MP6922

Dual Fast Turn-off Intelligent Controller

MP6922 Rev. 1.23

www.MonolithicPower.com

1

9/19/2012

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

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP6922 is a dual fast turn-off intelligent

controller to drive two N-CH power MOSFETs

in LLC resonant converters for synchronous

rectification.

The IC regulates the forward voltage drop of the

power switch to about 70mV and turns it off

before the voltage goes negative.

MP6922 has a light-load function to latch-off the

gate driver at light load condition, during which

only

about

600μA

quiescent

current

is

consumed.

The fast turn-off speed of MP6922 makes both

CCM and DCM driving available. An internal

Reverse Current Protection (RCP) function

ensures safe operation of the MOSFETs in high

frequency CCM condition.

MP6922 requires a minimum number of readily

available standard external components and is

available in SOIC8E, SOIC8 or SOIC14

package.

FEATURES

• Works with both Standard and Logic Level

FETs

• Compatible with Energy Star, 0.5W Standby

Requirements

• Fast Turn-off Total Delay of 20ns

• Reverse Current Protection Function

• Max 300kHz Switching Frequency

• <600uA Quiescent Current at Light Load

Mode

• Supports CCM, CrCM and DCM Operation

Mode

• Available in SOIC8E, SOIC8 or SOIC14

package

APPLICATIONS

• AC-DC Adapter

• LCD & PDP TV

• Telecom SMPS

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Quality Assurance.

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

Q1

Q2

S

2

S

1

T

VOUT

EN

PGND

C1

R1

MP 6922

1

2

3

45

6

7

8

EN Signal

GND

1

1

Q1

Q2

S

2

S

1

T

C

out

VOUT

C1

MP6922

EN Signal

NC

EN

1

2

3

4

5

69

10

11

12

13

14

RCP

7

8

NC

LL

GND

R1

R3

R

PGND PGND

R2

C2

4

SOIC8E

SOIC14