FAN400A Fairchild Semiconductor, FAN400A Datasheet - Page 5

• Manufacturer Part Number: FAN400A
• Description: This highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
FAN400A Rev. 1.0.2
Electrical Characteristics
Unless otherwise noted, V
V
Feedback Input Section
Current-Sense Section
Symbol
V
V
V
DD
V
V
V
V
V
DD-G OFF
I
I
FB-OPEN
DD-OFF
DD-OP
DD-ST
DD-OP
DD-ON
Z
STHVA
STHFL
t
DD-FB
t
A
LEB
PD
Section
FB
V
Continuously Operation Voltage
Turn-on Threshold Voltage
Turn-off Threshold Voltage
Startup Current
Operating Supply Current
V
Green-off Mode
Input-Voltage to Current-Sense Attenuation
Input Impedance
Open-Loop Voltage
V
Propagation Delay
Current Limit Valley Threshold Voltage
Current Limit Flat Threshold Voltage
Leading-Edge Blanking Time
DD
DD
Low-threshold Voltage to Exit
Feedback Threshold Voltage
DD
Parameter
=15V and T
A
=25°C.
Figure 5.
With Secondary
Feedback
Without Secondary
Feedback
V
C
I
FB is Open
I
V
V
V
V
V
V
FB
FB
5
DD
DD
DD
DD
DD
DD
DD
L
=1nF
=0.1mA to 0.2mA
=0.4mA
Conditions
=V
=18V
=15V
=10V
=18V
=15V
=10V
Saw Limit
DD-ON
– 0.1V
Min.
20.7
18.4
250
7.5
4.5
16
V
DD-OFF
Typ.
22.7
20.4
0.81
0.73
0.58
1.10
1.01
0.81
310
100
8.0
3.6
0.3
4.6
17
8
+1.2
Max.
22.7
24.7
22.4
150
370
8.5
4.6
20
18
20
www.fairchildsemi.com
Units
V/V
mA
μA
kΩ
ns
ns
V
V
V
V
V
V
V
V
V
V
V
V
V
V