FAN501MPX View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

FAN501MPX

Offline DCM / CCM Flyback PWM Controller for Charger Applications

Fairchild Semiconductor 

April 2014

FAN501

Offline DCM / CCM Flyback PWM Controller for

Charger Applications

Features

 WSaver® Technology Provides Ultra-Low

Standby Power Consumption for Energy Star’s

5-Star Level (<30 mW)

 Constant-Current (CC) Control without

Secondary-Side Feedback Circuitry for

Discontinuous Conduction Mode (DCM) and

Continuous Conduction Mode (CCM)

 Dual-Frequency Function Changes Switching

Frequency (140 kHz / 85 kHz) According to Input

Voltage to Maximize Transformer Utilization and

Improve Efficiency

 High Power Density and High Conversion

Efficiency with CCM Operation in Typical 10 W

to15 W Compact Charger Applications

 Frequency Hopping to Reduce EMI Noise

 High-Voltage Startup

 Precise Maximum Output Power Limit by CC

Regulation through External Resistor Adjustment

 Peak-Current-Mode Control with Slope

Compensation to Avoid Sub-Harmonic Oscillation

 Programmable Over-Temperature Protection with

Latch Mode through External NTC Resistor

 VS Over-Voltage Protection with Latch Mode

 VS Under-Voltage Protection with Auto-Restart

 VDD Over-Voltage-Protection with Auto-Restart

 Available in MLP 4 X 3 Package

Description

The advanced PWM controller, FAN501, simplifies

isolated power supply design that requires CC

regulation of the output. The output current is

precisely estimated with only the information in the

primary side of the transformer and controlled with an

internal compensation circuit, removing the output

current-sensing loss and eliminating external CC

control circuitry. With an extremely low operating

current (250 µA), Burst Mode maximizes light-load

efficiency, allowing conformance to worldwide

Standby Mode efficiency guidelines.

Compared with a conventional approach using

external control circuit in the secondary side for CC

regulation, the FAN501 can reduce total cost,

component count, size, and weight; while increasing

efficiency, productivity, and system reliability.

Vo

Maximum

Typical

Minimum

Figure 1.

Io

Typical Output V-I Characteristic

Applications

 Battery Chargers for Smart Phones, Feature

Phones, and Tablet PCs

 AC-DC Adapters for Portable Devices or Battery

Chargers that Require CV / CC Control

Ordering Information

Part Number

FAN501MPX

Operating

Temperature Range

Package

-40C to +125C

10-Lead, MLP, QUAD, JEDEC MO-220 4 mm x 3 mm,

0.8 mm Pitch, Single DAP

Packing

Method

Tape & Reel

© 2014 Fairchild Semiconductor Corporation

FAN501 • Rev. 1.0.0

www.fairchildsemi.com

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