If at any time during operation, there is a loss of synchronization, the device will default to the internal PWM oscillator frequency until the synchronization clock returns. Once the clock is no longer present, the device will switch at 70% of the internal clock frequency for four consecutive cycles. After four consecutive cycles without clock pulses, the device will operate at the normal internal PWM oscillator frequency. This is demonstrated in Figure 7-4.

Figure 7-4 Clock Synchronization Transitions