SG6903 Fairchild Semiconductor, SG6903 Datasheet - Page 8

• Manufacturer Part Number: SG6903
• Manufacturer: Fairchild Semiconductor

Green Mode PFC/Flyback-PWM Controller
PWM Stage
FBPWM
Symbol
A
Z
I
FB
t
V
V
t
V
V
V
V
V
S
V
PWM-Current Sense
Symbol
t
V
V
t
△V
PWM Output Driver
Symbol
V
V
V
t
t
DCY
© System General Corp.
Version 1.0.1 (IAO33.0061.B0)
FB
OPEN-PWM
PFC-OFF
PD-PWM
LEB-PWM
R-PWM
F-PWM
FB
v-PWM
PFC-OFF 1
PFC-OFF 2
PFC-ON 1.6
PFC-ON 2.85
PFC-ON 0.8
PFC-ON 1.95
N
G
G
LIMIT-1
LIMIT-2
Z-PWM
OL-PWM
OH-PWM
OPEN-LOOP
SLOPE
MAXPWM
Parameter
FB to Current Comparator Attenuation
Input Impedance
Maximum Source Current
PWM Open Loop Protection voltage
PWM Open Loop Protection Delay Time
PFC off Voltage at FBPWM
PFC off Voltage at FBPWM
PFC Off Propagation Delay Time
PFC on Voltage at FBPWM
PFC on Voltage at FBPWM
PFC on Voltage at FBPWM
PFC on Voltage at FBPWM
Frequency Reduction Threshold on FBPWM
Green-Mode Modulation Slope
Voltage on FBPWM at Fs = 20KHz
Parameter
Propagation Delay to Output
Peak Current Limit Threshold Voltage1
Peak Current Limit Threshold Voltage2
Leading-Edge Blanking Time
Slope Compensation
△V
△V
Current Sense
Parameter
Output Voltage Maximum (Clamp)
Output Voltage Low
Output Voltage High
Rising Time
Falling Time
Maximum Duty Cycle
S
S
: Compensation Voltage Added to
= △V
SLOPE
x (T
on
/T)
Test Conditions
RANGE = Ground
RANGE = Open
RANGE = Ground; VRMS =1.6V
RANGE = Ground; VRMS =2.85V
RANGE = Open; VRMS =0.8V
RANGE = Open; VRMS =1.95V
RANGE = Ground
Test Conditions
VDD = 15V,OPWM <= 9V
RANGE = Open
RANGE = Ground
Test Conditions
V
V
V
V
V
DD
DD
DD
DD
DD
- 8 -
= 20V
= 15V; I
= 13V; I
= 15V; C
= 15V; C
O
O
L
L
= 100mA
= 100mA
= 5nF; O/P= 2V to 9V 30
= 5nF; O/P= 9V to 2V 30
www.sg.com.tw • www.fairchildsemi.com
Min.
8
73
Min.
60
0.65
0.6
270
0.45
Min.
2.5
4
0.8
4.2
45
450
1.9
60
1.35
Product Specification
Typ.
16
60
50
78
Typ.
0.7
0.65
350
0.5
Typ.
3.1
5
1.2
4.5
56
V
V
V
V
600
V
5V
V
5V
V
5V
V
V
2.1
75
1.6
G
G
G
G
G
G
+0.2
+0.2
+0.3
+0.3
+0.8
+0.5
September 28, 2007
Max.
18
1.5
120
110
83
Max.
120
0.75
0.7
450
0.55
Max.
3.5
7
1.5
4.8
70
750
2.3
90
1.75
SG6903
Unit
ns
V
V
ns
V
Unit
V
V
V
ns
ns
%
Unit
V/V
KΩ
mA
V
ms
V
V
ms
V
V
V
V
V
Hz/V
V