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参数资料
| 型号： | MAX1621EEE |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | Digitally Adjustable LCD Bias Supplies |
| 中文描述： | SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | 0.150 INCH, 0.025 INCH PITCH, QSOP-16 |
| 文件页数： | 1/20页 |
| 文件大小： | 253K |
| 代理商： | MAX1621EEE |
General Desc ription
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.
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.
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.
Applic ations
Notebook Computers
Palmtop Computers
Personal Digital Assistants
Portable Data-Collection Terminals
Features
o
1.8V to 20V Battery Input Voltage
o
Automatic Disable when Display Logic
is Shut Down
o
Extremely Small QSOP Package
o
32-Level Internal DAC
o
SMBus Serial Interface (MAX1621)
o
Positive or Negative Output Voltage
M
Digitally Adjustable LCD Bias S upplies
________________________________________________________________ Maxim Integrated Products
1
PART
MAX1620
EEE
MAX1621
EEE
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
16 QSOP
16 QSOP
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
Ordering Information
19-1214; Rev 1; 1/98
LX
DHI
DLO
PGND
DOUT
FB
V
DD
POL
SHDN
DN
UP
REF
AGND
MAX1620
12.5V
TO
23.5V OUT
2V TO
12V
3V TO
5.5V
ON
/
OFF
DOWN
UP
LCDON
POK
BATT
Typic al Operating Circ uit
SMBus is a trademark of Intel Corp.
Pin Configuration
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
DHI
DLO
LX
PGND
AGND
V
DD
DOUT
FB
DN (SDA)
UP (SCL)
BATT
SHDN (SUS)
POK
REF
POL
LCDON
TOP VIEW
MAX1620
MAX1621
QSOP
( ) ARE FOR MAX1621 ONLY.
8
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.
相关PDF资料 |
PDF描述 |
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| MAX1623EAP | 3A, Low-Voltage, Step-Down Regulator with Synchronous Rectification and Internal Switches |
| MAX1624 | High-Speed Step-Down Controllers with Synchronous Rectification for CPU Power |
| MAX1625ESE | High-Speed Step-Down Controllers with Synchronous Rectification for CPU Power |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1621EEE+ | 功能描述:其他电源管理 Digitally Adjustable LCD Bias Supply RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| MAX1621EEE+T | 功能描述:LCD 驱动器 Digitally Adjustable LCD Bias Supply RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| MAX1621EEE-T | 功能描述:显示驱动器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX1621EPE+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX1621ESE+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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