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PDF FAN7601 Data sheet ( Hoja de datos )
| Número de pieza | FAN7601 | |
| Descripción | Green Current Mode PWM Controller | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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FAN7601
Green Current Mode PWM Controller
www.fairchildsemi.com
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.
10-SSOP 8-SOP
8-DIP
1 11
Internal Block Diagram
Vref (10)
8
Rt/Ct
(5)
4
OSC
Vref
12uA
Latch/SS
(4)
3
1.5V
OVP
+
−
2.5V
1V
GND
(6)
5
+
− Start-up
Circuit
Vstr (1)
1
5V Ref
Enable
Start-up
Circuit
OVP +
−
7
Vcc
(8)
19V
UVLO +
−
12V/8V
S
R
Q
S
R
Q
Reset
Circuit
6
OUT
(7)
Delay Circuit
+
−
0.97V/0.9V
2
CS/FB
(3)
+− Latch/SS
−
1V
* ( ) is 10-SSOP PIN Number
©2003 Fairchild Semiconductor Corporation
Rev. 1.0.1
1 page  
Typical Performance Characteristics
FAN7601
5.15
5.10
5.05
5.00
4.95
4.90
4.85
-50
0 50 100
JunctionTemperature(°C)
150
Figure 1. Trimmed Reference Voltage
13.0
12.5
12.0
11.5
11.0
-50
0 50 100
JunctionTemperature(°C)
150
Figure 3. Vcc Start Threshold Voltage
110
105
100
95
90
-50
0 50 100
JunctionTemperature(°C)
150
Figure 5. Oscillator Frequency
3.0
2.8
2.6
2.4
2.2
2.0
-50
0 50 100
JunctionTemperature(°C)
150
Figure 2. Supply Current
9.0
8.5
8.0
7.5
7.0
-50
0 50 100
JunctionTemperature(°C)
150
Figure 4. Vcc Stop Threshold Voltage
100
98
96
94
92
90
-50
0 50 100
JunctionTemperature(°C)
150
Figure 6. Maximum Duty Cycle
5
5 Page 
Ordering Information
Device
FAN7601N
FAN7601M
FAN7601G
Package
8-DIP
8-SOP
10-SSOP
Operating Temp.
-25°C ~ 125°C
FAN7601
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet FAN7601.PDF ] | |
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