The DRV870xD-Q1 devices are half bridge gate drivers that use two
external N-channel MOSFETs targeted to drive unidirectional brushed-DC motors or solenoid
A PWM interface allows simple interfacing to controller circuits. An
internal sense amplifier provides adjustable current control. Integrated Charge-Pump allows for
100% duty cycle support and can be used to drive external reverse battery switch. Independent Half
Bridge mode allows sharing of half bridges to control multiple DC motors sequentially in a
cost-efficient way. The gate driver includes circuitry to regulate the winding current using fixed
off-time PWM current chopping.
devices include Smart Gate Drive technology to remove the need for any external gate components
(resistors and Zener diodes) while fully protecting the external FETs. The Smart Gate Drive
architecture optimizes dead time to avoid any shoot-through conditions, provides flexibility in
reducing electromagnetic interference (EMI) with programmable slew-rate control and protects
against any gate-short conditions. Additionally, active and passive pulldowns are included to
prevent any dv/dt gate turnon.
A low-power sleep mode is provided which shuts down internal circuitry to achieve a
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quiescent-current draw. The device can be used in a very compact design because of its small
5 mm × 5 mm package with few external components.