SG6846B Fairchild Semiconductor, SG6846B Datasheet - Page 2

• Manufacturer Part Number: SG6846B
• Description: The highly integrated PWM controller, SG6846B, provides several features to enhance the performance of fly-back converters
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
SG6846B • Rev. 1.3.4
Typical Application
Block Diagram
VDD 7
VIN
RT
3
5
AC input
N
L
0.9V/0.7V
I
RT
1.05V
V
23.6V
16.5V/10.5V
Filter
EMI
DD
3
4
2
-TH-G
UVLO
FB
VIN
RI
SG6846B
VDD
GND
Latch
Over Power Compersation
7
1
Debounce
SENSE
OTP
Delay
GATE
0.895-0.065
RT
Figure 1. Typical Application
+
Internal
BIAS
8
6
5
Figure 2. Block Diagram
+
X
V
+
IN
GND
OCP
Delay
SCP
Delay
2
1
Q
R
S
OSC
Compensation
Slope
1R
+
+
Green
Mode
2R
1.15V
Soft
Driver
1R
4
3R
Blanking
Circuit
VDD
VO-
VO+
6.2V
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8
2
6
SENSE
GATE
FB