MP3910

Peak Current Mode

Boost PWM Controller with Programmable Frequency,

External Soft Start, and Light Load Operation

MP3910 Rev. 1.11

www.MonolithicPower.com

1

11/6/2014

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© 2014 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3910 is a Peak Current Mode PWM

controller that can drive an external MOSFET

capable of handling more than 10A current. It

has a typical operational current of 288µA and

can accommodate flyback, boost for non-

isolated and isolated applications.

Current mode control provides inherently simple

loop compensation and cycle-by-cycle current

limit. Under-voltage lockout, soft-start, internal

regulated supply and slope compensation are

all provided to minimize the external component

count.

While designed for Flyback applications, the

MP3910 can also be used for other topologies

including Boost, Forward and Sepic. The 1A

gate driver minimizes the power loss of the

external MOSFET while allowing the use of a

wide variety of standard threshold devices.

Additionally, MP3910 has pulse skipping mode

function that improves the efficiency with light

load or no load. It also provides hiccup

protection for OLP, OVP and SCP condition.

The MP3910 is available in MSOP10 package.

FEATURES





1A 12V MOSFET Gate Driver



External Soft-Start



Pulse Skipping Operation with Light Load



Programmable

Switching

Frequency

(30kHz-to-400kHz)



Frequency Synchronizable from 80kHz-to-

400kHz



Cycle-by-Cycle Current Limit



Over Voltage Protection



Short Circuit Protection



Over Temperature Protection



Available in an MSOP10 Package

APPLICATIONS



Telecom Isolated Power Supplies



Brick Modules



Off-line Controller



General Step Up Applications

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

status, please visit MPS website under Products, Quality Assurance page.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc..

Notes:

1) Refer to “Operation/Internal VCC Regulation” section for <7V

input voltage application.

TYPICAL APPLICATION

VIN

VCC

RT

GATE

GND

SS

FB

MP3910

EN/SYNC

COMP

9

5

2

6

3

10

1

4

8

ISENSE

7

VIN

VOUT

EN

Q1