PFS757HG POWERINT [Power Integrations, Inc.], PFS757HG Datasheet - Page 18

• Manufacturer Part Number: PFS757HG
• Description: Combined Two-Switch Forward and Flyback Power Supply Controllers with Integrated High Voltage MOSFETs
• Manufacturer: POWERINT [Power Integrations, Inc.]

Rev. C 02/11
Figure 22. Input OVP (Latching).
Figure 23. Non-latching Input OVP.
18
TFS757-764HG
I
L(OV)
R
R
1
1
=
+ R
10 kΩ
VR1 - 1.9 V
10 kΩ
I
=
L(OV)
R
R
R
1
2
1
V
I
1
L(OV)
=
= 4 MΩ
+ R
300 kΩ
IN(OV)
+ R
VR1 - 1.9 V
=
20 kΩ
R
2
V
I
2
1
L(OV)
= 4 MΩ
IN(OV)
+ R
2
Q1
V
V
BIAS
BIAS
100 kΩ
100 kΩ
(+12 V)
(+12 V)
VR1
VR1
90 kΩ
90 kΩ
R
R
1
1
V
V
IN
IN
3.9 MΩ
3.9 MΩ
R
R
2
2
FB
EN
BP
EN
BP
FB
R
L
R
L
HiperTFS
HiperTFS
CONTROL
CONTROL
G
VDDH
G
VDDH
S
S
HD
HS
D
DSB
HD
HS
D
DSB
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