FSB117H Fairchild Semiconductor, FSB117H Datasheet - Page 8

• Manufacturer Part Number: FSB117H
• Manufacturer: Fairchild Semiconductor

© 2011 Fairchild Semiconductor Corporation
FSB117H / FSB127H / FSB147H • Rev. 1.0.4
Electrical Characteristics
V
Feedback Input Section
IPK Pin Section
Symbol
V
V
V
DD
I
I
I
V
I
V
LMT-VA-H
LMT-FL-H
LMT-VA-L
LMT-FL-L
IPK-OPEN
V
V
FB-OPEN
t
V
V
FB-ZDCR
FB-OLP
D-OLP
FB-ZDC
=15V, T
Z
A
IPK-H
I
IPK-L
FB-N
FB-G
PK
FB
V
A
Internal Voltage Dividing Factor of FB Pin
Pull-Up Impedance of FB Pin
FB Pin Pull-Up Voltage
FB Voltage Threshold to Trigger Open-Loop
Protection
Delay of FB Pin Open-Loop Protection
FB Voltage Threshold to Exit Green Mode
FB Voltage Threshold to enter Green Mode
FB Voltage Threshold to Enter Zero-Duty
State
FB Voltage Threshold to Exit Zero-Duty State V
IPK Pin Open Voltage
Internal Upper Clamping Voltage of IPK Pin
Internal Lower Clamping Voltage of IPK Pin
Internal Current Source of IPK Pin
Current Limit Plateau when I
Pin Voltage is Internally Clamped
to Upper Limit
Initial Current Limit when I
Voltage is Internally Clamped to
Upper Limit
Current Limit Plateau when I
Pin Voltage is Internally Clamped
to Lower Limit
Initial Current Limit when I
Voltage is Internally Clamped to
Lower Limit
=25C unless otherwise specified.
Parameter
(Continued)
PK
PK
Pin
Pin
PK
PK
FSB117H
FSB127H
FSB147H
FSB117H
FSB127H
FSB147H
FSB117H
FSB127H
FSB147H
FSB117H
FSB127H
FSB147H
(12)
8
FB Pin Open
V
V
V
T
V
V
Duty>40%
V
Duty=0%
V
Duty>40%
V
Duty=0%
A
FB
FB
FB
FB
IPK
IPK
IPK
IPK
IPK
=-40 to 105°C,
Condition
=2.25V
=3V,
=3V,
=1.5V,
=1.5V,
is Rising
is Falling
is Falling
is Rising
1.5
Min.
1/4.5
1.95
0.72
0.90
1.35
0.36
0.45
0.67
5.2
4.3
2.4
3.0
Continued on the following page…
15
46
45
(12)
V
I
I
I
I
LMT-FL-H
I
I
LMT-FL-L
V
LMT-FL-H
LMT-FL-H
FB-N
LMT-FL-L
LMT-FL-L
Typ.
1/4.0
-0.20
-0.25
-0.10
-0.12
2.05
+0.1
0.80
1.00
1.50
0.37
0.40
0.50
0.75
0.18
FB-ZDC
5.4
4.6
2.6
3.5
21
56
50
-0.2
-
-
Max.
1/3.5
2.15
0.88
1.10
1.65
0.44
0.55
0.83
3
5.6
4.9
2.8
4.0
www.fairchildsemi.com
27
66
55
(12)
Unit
V/V
kΩ
ms
µA
V
V
V
V
V
V
V
V
V
A
A
A
A