MAX1640C

更新时间： 2024-09-14 22:57:59

品牌	Logo	应用领域
美信 - MAXIM		开关
页数	文件大小	规格书
11页	119K
描述
Adjustable-Output, Switch-Mode Current Sources with Synchronous Rectifier

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数据手册

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MAX1640C 数据手册

19-1245; Rev 0; 7/97

Ad ju s t a b le -Ou t p u t , S w it c h -Mo d e

Cu rre n t S o u rc e s w it h S yn c h ro n o u s Re c t ifie r

0/MAX641

_______________Ge n e ra l De s c rip t io n

____________________________Fe a t u re s

♦ 95% Efficiency

The MAX1640/MAX1641 CMOS, a d jus ta b le -outp ut,

switch-mode current sources operate from a +5.5V to

+26V input, and are ideal for microprocessor-controlled

battery chargers. Charging current, maximum output

voltage, and pulse-trickle charge are programmed with

external resistors. Programming the off-time modifies

the switching frequency, suppressing undesirable har-

monics in noise-sensitive circuits. The MAX1640’s high-

side current sensing allows the load to connect directly

to g round , e limina ting g round -p ote ntia l e rrors . The

MAX1641 incorporates a low-side current sense.

♦ +5.5V to +26V Input Supply Range

♦ 2V to 24V Adjustable-Output Voltage Range

♦ 100% Maximum Duty Cycle (Low Dropout)

♦ Up to 500kHz PWM Operation

♦ Optional Synchronous Rectifier

♦ 16-Pin QSOP Package

♦ Current-Sense Accuracy: 2% (MAX1641)

The MAX1640/MAX1641 step-down pulse-width-modu-

la tion (PWM) c ontrolle rs use a n e xte rna l P-c ha nne l

MOSFET switch and an optional, external N-channel

MOSFET synchronous rectifier for increased efficiency.

An internal low-dropout linear regulator provides power

for the internal reference and circuitry as well as the

gate drive for the N-channel synchronous rectifier.

5.3% (MAX1640)

______________Ord e rin g In fo rm a t io n

PART

TEMP. RANGE

0°C to +70°C

PIN-PACKAGE

Dice*

The MAX1640/MAX1641 are available in space-saving,

16-pin narrow QSOP packages.

MAX1640C/D

MAX1640EEE

MAX1641C/D

MAX1641EEE

-40°C to +85°C

0°C to +70°C

16 QSOP

Dice*

________________________Ap p lic a t io n s

-40°C to +85°C

16 QSOP

Battery-Powered Equipment

Laptop, Notebook, and Palmtop Computers

Handy Terminals

*Dice are specified at T = +25°C, DC parameters only.

Portable Consumer Products

Cordless Phones

__________Typ ic a l Op e ra t in g Circ u it

Cellular Phones

= +5.5V TO +26V

PCS Phones

LDOH

PDRV

Backup Battery Charger

__________________P in Co n fig u ra t io n

TOFF

REF

NDRV

PGND

CS+

TOFF

TOP VIEW

LDOL

TOFF

16 IN

15 LDOH

14 PDRV

13 NDRV

12 PGND

11 CS+

10 CS-

SET

OUT

CS-

MAX1640

MAX1641

MAX1640

TERM

REF

SET

TERM

GND

LDOL

GND

QSOP

________________________________________________________________ Maxim Integrated Products

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.

12 3 4 5 6 7...11

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与MAX1640C相关器件

型号	品牌	获取价格	描述	数据表
MAX1640C/D	MAXIM	获取价格	Adjustable-Output, Switch-Mode Current Sources with Synchronous Rectifier
MAX1640D	MAXIM	获取价格	Adjustable-Output, Switch-Mode Current Sources with Synchronous Rectifier
MAX1640EEE	MAXIM	获取价格	Adjustable-Output, Switch-Mode Current Sources with Synchronous Rectifier
MAX1640EEE+	MAXIM	获取价格	Adjustable-Output, Switch-Mode Current Sources with Synchronous Rectifier
MAX1640EEE+T	MAXIM	获取价格	Switching Controller, Current-mode, 0.02A, 500kHz Switching Freq-Max, CMOS, PDSO16, 0.150
MAX1640EEE-T	MAXIM	获取价格	Switching Controller, Current-mode, 0.02A, 500kHz Switching Freq-Max, CMOS, PDSO16, 0.150
MAX1640ESE	MAXIM	获取价格	Battery Charge Controller, Current-mode, PDSO16, 0.150 INCH, MS-012C, SOIC-16
MAX1640EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX1640/MAX1641
MAX1641	MAXIM	获取价格	Adjustable-Output, Switch-Mode Current Sources with Synchronous Rectifier
MAX1641	ADI	获取价格	可调输出、开关模式电流源，内置同步整流

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