver with independent overtemperature and overcurrent protection

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Data sheet

DRV81545

ACTIVE
Data sheet Order now

Product details

Control interface Hardware (GPIO) Control mode PWM Vs (max) (V) 55 Vs (min) (V) 4.5 Vs ABS (max) (V) 60 Peak output current (A) 2 Operating temperature range (°C) -40 to 125 Rating Catalog Topology LSS
Control interface Hardware (GPIO) Control mode PWM Vs (max) (V) 55 Vs (min) (V) 4.5 Vs ABS (max) (V) 60 Peak output current (A) 2 Operating temperature range (°C) -40 to 125 Rating Catalog Topology LSS
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4
  • Four-channel integrated low-side switches
    • 235mΩ RDS(ON) at 25°C
    • Output stage 55V operating maximum (60V absolute maximum)
    • Low minimum operating supply voltage range with stable RDS(ON) across voltage: 4.5V
    • Selectable current limit from 0.5A up to 3A per channel
    • Integrated catch diodes for flexible decay (external TVS/Zener) as an alternate current path on switch turn-off
  • Hardware INx interface for fast switching up to 250kHz
  • Diagnostic feedback
    • MCU fault interrupt signal (nFAULT)
  • Thermally enhanced surface mount package (PWP20)
  • Protection features
    • User settable current limit
    • Independent overtemperature, overcurrent protection for each switch
    • Configurable over-current cut-off delay (COD)
  • Four-channel integrated low-side switches
    • 235mΩ RDS(ON) at 25°C
    • Output stage 55V operating maximum (60V absolute maximum)
    • Low minimum operating supply voltage range with stable RDS(ON) across voltage: 4.5V
    • Selectable current limit from 0.5A up to 3A per channel
    • Integrated catch diodes for flexible decay (external TVS/Zener) as an alternate current path on switch turn-off
  • Hardware INx interface for fast switching up to 250kHz
  • Diagnostic feedback
    • MCU fault interrupt signal (nFAULT)
  • Thermally enhanced surface mount package (PWP20)
  • Protection features
    • User settable current limit
    • Independent overtemperature, overcurrent protection for each switch
    • Configurable over-current cut-off delay (COD)

The DRV81545 is a four-channel low-side switch driver that operates from 4.5V to 55V and supports a wide range of load currents. The device integrates four low-side switches with a RDS(ON) of 235mΩ, each with a freewheeling diode to the VCLAMP pin. This feature allows the user to either recirculate current or connect an external TVS for inductive load turn-off.

The device can be controlled through a hardware GPIO interface. Each channel features individual overtemperature protection, and an analog current limit adjustable with an external resistor on the ILIM pin. There is an optional cut-off delay (COD) configuration which limits the duration of a current-limiting condition on the respective channel, helping to prevent damage to the device or the load. Faults are indicated on a fault output pin (nFAULT).

The DRV81545 is a four-channel low-side switch driver that operates from 4.5V to 55V and supports a wide range of load currents. The device integrates four low-side switches with a RDS(ON) of 235mΩ, each with a freewheeling diode to the VCLAMP pin. This feature allows the user to either recirculate current or connect an external TVS for inductive load turn-off.

The device can be controlled through a hardware GPIO interface. Each channel features individual overtemperature protection, and an analog current limit adjustable with an external resistor on the ILIM pin. There is an optional cut-off delay (COD) configuration which limits the duration of a current-limiting condition on the respective channel, helping to prevent damage to the device or the load. Faults are indicated on a fault output pin (nFAULT).
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* Data sheet DRV81545 : 55V Four-Channel Low-side Driver With Integrated Protection Features datasheet (Rev. A) PDF | HTML 09 Dec 2025
Certificate DRV81545EVM EU Declaration of Conformity (DoC) 26 Sep 2025

Design & development

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

Evaluation board

DRV81545EVM — DRV81545 evaluation module

The DRV81x4x evaluation module (EVM) allows for evaluation of the DRV81545, DRV81646, and DRV81646DGQ devices. The EVM has been programmed to work out of the box and begin driving loads right away. To simplify control and configuration, the EVM is accompanied by a graphical user interface (GUI) (...)
User guide: PDF | HTML
Not available on TI.com
Firmware

DRV81X4X-EVM-FIRMWARE — DRV81x4x-EVM FIRMWARE

DRV81x4x-EVM FIRMWARE
Supported products & hardware

Supported products & hardware

Products
Solenoid drivers
  • DRV81545 — 55V, 2A 4-channel low-side driver with independent overtemperature and overcurrent protection
  • DRV81646 — 65V, 4A 4-channel low-side driver with H/W, SPI and configurable slew rate and cut-off duration
Hardware development
Evaluation board
Download options
GUI for evaluation module (EVM)

DRV81X4X-EVM-GUI — DRV81X4X-GUI

DRV81X4X-GUI
Supported products & hardware

Supported products & hardware

Products
Solenoid drivers
  • DRV81545 — 55V, 2A 4-channel low-side driver with independent overtemperature and overcurrent protection
  • DRV81646 — 65V, 4A 4-channel low-side driver with H/W, SPI and configurable slew rate and cut-off duration
Hardware development
Evaluation board
Launch Download
Package Pins CAD symbols, footprints & 3D models
HTSSOP (PWP) 20 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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