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參數(shù)資料
| 型號(hào)： | AIC1578CN |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | CAP 33UF 50V ELECT TG SMD |
| 中文描述： | 高效率，降壓型DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 1/7頁 |
| 文件大?。?/td> | 266K |
| 代理商： | AIC1578CN |
AIC1578
High-Efficiency, Step-Down DC/DC Converter
Analog Integrations Corporation
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
www.analog.com.tw
DS-1578-02 Dec 27, 00
TEL: 886-3-5772500
FAX: 886-3-5772510
1
FEATURES
4V to 20V Input Voltage Operation.
High Efficiency (up to 95%).
Low Quiescent Current at 90
μ
A.
Pulse-Skipping and Pulse-Frequency Modulation.
Inputs-Uncommitted Current Sense Comparator.
Duty Cycle Adjustable.
90KHz to 280KHz Oscillator Frequency.
Power-Saving Shutdown Mode (8
μ
A Typical).
Push-Pull Driver Output.
APPLICATIONS
Notebook 5V/3.3V Main Power
Step-Down DC/DC Converter Module.
Constant Current Source for Battery Chargers.
TYPICAL APPLICATION CIRCUIT
CS+
CS -
DRI
DUTY
FB
GND
SHDN
VIN
C4
1
μ
F
C3
B
D2
**Charge current=57mV/RS
+
1
220
μ
F
33
μ
H
* L1
AIC1578
**RS
+
Q1
C2
0
μ
F
D1
1N5820
R
DUTY
1M
R2
1M
C1
Control
*Sumida MPP CORE
V
IN
+
IRF9Z34
1
μ
F
Constant Current Source for Battery Charger
DESCRIPTION
The AIC1578 is a high performance step-down
DC/DC converter, designed to drive an external
P-channel MOSFET to generate programmable
output voltages. Two main schemes of Pulse-
Skipping and Pulse-Frequency Modulation are
employed to maintain low quiescent current and
high conversion efficiency under wide ranges of
input voltage and loading condition. The
AIC1578 delivers 10mA to 2A of output current
with 87%~93% efficiency at V
IN
=9V, V
OUT
=5V
condition. A current sense comparator with both
inverting and non-inverting input uncommitted is
included to provide the crucial function of either
current limit protection or constant output current
control. When the AIC1578 is used in a high-side
current sensing step-down constant current
source, the efficiency is typically greater than
90%. Duty cycle can be adjusted to greater than
90% by connecting a resistor from DUTY pin to
V
IN
. Quiescent current is about 90
μ
A and can be
reduced to 8
μ
A in shutdown mode. Switching
frequency being in around 90KHz to 280KHz
range, small size switching components are ideal
for battery powered portable equipment.
ORDERING INFORMATION
AIC1578 XX
ORDER NUMBER
AIC1578CN
(PLASTIC DIP)
PIN CONFIGURATION
AIC1578CS
(PLASTIC SO)
TOP VIEW
DRI
CS+
DUTY
FB
CS-
GND
VIN
SHDN
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
TEMPERATURE RANGE
C: 0
°
C~+70
°
C
1
3
4
2
8
6
5
7
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AIC1578CS | CAP 33UF 50V ELECT TG SMD |
| AIC1578 | High-Efficiency, Step-Down DC/DC Converter |
| AIC1579CN | CAP 47UF 63V ELECT TG SMD |
| AIC1579 | Isolated Flyback Switching Regulator with 9V Output |
| AIC1579CS | CAP 10UF 80V ELECT TG SMD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AIC1578CS | 制造商:AIC 制造商全稱:Analog Intergrations Corporation 功能描述:High-Efficiency, Step-Down DC/DC Converter |
| AIC1578GNTB | 制造商:undefined 功能描述:STEP-DOWN DC/DC CONTROLLER |
| AIC1578PNTB | 制造商:undefined 功能描述:STEP-DOWN DC/DC CONTROLLER |
| AIC1579 | 制造商:AIC 制造商全稱:Analog Intergrations Corporation 功能描述:Step-Down Switching Regulator Controller |
| AIC1579CN | 制造商:AIC 制造商全稱:Analog Intergrations Corporation 功能描述:Step-Down Switching Regulator Controller |
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