JAJSPA5 July 2020 DRV8353M
PRODUCTION DATA
In this mode, the corresponding input pin independently controls each high-side and low-side gate driver. This control mode allows for the external controller to bypass the internal dead-time handshake of the DRV8353M or to utilize the high-side and low-side drivers to drive separate high-side and low-side loads with each half-bridge. These types of loads include unidirectional brushed DC motors, solenoids, and low-side and high-side switches. In this mode, If the system is configured in a half-bridge configuration, shoot-through occurs when the high-side and low-side MOSFETs are turned on at the same time.
INLx | INHx | GLx | GHx |
---|---|---|---|
0 | 0 | L | L |
0 | 1 | L | H |
1 | 0 | H | L |
1 | 1 | H | H |
Because the high-side and low-side VDS overcurrent monitors share the SHx sense line, using both of the monitors is not possible if both the high-side and low-side gate drivers are being operated independently.
In this case, connect the SHx pin to the high-side driver and disable the VDS overcurrent monitors as shown in Figure 13-5.
If the half-bridge is used to implement only a high-side or low-side driver, using the VDS overcurrent monitors is still possible. Connect the SHx pin as shown in Figure 13-6 or Figure 13-7. The unused gate driver and the corresponding input can be left disconnected.