SLVSGZ1A May 2024 – July 2024 DRV8161 , DRV8162
ADVANCE INFORMATION
DRV816x supports independent PWM mode, the INH and INL pins control the outputs, GH and GL, respectively. This control mode lets the device drive separate high-side and low-side load. The independent PWM drive mode can be used for various type of loads including solenoids, Switched Reluctance Motor (SRM), unidirectional brushed DC motors, and low-side and high-side switches. In this mode, turning on both the high-side and low-side MOSFETs at the same time in a given half bridge gate driver is possible to use the device as a high-side or low-side driver. The shoot-through protection and dead time are bypassed in the mode.
INL | INH | GL | GH |
---|---|---|---|
0 | 0 | L | L |
0 | 1 | L | H |
1 | 0 | H | L |
1 | 1 | H | H |
Figure 7-3 shows how the device can be used to connect an inductive load where both the high-side and low-side MOSFETs can be turned on at the same time to drive the load without causing shoot-through. The external diodes for current recirculation are recommended. This configuration helps the design of solenoids or applications. The trickle charge pump is enabled all the time regardless of low-side PWM activity.
Figure 7-4shows how the device can be used to connect a high-side load and a low-side load at the same time with one half-bridge and drive the loads independently.