SG6932 Fairchild Semiconductor, SG6932 Datasheet - Page 9

• Manufacturer Part Number: SG6932
• Description: The highly integrated SG6932 is designed for power supplies with boost PFC and forward PWM
• Manufacturer: Fairchild Semiconductor

© 2007 Fairchild Semiconductor Corporation
SG6932 • Rev. 1.1.3
Electrical Characteristics
V
PWM Stage
FBPWM
PWM Current Sense
Output Driver
Maximum Duty Cycle
Soft Start
FB
V
V
t
DD
t
Symbol
△V
OPEN-PWM-
V
DC
DC
DC-MAX-50%
DC-MAX-65%
OPEN-PWM
V
t
t
V
OPEN-LOOP
Bnk-PWM
t
PD-PWM
t
V
=15V, T
OH-PWM
Hiccup
OL-PWM
R-PWM
F-PWM
Z-PWM
Z
A
V
I
R
LIMIT
SS=6V
SS=5V
SS
SLOPE
FB
V
N
D
A
= 25°C unless otherwise noted.
FB to current Comparator Attenuation
Input Impedance
PWM Open-Loop Protection Voltage
Interval of PWM Open-Loop
Protection Reset
PWM Open-Loop Protection
Delay Time
Frequency Reduction Threshold on FBPWM
Propagation Delay to Output –
V
Peak Current Limit Threshold Voltage
Leading-Edge Blanking Time
Slope Compensation △V
Compensation Voltage Added to Current Sense
Output Voltage Maximum
(Clamp)
Output Voltage Low
Output Voltage High
Rising Time
Falling Time
Maximum Duty Cycle for SS=6V R
Maximum Duty Cycle for SS=5V R
Constant Current Output for
Soft-Start
Voltage of SS for 50% Maximum Duty Cycle
Voltage of SS for 65% Maximum Duty Cycle
Discharge Resistance
LIMIT
Loop
Parameter
(Continued)
S
=△V
SLOPE
R
R
V
Drops to 9V
V
V
V
V
O/P=2V to 9V
V
O/P=9V to 2V
R
DD
DD
DD
DD
DD
DD
I
I
I
I
I
=24kΩ
=24kΩ
(t
=24kΩ
=24kΩ
=24kΩ
on
=15V, OPWM
=20V
=15V; I
=13V; I
=15V; C
=15V; C
/t) △V
Conditions
9
O
O
S
L
L
=100mA
=100mA
:
=5nF;
=5nF;
60
0.65
Min.
0.40
500
270
2.2
4.2
1.9
80
30
30
62
46
44
4
8
6
0.70
Typ.
0.45
600
350
470
2.7
4.5
2.1
95
16
60
50
50
5
120
0.75
Max.
0.55
700
120
450
120
110
3.2
4.8
2.3
1.5
18
66
50
56
5
7
www.fairchildsemi.com
ns
V
Units
V/V
ms
ms
kΩ
μA
ns
ns
ns
%
%
V
V
V
V
V
V
V
V
Ω