ncp4303a ON Semiconductor, ncp4303a Datasheet - Page 18

• Manufacturer Part Number: ncp4303a
• Description: Ncp4303a/b Secondary Side Synchronous Rectification Driver For High Efficiency Smps Topologies
• Manufacturer: ON Semiconductor

trigger/disable input. If the trigger/disable input is pulled up
(above 1.5 V) the driver is disabled immediately. In some
cases, the driver is activated one more time by the current
sense because the trigger signal is still blanked. This final
drive pulse lasts only for the minimum on time period. If the
trigger signal is high for more than 100 ms, the driver enters
The NCP4303 operation can be disabled using the
Figure 42. Operating Waveforms for the Trig/Disable Input – Device Sleep Mode Transition – Case 1
Figure 41. Trigger Input Functionality Waveforms
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standby mode. The IC consumption is reduced to 390 mA
during the standby mode. When trigger input voltage is
decreased again the device recovers operation in 500 ns. If
the IC is enabled in the time the current sense input voltage
is negative (secondary current flows through the Shottky or
body diode) the IC waits for another switching cycle to
turn−on the SR MOSFET – refer to Figures 42, 43 and 44.