參數資料
型號: FAN7601M
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: Green Current Mode PWM Controller
中文描述: 0.25 A SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO8
封裝: LEAD FREE, SOP-8
文件頁數: 1/12頁
文件大小: 411K
代理商: FAN7601M
2003 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.1
Features
Green Current Mode PWM Control
Low Operating Current: Max 4mA
Burst Mode Operation
Internal High Voltage Start-up Switch
Under Voltage Lockout (UVLO): 12V/8V
Latch Protection & Soft Start Function
Over Voltage Protection: 19V
Operating Frequency up to 300kHz
Max Duty Cycle: 95%
Typical Applications
Off-Line Adapter Applications
Auxiliary Power Supplies
Description
The FAN7601 is a green programmable frequency current
mode PWM controller. It is specially designed for the
off-line adapter application and the auxiliary power supplies
which require high efficiency at a light load and no load.
The internal high voltage start-up switch and the burst mode
reduce the power loss. The FAN7601 includes some
protections such as latch protection and over voltage
protection. The latch protection can be used for over voltage
protection and/or thermal protection and so on. And the soft
start prevents the output voltage over shoot at start up.
8-SOP
1
8-DIP
1
10-SSOP
1
Internal Block Diagram
* ( ) is 10-SSOP PIN Number
Latch/SS
Delay Circuit
1V
Enable
+
GND
(6)
Start-up
Circuit
2.5V
1.5V
Start-up
Circuit
5V Ref
Vcc
(8)
Vref (10)
8
Rt/Ct
(5)
Latch/SS
(4)
OUT
(7)
CS/FB
(3)
UVLO
12uA
Vref
7
19V
OVP
+
+
+
12V/8V
6
2
+
0.97V/0.9V
1
R
Q
S
OSC
4
3
+
OVP
R
Q
S
Reset
Circuit
+
5
Vstr (1)
1V
FAN7601
Green Current Mode PWM Controller
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