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9

IRS2509SPbF

High

Low

Low

Figure 8: HIN & LIN input thresholds

Undervoltage Lockout Protection

shutdown the high- and low-side gate drive outputs, and the FAULT pin will transition to the low state to inform the controller of the

fault condition.

shutdown the high-side gate drive outputs of the IC.

The UVLO protection ensures that the IC drives the external power devices only when the gate supply voltage is sufficient to fully

enhance the power devices. Without this feature, the gates of the external power switch could be driven with a low voltage, resulting

in the power switch conducting current while the channel impedance is high; this could result in very high conduction losses within the

power device and could lead to power device failure.

Figure 9: UVLO protection

Shoot-Through Protection

The IRS2509 high-voltage IC is equipped with shoot-through protection circuitry (also known as cross-conduction prevention

circuitry).