DRV8262: Differences between DRV8262 and DRV8962 as alternatives to DRV8432

Hi Okutsu-san,

Thanks for contacting us via this forum.

Okutsu said:

Our customer is considering DRV8262 or DRV8962 as alternatives to the DRV8432.

Could you provide the load information and VM operating voltages and its current requirements?

Okutsu said:

DRV8262: PH/EN
This is one of the H-bridge control methods used in the DRV8262. It is a simple interface that uses two signal lines (PH and EN) to control the motor’s rotation direction and speed.

This the preferred and commonly used control mode for driving a BDC motor. The EN input is driven by a PWM 0 to 100 % for speed control and PH input is high or low for direction control of the motor. When the EN = 0 the output will be in recirculation mode or brake / slow decay.

Okutsu said:

DRV8962: Independent 1/2 Bridge
The DRV8962 includes four half-bridge drivers, each of which can be controlled independently. For example, is it possible to configure the device in the following ways?

• Drive four solenoids or valves individually
• Drive two brushed DC motors
• Drive one stepper motor
• Drive one BLDC motor (3-phase)
• Drive one or two Peltier elements (TECs)

All of those applications are possible with the DRV8962. See datasheet section Application and Implementation. While driving DC motors the DRV8962 behavior will be different compared to the DRV8262 because the current chopping is done differently - see datasheet section Current Sensing and Regulation. Current recirculation during tOFF is different for these two devices. For BDC motor and Stepper motor the DRV8262 will be better suited vs. the DRV8962 may not be able to have proper current regulation with low inductance and low DCR BDC or Stepper motors because of the tOFF architecture differences. It is mentioned in the DRV8962 datasheet - see below. This limitation is not there for the DRV8262 because of the difference in tOFF architecture. 

Okutsu said:

Regarding the peak current described on page 1 of the DRV8262 datasheet, what does it mean?

This is the short duration peak current that can be supported without triggering an OCP, for example startup inrush current of a BDC motor. Those values of the current are the IOCP MIN specification in their respective datasheets. The continuous maximum current that can be supported without a TSD thermal shutdown depends on thermal design, PWM switching frequency and ambient temperature TA of the application. This current would be ≤ 5 A per bridge in the DDW package and ≤ 10 A per bridge in the DDV package. Thank you.

Regards, Murugavel