FAN5616

更新时间： 2024-09-27 04:18:11

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		驱动器泵
页数	文件大小	规格书
14页	914K
描述
High-Efficiency, Constant-Current LED Driver with Adaptive Charge Pump

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FAN5616 数据手册

November 2005

FAN5616

High-Efﬁciency, Constant-Current LED Driver with

Adaptive Charge Pump

Features

Description

■ 3-Channel Parallel LED Driver for a Large Range of

The FAN5616 generates a regulated output current from

a battery with an input voltage between 2.7V to 5.5V.

Switch reconﬁguration and fractional switching tech-

niques are utilized to achieve high efﬁciency over the

entire input voltage range. The adaptive nature of the

built-in charge pump eliminates the need for LED pre-

selection (matching) and ensures operation with high

efﬁciency. The driver's built-in, proprietary, auto-sense

circuitry ensures the same high efﬁciency regardless of

the number of LEDs. When the input voltage is sufﬁ-

ciently high to sustain the LED’s programmed current

level, the FAN5616 reconﬁgures itself to operate as a lin-

ear regulator, and the charge pump is turned off.

Forward Voltages

■ Adaptive V

Adjustment to the Highest Diode

OUT

Forward Voltage

■ Internally Matched LED Current Sources

■ Matched LED Currents with Matched or Unmatched

LEDs

■ Built-in Charge Pump with Three Modes of Operation:

1x, 1.5x, and 2x

■ Up to 90% Efﬁciency

■ Up to 50kHz PWM Dimming Frequency

■ Low EMI, Low Ripple

■ Up to 120mA Output Current

■ Drives up to 3 LEDs at 40mA each

The FAN5616 supports both digital and PWM LED

brightness control methods. The built-in 2-bit DAC offers

a selection of four LED current levels, each level is a per-

centage of the maximum LED current set by the external

■ External Resistor to Set Maximum (100%) LED

Current

resistor.

SET

■ Built-in 2-bit DAC to Control LED Current in Digital

The FAN5616 includes built-in shutdown, short circuit

and thermal protection circuitry. A built-in smart soft-start

circuitry prevents excessive current draw during power

on while allowing for an increased PWM frequency for

dimming.

Mode

■ 2.5V to 5.5V Input Voltage Range

■ I < 1µA in Shutdown Mode

■ 1MHz Operating Frequency

■ Shutdown Isolates Output from Input

■ Smart Soft-Start Limits In-Rush Current

■ Short Circuit Protection

Minimal external components are required. Only two

0.1µF to 1µF bucket capacitors, a 4.7µF input capacitor

and a 1µF output capacitor are needed for proper opera-

tion.

■ Minimal External Components Needed

■ Available in a 3x3mm 16-lead MLP Package

The FAN5616 is available in a 3x3mm 16-lead MLP

package.

Applications

■ Cell Phones

■ PDAs, DSCs, and MP3 Players

Ordering Information

Product Number

Package Type

Order Code

FAN5616

3x3mm 16-Lead MLP

FAN5616MPX

www.fairchildsemi.com

FAN5616 Rev. 1.0.0

12 3 4 5 6 7...14

中文翻译

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与FAN5616相关器件

型号	品牌	获取价格	描述	数据表
FAN5616MPX	FAIRCHILD	获取价格	LED Driver, 3-Segment, 3 X 3 MM, MO-220, MLP-16
FAN5617	FAIRCHILD	获取价格	High-Efficiency, Constant-Current LED Driver with TinyWire Brightness Control
FAN5617MPX	FAIRCHILD	获取价格	High-Efficiency, Constant-Current LED Driver with TinyWire Brightness Control
FAN5622	FAIRCHILD	获取价格	Linear LED Drivers with Single-Wire Digital Interface
FAN5622SX	FAIRCHILD	获取价格	Linear LED Drivers with Single-Wire Digital Interface
FAN5622SX	ONSEMI	获取价格	线性 LED 驱动器，2 沟道，带单线数字接口
FAN5624UMPX	FAIRCHILD	获取价格	Linear LED Drivers with Single-Wire Digital Interface
FAN5624UMPX	ONSEMI	获取价格	带单线式数字接口的 4 通道线性 LED 驱动器
FAN5626LX	FAIRCHILD	获取价格	Linear LED Drivers with Single-Wire Digital Interface
FAN5626LX	ONSEMI	获取价格	线性 LED 驱动器，6 沟道，带单线数字接口

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