DRV8317 datasheet(15/69 Pages) TI

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8 Detailed Description

8.1 Overview

The DRV8317 is an integrated MOSFET driver for 3-phase motor-drive applications. The combined high-side

and low-side FETs' on-state resistance is 130-mΩ (typical). The device reduces system component count, cost,

and complexity by integrating three MOSFET half-bridges, gate drivers, charge pump, current sense amplifiers

and linear regulator for external loads. In DRV8317S, a standard serial peripheral interface (SPI) provides

a simple method for configuring the various device settings and reading fault status information through an

external controller. In DRV8317H, a hardware (pin-based) interface allows configuring the PWM mode (6x or 3x),

current sense amplifier gain and output slew rate through pin voltage levels.

The gate driver architecture is designed to protect against short-circuit events and dV/dt parasitic turn-on of the

internal power MOSFETs.

The DRV8317 integrates three bi-directional low-side current sense amplifiers for monitoring the current through

each of the half-bridges using a built-in current sense circuit; no external current sense resistors are needed.

The gain of the current sense amplifiers can be adjusted through the SPI or hardware interface.

In addition to the high level of device integration, the DRV8317 provides a wide range of integrated protection

features. These features include power supply undervoltage lockout (UVLO), over voltage protection (OVP),

charge pump undervoltage lockout (CPUV), over current protection (OCP), AVDD under voltage lockout

(AVDD_UV) and over temperature warning and shutdown (OTW and OTS). Fault events are indicated by the

nFAULT pin with detailed information available in the status registers in the SPI variant.

The DRV8317S, DRV8317H devices are available in 0.4-mm pin pitch, WQFN surface-mount packages. The

WQFN package size is 5.00-mm × 4.00-mm with a height of 0.8-mm.

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DRV8317

SLVSGT3 – DECEMBER 2022

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