NCP4303B ON Semiconductor, NCP4303B Datasheet - Page 22

• Manufacturer Part Number: NCP4303B
• Description: Secondary Side Synchronous Rectification Driver
• Manufacturer: ON Semiconductor

derived based on the load current or feedback regulator
voltage.
range it is necessary to have very short minimum on time and
off time periods in order to reach the required maximum
operating frequency. However, when a LLC converter
operates under low frequency, the minimum off time period
a way that the maximum pulse current into the Min_Toff
In LLC applications with a very wide operating frequency
Note that R
Figure 51. Possible Connection for Min Toff Prolongation in LLC Applications with Wide Operating Frequency
drain1
and R
drain2
Figure 50. Possible Connection for Min T
should be designed in such
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NCP4303A/B
Range
22
may then be too short. To overcome possible issues with the
LLC operating under low line and light load conditions, one
can prolong the minimum off time blanking period by using
resistors R
MOSFET drain – refer to Figure 51.
adjust pin is below 10 mA. Voltage on the min T
pins is clamped by internal zener protection to 10 V.
on
and T
drain1
off
and R
Modulation
drain2
connected from the opposite SR
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off
and T
on