SG6846C Fairchild Semiconductor, SG6846C Datasheet - Page 5

• Manufacturer Part Number: SG6846C
• Description: The highly integrated PWM controller, SG6846C provides several features to enhance the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2007 Fairchild Semiconductor Corporation
SG6846C • Rev. 1.1.2
V
V
Feedback Input Section
Current Sense Section
Electrical Characteristics
V
DD
IN
DD
V
V
Symbol
t
t
t
SS-130KHz
V
V
D-VDDOVP
V
Z
V
V
V
SS-65KHz
V
V
V
I
STH1V-1/2
STH3V-1/2
V
t
V
I
Section
t
I
DD-OVP
V
D-OCP
DD-OVP
FB-OLP
D-OLP
= 15V, T
Section
DD-OFF
DD-ST
DD-OP
SENSE
t
SLOPE
Z
STH1V
STH3V
DD-ON
IN-OFF
DD-OP
DD-LH
t
A
IN-ON
LEB
FBO
PD
FB
V
A
Input Impedance
Delay to Output
Leading-edge Blanking Time
Slope Compensation
Threshold Voltage for Current Limit
Threshold Voltage for Current Limit
OCP Threshold Voltage for Current Limit
OCP Threshold Voltage for Current Limit
Delay Time for Over-Current Protection
Period During Start up Time
Input-Voltage to Current-Sense Attenuation
Input Impedance
FB Pin Open Voltage
Threshold Voltage of Open-loop Protection
Open-loop Protection Delay Time
= 25°C, unless noted.
Continuously Operating Voltage
Turn-on Threshold Voltage
Turn-off Voltage
Threshold Voltage for Latch-off Release
Start-up Current
Operating Supply Current
V
V
V
PWM Turn-off Threshold Voltage
PWM Turn-on Threshold Voltage
DD
DD
DD
Over-Voltage Protection (Latch off)
OVP Debounce Time
OVP Latch-off Holding Current
Parameter
5
V
GATE Open
R
V
R
Duty = DCY
V
V
V
V
R
R
R
DD-ON
DD
I
IN
IN
IN
IN
I
I
I
I
Test Condition
= 26kΩ
= 26kΩ
= 26kΩ
= 26kΩ
= 13kΩ
= 1V
= 3V
= 1V
= 3V
= 5V
– 0.16V
MAX
OFF
Min.
0.65
1/3.5
15.5
22.6
0.30
1.07
0.91
0.52
0.44
2.25
V
100
270
100
9.5
4.0
4.7
4.5
Continued on following page…
60
30
+0.1
8
3
IN-
OFF
Typ.
0.70
1/4.0
16.5
10.5
23.6
V
0.33
1.10
0.94
0.55
0.47
2.50
100
100
360
110
110
3.7
5.0
5.5
6.2
5.2
12
50
+0.2
0
4
8
IN-
OFF
0.75
Max.
1/4.5
V
0.36
1.13
0.97
0.58
0.50
2.75
17.5
11.5
24.6
250
120
140
120
5.5
5.0
7.0
5.7
+0.2
2
20
30
70
IN-
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5
Unit
V/V
mA
kΩ
ms
kΩ
ms
ms
ms
µA
µA
ns
ns
µs
V
V
V
V
V
V
V
V
V
V
V
V
V
V