SG6902 Fairchild Semiconductor, SG6902 Datasheet - Page 6

• Manufacturer Part Number: SG6902
• Description: Green-Mode PFC / Flyback-PWM Controller
• Manufacturer: Fairchild Semiconductor

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Green-Mode PFC / Flyback-PWM Controller
Oscillator & Green-Mode Operation
Symbol
V
F
F
RI
RI
RI
VRMS for UVP and RANGE
* No delay for start-up.
PFC STAGE
Voltage Error Amplifier
Symbol
V
Av
Z
OVP
△OVP
T
V
G
V
G
I
I
UVP
V
T
*
© System General Corp.
Version 1.3.1 (IAO33.0022.B3)
Symbol
V
V
T
T
V
V
T
V
I
FBPFC-L
FBPFC-H
OH
OSC
OSC-MINFREQ
O
OVP-PFC
UVP-PFC
RI
D-PWM
UVP
RANGE
REF
FBPFC-H
FBPFC-L
FBHIGH
Not tested in production.
RMS-UVP-1
RMS-UVP-2
RMS-H
RMS-L
OL
FBPFC-H
FBPFC-L
OPEN
SHORT
*
-PFC
FBPFC
PFC
*
PFC
*
*
Parameter
RI Voltage
PWM Frequency
Minimum Frequency in Green Mode
RI Pin Resistance Range
RI Pin Open Protection
If RI> RI
RI Pin Short Protection
If RI< RI
Parameter
RMS AC Voltage Under-Voltage Protection Threshold
(with T
Recovery Level on VRMS
When UVP Occurs, Interval from PFC Off to PWM Off
Under-Voltage Protection Delay Time*
High V
Low V
Range Enable Delay Time
Output Low Voltage of RANGE Pin
Output High Leakage Current of RANGE Pin
Parameter
Reference Voltage
Open-Loop Gain
Output Impedance
PFC Over Voltage Protection (OVP Pin)
PFC Feedback Voltage Protection Hysteresis
Debounce Time of PFC OVP
Clamp-High Feedback Voltage
Clamp-High Gain
Clamp-Low Feedback Voltage
Clamp-Low Gain
Maximum Source Current
Maximum Sink Current
PFC Feedback Under-Voltage Protection
FB Open Voltage
Debounce Time of PFC UVP
RMS
UVP
RMS
open
short
Threshold for RANGE Comparator
Delay)
Threshold for RANGE Comparator
, SG6902 Turns Off
, SG6902 Turns Off
- 6 -
Test Conditions
R
R
Test Conditions
R
R
R
I
RANGE=5V
Test Conditions
R
R
o
=1mA
I
I
I
I
I
I
I
=24kΩ
=24kΩ
=24kΩ
=24kΩ
=24kΩ
=24kΩ
=24kΩ
www.sg.com.tw • www.fairchildsemi.com
Min.
1.176
62
18.0
15
Min.
0.75
V
+0.16V
T
9
150
1.90
1.55
145
Min.
2.95
3.20
60
40
3.10
2.75
1.5
70
0.35
6
40
UVP-Min
RMS-UVP-1
+
Typ.
1.200
65
20.0
200
2
Typ.
0.80
V
+0.18V
195
1.95
1.60
170
Typ.
3.00
60
110
3.25
90
70
3.15
0.5
2.85
6.5
2.0
110
0.40
7
70
Product Specification
RMS-UVP-1
Max.
1.224
68
22.5
47
Max.
0.85
V
+0.2V
T
14
240
2.00
1.65
200
0.5
50
Max.
3.05
3.30
120
120
3.20
2.90
0.45
8
120
September, 2007
UVP-Min
RMS-UVP-1
+
SG6902
Unit
V
KHz
KHz
KΩ
KΩ
KΩ
Unit
V
V
ms
ms
V
V
ms
V
nA
Unit
V
dB
KΩ
V
mV
µs
V
mA/V
V
mA/mV
mA
µA
V
V
µs