DRV81646
4-kanaliger Low-Side-Treiber, 65 V, 4 A, mit H/W, SPI, konfigurierbare Anstiegsrate u. Abschaltdauer
DRV81646
- 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.
Technische Dokumentation
| Typ | Titel | Datum | ||
|---|---|---|---|---|
| * | Data sheet | DRV81646 : 65V Four-Channel Low-side Driver with Hardware, SPI, and Configurable Slew Rate and Cut-off Duration datasheet (Rev. A) | PDF | HTML | 10 Dez 2025 |
| Certificate | DRV81646EVM EU Declaration of Conformity (DoC) | 22 Okt 2025 | ||
| White paper | Software-Defined Vehicles Shift the Future of Automotive Electronics Into Gear (Rev. B) | PDF | HTML | 21 Jan 2025 |
Design und Entwicklung
Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.
DRV81646DGQEVM — DRV81646 Evaluierungsmodul (DGQ-Gehäuse)
DRV81646EVM — DRV81646 – Evaluierungsmodul
DRV81X4X-EVM-GUI — DRV81X4X-GUI
Unterstützte Produkte und Hardware
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| Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
|---|---|---|
| HTSSOP (PWP) | 20 | Ultra Librarian |
| HVSSOP (DGQ) | 24 | Ultra Librarian |
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