MP1924A―100V, 4A HIGH FREQUENCY HALF-BRIDGE GATE DRIVER
REFERENCE DESIGN CIRCUITS
Half-Bridge Converter
The MP1924A drives the MOSFETS with
alternating signals with dead time in half-bridge
converter topology. The input voltage can rise up
to 100V with the alternating signals INT and INL
coming from the PWM controller (see Figure 4).
Input Voltage
up to 100V
INH
INL
SW
DRVH
BST
INH
INL
Secondary
Circuit
VSS
DRVL
VDD
DRVL
DRVL
VDD
8V - 15V
Figure 4: Half-Bridge Converter
Two-Switch Forward Converter
In two-switch forward converter topology, both
MOSFETs are turned on and off simultaneously.
The input signals INH and INL come from a PWM
controller that senses the output voltage and
output current during current-mode control.
The Schottky diodes clamp the reverse swing of
the power transformer and must be rated for the
input voltage. The input voltage can rise up to
100V (see Figure 5).
Input Voltage
up to 100V
INH
INL
INH
SW
DRVH
BST
INL
VSS
DRVL
Secondary
Circuit
VDD
VDD
8V - 15V
DRVL
DRVL
Figure 5: Two-Switch Forward Converter
MP1924A Rev. 1.1
2/8/2018
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