HFC0310

Fixed-Frequency

Flyback Controller

HFC0310 Rev. 1.01

www.MonolithicPower.com

1

6/19/2012

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© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The HFC0310 is a flyback controller with fixed-

frequency operation.

The controller uses peak current mode to

provide excellent transient response and ease

loop compensation. When the output power

falls below a given level, the controller enters

burst mode to lower the stand-by power

consumption.

An external capacitor connected between the

FSET pin and GND programs the HFC0310

switching frequency. Otherwise, the HFC0310

uses a frequency shaping function that greatly

reduces the noise level, and reduces the cost of

the EMI filter.

The HFC0310 provides various protections,

lockout,

over-load

protection,

over-voltage

protection, and short-circuit protection.

The HFC0310 is available in a SOIC8 package.

FEATURES

• Programmable switching frequency up to

600kHz

• Frequency shaping (±3.5%)

• Current-mode operation

• Very low start-up current (12μA)

• Very low standby power consumption via

active-burst mode

• Internal 350ns leading-edge blanking

• Built-in 3ms soft-start function

• Internal slope compensation

• Built-in PRO pin pull-up (>3.25V) auto-

restart function

• Over-temperature protection

• Over-voltage protection on VCC

• Time-based over-load protection

• Short-circuit protection

APPLICATIONS

• Power Meters

• Switching Mode Power Supplies

• AC/DC Adapters, Switching Chargers

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.