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參數(shù)資料
| 型號： | AIC1628 |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | 3-Cell, High-Efficiency, Step-Up DC/DC Converter |
| 中文描述： | 3節(jié)電池，高效率，升壓型DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 1/7頁 |
| 文件大?。?/td> | 259K |
| 代理商： | AIC1628 |
AIC1628
3-Cell, High-Efficiency, Step-Up DC/DC Converter
Analog Integrations Corporation
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
www.analog.com.tw
DS-1628-00
TEL: 886-3-5772500
FAX: 886-3-5772510
1
FEATURES
4V to 24V Input Voltage Operation.
Adjustable Output Voltage.
Low Quiescent Current at 100
μ
A.
Pulse-Skipping and Pulse-Frequency Modulation
Maintain High Efficiency (max. 95%).
90KHz to 250KHz Oscillator Frequency.
Power-Saving Shutdown Mode (8
μ
A Typical).
Push-Pull Driver Output.
APPLICATIONS
Flash Memory Programming Power Supply.
Positive LCD Contrast Bias for Notebook &
Palmtop Computers.
Step-Up DC/DC Converter Module.
Telecom Power Supply.
DESCRIPTION
The AIC1628 is a high performance step-up
DC/DC converter, designed to drive an external
power switch to generate programmable posi-
tive voltages. In the particularly suitable LCD
contrast bias and flash memory programming
power supply applications, typical full-load effi-
ciencies are 85% to 95%. 4V to 24V input op-
eration range allows the AIC1628 to be powered
directly by the battery pack in the most battery-
operated applications for greater efficiency.
Output voltage can be scaled to 40V or greater
by two external resistors. A Pulse-Frequency
Modulation scheme is employed to maintain
high efficiency conversion under wide input
voltage range. Quiescent current is about
100
μ
A and can be reduced to 8
μ
A in shutdown
mode. Switching frequency being around 90KHz
to 250KHz range, small size switching compo-
nents are ideal for battery powered portable
equipments, like notebook and palmtop com-
puters.
TYPICAL APPLICATION CIRCUIT
AIC1628
CL
DHI
DLOW
FB
GND
SHDN
VIN
VREF
+36V
V
OUT
>50mA
1N5819
D1
C5
+
C6
V
IN
+5V ~ 24V
C1
120
μ
F
+
5V
*Buss Fuse MCR-2A
**Sumida CDR105
*Fuse
60m
68
μ
H
0
μ
F
C2
R1
470K
R2
16.5K 0.033
μ
F
C3
220
μ
F
0.1
μ
F
2SK940
0.01
μ
F
C4
**L1
Q1
Load Current (mA)
E
V
IN
=13V
0
50
100
150
200
80
85
90
95
V
IN
=18V
V
IN
=9V
V
IN
=5V
V
OUT
=36V
Color LCD Contrast Bias Supply
Efficiency vs. Output Current
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