NEU

DRV81646

AKTIV

4-kanaliger Low-Side-Treiber, 65 V, 4 A, mit H/W, SPI, konfigurierbare Anstiegsrate u. Abschaltdauer

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Datenblatt

document-pdfAcrobat DRV81646 : 65V Four-Channel Low-side Driver with Hardware, SPI, and Configurable Slew Rate and Cut-off Duration datasheet (Rev. A) (Englisch) PDF | HTML

DRV81646

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Control interface

Hardware (GPIO), SPI

Control mode

PWM

Vs (max) (V)

65

Vs (min) (V)

4.5

Vs ABS (max) (V)

70

Peak output current (A)

1.6

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Topology

LSS

Control interface

Hardware (GPIO), SPI

Control mode

PWM

Vs (max) (V)

65

Vs (min) (V)

4.5

Vs ABS (max) (V)

70

Peak output current (A)

1.6

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Topology

LSS

HTSSOP (PWP)

20

41.6 mm² (6.5 mm × 6.4 mm)

HVSSOP (DGQ)

24

29.89 mm² (6.1 mm × 4.9 mm)

Four-channel integrated low-side switches
- 140mΩ RDS(ON) at 25°C
- Operating supply voltage range: 4.5V to 65V (70V absolute maximum)
- Selectable current limit from 0.5A up to 4A per channel
- Fast PWM switching up to 500kHz
Flexible interface options:
- Hardware interface with independent channel PWM input
- SPI enables reduction in GPIO and isolation overhead for high channel count designs
Integrated catch diodes for flexible decay modes with optional external TVS/Zener diode as alternate current path on switch turnoff
Slew rate configurable (100ns – 1500ns) enables both slow/fast switching applications
Diagnostic feedback
- MCU fault interrupt signal (nFAULT)
- Per channel fault report available through SPI
Protection Features
- User settable current limit
- Independent overtemperature and overcurrent protection for each channel
- Configurable overcurrent cut-off delay (COD) 0.5ms-2ms

Four-channel integrated low-side switches
- 140mΩ RDS(ON) at 25°C
- Operating supply voltage range: 4.5V to 65V (70V absolute maximum)
- Selectable current limit from 0.5A up to 4A per channel
- Fast PWM switching up to 500kHz
Flexible interface options:
- Hardware interface with independent channel PWM input
- SPI enables reduction in GPIO and isolation overhead for high channel count designs
Integrated catch diodes for flexible decay modes with optional external TVS/Zener diode as alternate current path on switch turnoff
Slew rate configurable (100ns – 1500ns) enables both slow/fast switching applications
Diagnostic feedback
- MCU fault interrupt signal (nFAULT)
- Per channel fault report available through SPI
Protection Features
- User settable current limit
- Independent overtemperature and overcurrent protection for each channel
- Configurable overcurrent cut-off delay (COD) 0.5ms-2ms

The DRV81646 is a four-channel low-side switch driver that operates from 4.5V to 65V and supports a wide range of load currents. The device integrates four low-side switches with a RDS(ON) of 140mΩ, 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 or standard 4-wire SPI. 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. The output slew rates are configurable by setting a resistor on the RSLEW/CNTL pin, providing further flexibility in the control of the output switches. The device has an INRUSH mode boosting the current limit threshold for capacitive loads.

The DRV81646 provides a fault output pin (nFAULT) to indicate fault conditions, and per-channel fault status can be monitored in SPI mode. This feature allows the user to quickly identify and respond to any faults that occur.

The DRV81646 is a four-channel low-side switch driver that operates from 4.5V to 65V and supports a wide range of load currents. The device integrates four low-side switches with a RDS(ON) of 140mΩ, 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 or standard 4-wire SPI. 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. The output slew rates are configurable by setting a resistor on the RSLEW/CNTL pin, providing further flexibility in the control of the output switches. The device has an INRUSH mode boosting the current limit threshold for capacitive loads.

The DRV81646 provides a fault output pin (nFAULT) to indicate fault conditions, and per-channel fault status can be monitored in SPI mode. This feature allows the user to quickly identify and respond to any faults that occur.

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Top-Dokumentation	Typ	Titel	Format-Optionen	Datum
*	Datenblatt	DRV81646 : 65V Four-Channel Low-side Driver with Hardware, SPI, and Configurable Slew Rate and Cut-off Duration datasheet (Rev. A)	PDF \| HTML	10.12.2025
	Zertifikat	DRV81646EVM EU Declaration of Conformity (DoC)		22.10.2025
	Whitepaper	Software-Defined Vehicles Shift the Future of Automotive Electronics Into Gear (Rev. B)	PDF \| HTML	21.01.2025

Design und Entwicklung

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Evaluierungsplatine

DRV81646DGQEVM — DRV81646 Evaluierungsmodul (DGQ-Gehäuse)

Das DRV81x4x-Evaluierungsmodul (EVM) ermöglicht die einfache Evaluierung der Bausteine DRV81545, DRV81646 und DRV81646DGQ. Das EVM wurde so programmiert, dass es sofort einsatzbereit ist und mit der Laststeuerung beginnen kann. Zur Vereinfachung von Steuerung und Konfiguration beinhaltet das EVM (...)

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