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3.5.4 External Clock Synchronization
A TP3 (SYNC) test point has been provided on the evaluation board in order to synchronize the internal
oscillator to the external clock. Figure 5 shows the synchronized switching operation.
Conditions:
Input Voltage = 48VDC
Load Current = 9A
Traces:
Top Trace: SYNC pulse, 20% duty cycle, Volt/div = 5V
Middle Trace: SW voltage, Volt/div = 50V
Bottom Trace: Inductor Current, Amp/div = 5A
Horizontal Resolution = 2µs/div
Figure 5. Clock Synchronization
6
AN-2103 LM25117 Evaluation Board SNVA466B–May 2011–Revised April 2013
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