FSB117HNY Datasheet, PDF (3/18 Pages) Fairchild Semiconductor – mWSaver™ Fairchild Power Switch (FPS™)

Internal Block Diagram
HV
5
HV
Startup
VDD 2
Line Voltage
Sample Circuit
Brownout Protection
UVLO
12V/6V
Internal
BIAS
OSC1
…
Clock
Generator
Green
Mode
IPK 4
VDD-OVP
Debounce
OVP
OSC2
3.5V
IPK _50µA
PWM
VMAX
S/H
Current Limit
Compensation
VLimit
Auto-Re-start
Protection
OVP
OLP
OTP
Soft
Driver
Drain
6,7,8
PWM
SQ
R
Soft-Start
Comparator
Current-Limit
Comparator
PWM
Comparator
Maximum Duty
CycleLimit
Soft-Start
VLimit
Slope
Compensation
3R
R
OLP
OLP
Delay
OLP
Comparator
4.6V
5.4V
ZFB
1 GND
3 FB
Figure 2. Block Diagram
© 2011 Fairchild Semiconductor Corporation
FSB117H / FSB127H / FSB147H • Rev. 1.0.7
3
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