MAX1621

更新时间： 2024-11-25 22:57:59

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
20页	254K
描述
Digitally Adjustable LCD Bias Supplies

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数据手册

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MAX1621 数据手册

19-1214; Rev 1; 1/98

Dig it a lly Ad ju s t a b le LCD Bia s S u p p lie s

0/MAX621

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

Fe a t u re s

The MAX1620/MAX1621 convert a 1.8V to 20V battery

voltage to a positive or negative LCD backplane bias

voltage. Backplane bias voltage can be automatically

disabled when the display logic voltage is removed,

protecting the display. These devices use very little PC

board area, come in ultra-small QSOP packages, and

require only small, low-profile external components.

♦ 1.8V to 20V Battery Input Voltage

♦ Automatic Disable when Display Logic

is Shut Down

♦ Extremely Small QSOP Package

♦ 32-Level Internal DAC

Output voltage can be set to a desired positive or nega-

tive voltage range with external resistors, and adjusted

over that range with the on-board digital-to-analog con-

verter (DAC) or with a potentiometer. The MAX1620/

MAX1621 include a 5-bit DAC, allowing digital software

control of the bias voltage. The MAX1620 uses up/down

digital signaling to adjust the DAC, and the MAX1621

uses the System Management Bus (SMBus™) 2-wire

serial interface.

♦ SMBus Serial Interface (MAX1621)

♦ Positive or Negative Output Voltage

Ord e rin g In fo rm a t io n

PART

TEMP. RANGE

-40°C to +85°C

PIN-PACKAGE

16 QSOP

These devices use a low-cost, external, N-channel MOSFET

power switch or NPN transistor, and can be configured

for positive or negative output voltages. Operating cur-

rent is a low 150µA, typically provided from a display’s

logic supply of 3.0V to 5.5V. The MAX1620/MAX1621 are

available in a 16-pin QSOP package.

MAX1620EEE

MAX1621EEE

16 QSOP

Ap p lic a t io n s

Notebook Computers

Palmtop Computers

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

Personal Digital Assistants

Portable Data-Collection Terminals

2V TO

12V

P in Co n fig u ra t io n

BATT

12.5V

23.5V OUT

3V TO

5.5V

DHI

TOP VIEW

POL

DN (SDA)

UP (SCL)

BATT

16 DHI

DLO

ON OFF

SHDN

DLO

DOWN

14 LX

PGND

SHDN (SUS)

POK

13 PGND

MAX1620

MAX1621

MAX1620

REF

AGND

DOUT

REF

POL

DOUT

AGND

LCDON

POK LCDON

QSOP

( ) ARE FOR MAX1621 ONLY.

SMBus is a trademark of Intel Corp.

________________________________________________________________ Maxim Integrated Products

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

For small orders, phone 1-800-835-8769.

12 3 4 5 6 7...20

中文翻译

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与MAX1621相关器件

型号	品牌	获取价格	描述	数据表
MAX1621CEE	MAXIM	获取价格	Analog IC
MAX1621EEE	MAXIM	获取价格	Digitally Adjustable LCD Bias Supplies
MAX1621EEE+	MAXIM	获取价格	Switching Controller, Voltage-mode, 0.00004A, CMOS, PDSO16, 0.150 INCH, 0.025 INCH PITCH,
MAX1621EEE-T	MAXIM	获取价格	暂无描述
MAX1622CUA	MAXIM	获取价格	Analog IC
MAX1622EUA	MAXIM	获取价格	Analog IC
MAX1623	MAXIM	获取价格	3A, Low-Voltage, Step-Down Regulator with Synchronous Rectification and Internal Switches
MAX1623	ADI	获取价格	3A、低电压、降压型稳压器，内置同步整流与开关
MAX1623EAP	MAXIM	获取价格	3A, Low-Voltage, Step-Down Regulator with Synchronous Rectification and Internal Switches
MAX1623EAP+	MAXIM	获取价格	Switching Regulator, Current-mode, 5.5A, 350kHz Switching Freq-Max, CMOS, PDSO20, SSOP-20

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