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PDF AIC1628CS Data sheet ( Hoja de datos )
| Número de pieza | AIC1628CS | |
| Descripción | 3-Cell/ High-Efficiency/ Step-Up DC/DC Converter | |
| Fabricantes | Analog Intergrations Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AIC1628CS (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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AIC1628
3-Cell, High-Efficiency, Step-Up DC/DC Converter
FEATURES
4V to 24V Input Voltage Operation.
Adjustable Output Voltage.
Low Quiescent Current at 100µA.
Pulse-Skipping and Pulse-Frequency Modulation
Maintain High Efficiency (max. 95%).
90KHz to 250KHz Oscillator Frequency.
Power-Saving Shutdown Mode (8µA 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
100µA and can be reduced to 8µA 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
VIN
C2 VREF
SHDN
CL
DHI
DLOW
5V FB GND
AIC1628
*Fuse
60mΩ
+5V ~ 24V
VIN
+ C1
120µF
**L1
68µH
1N5819
D1
Q1
2SK940
C5
220µF
+
C6
0.1µF
+36V
VOUT
>50mA
R2 R1
16.5K 0.033µF
470K 0.01µF
*Buss Fuse MCR-2A
C3 C4 **Sumida CDR105
Color LCD Contrast Bias Supply
95
90
85
80 0
VIN=13V
VIN=9V
VIN=18V
VIN=5V
VOUT=36V
50 100
Load Current (mA)
150
200
Efficiency vs. Output Current
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
DS-1628-00
TEL: 886-3-5772500 FAX: 886-3-5772510
www.analog.com.tw
1
1 page  
AIC1628
APPLICATION EXAMPLES
VIN CL
VREF
DHI
AIC1628
SHDN
DLOW
FB GND
R2
11.3K
R1
100K
*Fuse
60mΩ
**L1
47µH
D1
2SK940
Q1
VIN
+ C1 +5V ~ 11V
120µF
1N5819
+
VOUT
+12V
>150mA
* Buss Fuse MCR-2A
** Sumida RCH108
100
95
90
85
0
Efficiency vs Load Current
VIN=11V
VIN=5V
VIN=7V
VIN=9V
50 100 150 200 250 300 350
Load Current (mA)
Fig. 1 Flash memory programming supply
5V
+
C2
33µF
0.047µF
C3
VIN
VREF
SHDN
FB
CL
DHI
DLOW
GND
AIC1628
R2 R1
20K 470K
+
C1
Battery
Powered
+2V~ 5V
150µF
*L1
47µH
D1
1N5819
2SK940
Q1
+
C4
180µF
VOUT
+12V
>50mA
*Sumida RCH108
90
85
80
75 0
Efficiency vs Load Current
VIN=4V
VIN=3V
VIN=2V
50 100
Load Current (mA)
Fig. 2 2-cells to +12V Flash memory programmer
150
0.047µF
C2
VIN
VREF
SHDN
CL
DHI
DLOW
FB GND
AIC1628
RB
910
R2
17.5K
C6
0.033µF
R1
500K C5
0.1µF
C1 +
VIN
+4V~ 6V
150µF
*L1
150µH
D1
1N5819
Q1
2SC4672
+
C3
220µF
C4
0.1µF
VOUT
+30V
90
95
80
Efficiency vs Load Current
VIN=4V
VIN=5V
VIN=6V
*Sumida CD54
75 0
10
Fig. 3 4-cells to +30V power supply
20 30
Load Current (mA)
40
50
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet AIC1628CS.PDF ] | |
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