Datasheet > FAN501A

FAN501A

更新时间： 2022-02-26 13:35:55

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		/
页数	文件大小	规格书
16页	1348K
描述
Offline DCM / CCM Flyback PWM Controller for Charger Applications

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FAN501A 数据手册

April 2014

FAN501A

Offline DCM / CCM Flyback PWM Controller for

Charger Applications

Description

Features

The advanced PWM controller, FAN501A, 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.

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

Compared with

a conventional approach using

external control circuit in the secondary side for CC

regulation, the FAN501A can reduce total cost,

component count, size, and weight; while increasing

efficiency, productivity, and system reliability.

High Power Density and High Conversion

Efficiency in CCM Compact Charger Applications

Frequency Hopping to Reduce EMI Noise

High-Voltage Startup

V_o

Precise Maximum Output Power Limit by CC

Regulation through External Resistor Adjustment

Peak-Current-Mode Control with Slope

Compensation to Avoid Sub-Harmonic Oscillation

Maximum

Typical

Minimum

Programmable Over-Temperature Protection with

Latch Mode through External NTC Resistor

Two-Level UVLO Reduces Input Power in Output

Short Situation

I_o

Figure 1.

Typical Output V-I Characteristic

V_SOver-Voltage Protection with Latch Mode

V_DDOver-Voltage Protection with Auto Restart

Available in MLP 4 X 3 Package

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

Operating

Temperature Range

Packing

Method

Part Number

Package

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

0.8 mm Pitch, Single DAP

FAN501AMPX

Tape & Reel

-40C to +125C

www.fairchildsemi.com

FAN501A • Rev. 1.0.0

12 3 4 5 6 7...16

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