FSB127H Fairchild Semiconductor, FSB127H Datasheet - Page 3

• Manufacturer Part Number: FSB127H
• Manufacturer: Fairchild Semiconductor

© 2011 Fairchild Semiconductor Corporation
FSB117H / FSB127H / FSB147H • Rev. 1.0.4
Internal Block Diagram
VDD
IPK
2
4
Startup
HV
HV
5
I
PK
3.5V
50µA
S/H
12V/6V
V
DD-OVP
Sample Circuit
PWM
Line Voltage
UVLO
Compensation
Current Limit
Debounce
OSC2
Internal
BIAS
Generator
V
Brownout Protection
Clock
OVP
MAX
Figure 2. Block Diagram
V
Limit
Green
Mode
OSC1
…
OLP
Maximum Duty
CycleLimit
3
S
R
Auto-Re-start
Delay
Q
OLP
Protection
Current-Limit
Comparator
Comparator
Comparator
Soft-Start
PWM
Comparator
OLP
OVP
OLP
OTP
Compensation
Driver
Soft
Soft-Start
V
R
Slope
4.6V
Limit
3R
PWM
6,7,8
Drain
5.4V
Z
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FB
1
3
GND
FB