Figure 5-1. Primary Side of Full
Bridge Converter Using the MCP14LH2181
RRG1, RRG2,
RRG3, and RRG4 values are typically between 0Ω
and 10Ω. The exact value is decided based on the MOSFET junction
capacitance and the drive current of gate driver. A value of 10Ω is
used in this example.
It is recommended that the input pulse (to HIN
and LIN) should have an amplitude of 2.5V minimum (for VDD = 15V)
with a minimum pulse width of 360 ns.
RG1, RG2, RG3,
and RG4 values are typically between 20Ω and 100Ω. The
exact value is decide based on the MOSFET junction capacitance and
drive current of the gate driver. A value of 50Ω is used in this
example.
RB1 and RB2 value is
typically between 3Ω and 20Ω. The exact value is calculated based on
the bootstrap capacitor value and the amount of current limiting
required for bootstrap capacitor charging. A value of 10Ω is used in
this example. Also, DB1 and DB2 should be an
ultra fast diode with a minimum rating of 1A and a voltage rating
greater than the system operating voltage.
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