MP1907―100V, 2.5A, HIGH FREQUENCY HALF-BRIDGE GATE DRIVER

MP1907 Rev. 1.1

www.MonolithicPower.com

12

11/20/2013

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2013 MPS. All Rights Reserved.

OPERATION

Switch Shoot-through Protection

The input signals of INH and INL are controlled

independently. Input shoot-through protection

circuitry is implemented to prevent shoot-

through between the HSFET and LSFET

outputs. Only one of the FET drivers can be ON

at one time. If both INH and INL are high at the

same time, both HSFET and LSFET will be

OFF.

Under Voltage Lock Out

When VDD or BST goes below their respective

UVLO thresholds, both DRVH and DRVL

outputs will go low to turn off both FETs. Once

VDD rises above the UVLO threshold, both

DRVH and DRVL will stay low until a rising

edge is detected on either INH or INL.

The truth table in Table 1 details the operation

of the HSFET and LSFET under different INH,

INL and UVLO conditions

Table1 States of Driver Output under different conditions

EN

BST-SW

Voltage

INH

INL

DRVH

DRVL

UVLO Latch

status

Operating

Condition

0

X

X

X

X

Open

200kΩ

pull down

X

X

X

X

0

0

0

0

X

X

X

1

1

0

0

X

X

Above UVLO

0

1

0

1

Normal

Above

UVLO

Above UVLO

1

0

1

0

Normal

Normal Operation

Falls below

UVLO

Above UVLO

X

X

0

0

Normal to

Tripped

Above

UVLO

Falls below

UVLO

X

X

0

0

Normal to

Tripped

Normal-to-Tripped

Transition

X

Above UVLO

0 or 1 0 or 1

0

0

Tripped

X

Below UVLO

X

X

0

0

Tripped

When UVLO latch is

tripped.

X

Above UVLO

0 to 1 0 to 1

0

0

Tripped, Reset

by INL & INH

X

Above UVLO

1 to 0

1

0

0 to 1

Tripped, Reset

by INH Falling

Below

UVLO

Above UVLO

1

1 to 0

0

0

Tripped, Reset

by INL Falling

Above

UVLO

Above UVLO

1

1 to 0

0 to 1

0

Tripped, Reset

by INL Falling

Below

UVLO

Above UVLO

0

0 to 1

0

0 to 1

Tripped, Reset

by INL

Below

UVLO

Above UVLO

0 to 1

0

0

0

Tripped, Reset

by INH

1

Above

UVLO

Above UVLO

0 to 1

0

0 to 1

0

Tripped, Reset

by INH

Tripped to Normal

Transition

Note: x = Don’t Care.

.