MP1924―100V, 4A HIGH FREQUENCY HALF-BRIDGE GATE DRIVER

MP1924 Rev. 1.0

www.MonolithicPower.com

12

1/14/2015

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REFERENCE DESIGN CIRCUITS

Half Bridge Converter

The

MP1924

drives

the

MOSFETS

with

alternating signals (with dead time) in half-bridge

converter topology. Therefore, from the PWM

controller drives INH and INL with alternating

signals the input voltage can go up to 100V.

Input Voltage

Up to 100V

DRVL

DRVL

INL

INH

VDD

VDD

BST

DRVH

SW

INH

INL

VSS

DRVL

9V - 16V

Secondary

Circuit

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 signal (INH and INL) comes 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 go up to

100V.

INH

INL

DRVL

INH

INL

VSS

DRVL

VDD

BST

DRVH

SW

DRVL

Secondary

Circuit

VDD

Input Voltage

Up to 100V

9V - 16V

Figure 5: Two-Switch Forward Converter