Datasheet > ML4863

ML4863

更新时间： 2024-09-14 22:54:47

品牌	Logo	应用领域
MICRO-LINEAR		控制器
页数	文件大小	规格书
10页	217K
描述
High Efficiency Flyback Controller

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中文翻译

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ML4863 数据手册

July 2000

FEATURING

Extended Commercial Temperature Range

-20˚C to 70˚C

ML4863*

for Portable Handheld Equipment

High Efficiency Flyback Controller

GENERAL DESCRIPTION

FEATURES

The ML4863 is a flyback controller designed for use in

multi-cell battery powered systems such as PDAs and

notebook computers. The flyback topology is ideal for

systems where the battery voltage can be either above or

below the output voltage, and where multiple output

voltages are required.

■ Variable frequency current mode control and

synchronous rectification for high efficiency

■ Minimum external components

■ Guaranteed start-up and operation over a wide input

voltage range (3.15V to 15V)

The ML4863 uses the output voltage as the feedback

control signal to the current mode variable frequency

flyback controller. In addition, a synchronous rectifier

control output is supplied to provide the highest possible

conversion efficiency (greater than 85% efficiency over a

1mA to 1A load range).

■ High frequency operation (>200kHz) minimizes the

size of the magnetics

■ Flyback topology allows multiple outputs in addition to

the regulated 5V

The ML4863 has been designed to operate with a

minimum number of external components to optimize

space and cost.

■ Built-in overvoltage and current limit protection

*Some Packages Are Obsolete

BLOCK DIAGRAM

SHDN

BIAS & UVLO

4.5V

LDO

–

REF

GND

CURRENT

COMPARATOR

OUT 1

SWITCHING

CONTROL

COMP

–

18mV

CROSS-CONDUCTION

PROTECTION

RECTIFIER

COMPARATOR

OUT 2

–

COMP

BLANKING

SENSE

12 3 4 5 6 7...10

中文翻译

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与ML4863相关器件

型号	品牌	获取价格	描述	数据表
ML4863CS	MICRO-LINEAR	获取价格	High Efficiency Flyback Controller
ML4863ES	MICRO-LINEAR	获取价格	High Efficiency Flyback Controller
ML4863IS	MICRO-LINEAR	获取价格	High Efficiency Flyback Controller
ML4865	FAIRCHILD	获取价格	High Voltage High Current Boost Regulator
ML4865	MICRO-LINEAR	获取价格	High Voltage High Current Boost Regulator
ML4865CS2	ROCHESTER	获取价格	2 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PDSO8, SOIC-8
ML4865CS2	FAIRCHILD	获取价格	Switching Regulator, Current-mode, 2A, 200kHz Switching Freq-Max, CMOS, PDSO8, SOIC-8
ML4865CS-2	FAIRCHILD	获取价格	High Voltage High Current Boost Regulator
ML4865CS-2	MICRO-LINEAR	获取价格	High Voltage High Current Boost Regulator
ML4865CS-2	ROCHESTER	获取价格	Switching Regulator, Current-mode, 2A, 200kHz Switching Freq-Max, PDSO8, SOIC-8