SG6901 Fairchild Semiconductor, SG6901 Datasheet - Page 10

• Manufacturer Part Number: SG6901
• Description: The highly integrated SG6901A is designed for power supplies with boost PFC and flyback PWM
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
SG6901A • Rev. 1.0.2
Electrical Characteristics
V
PWM CURRENT SENSE
PWM OUTOUT DRIVER
OTP SECTION
SOFT START SECTION
DD
DCY
Symbol
△V
V
=15V and T
V
t
V
V
t
V
V
LEB-PWM
V
t
PD-PWM
t
OH-PWM
OTP-OFF
OL-PWM
R-PWM
F-PWM
OTP-ON
LIMIT-1
LIMIT-2
Z-PWM
I
t
OTP
OTP
I
R
MAXPWM
SS
SLOPE
D
A
=25°C unless otherwise specified.
Propagation Delay to
Output
Peak Current Limit
Threshold Voltage1
Peak Current Limit
Threshold Voltage2
Leading-Edge Blanking
Time
Slope Compensation
Output Voltage Maximum
(Clamp)
Output Voltage Low
Output Voltage High
Rising Time
Falling Time
Maximum Duty Cycle
OTP Pin Output Current
Recovery Level on OTP
OTP Threshold Voltage
OTP Debounce Time
Constant Current Output
for Soft-Start
Discharge R
Parameter
DSON
V
RANGE=Open
RANGE=Ground
△V
△V
Voltage Added to Current
Sense
V
V
V
V
O/P=2V to 9V
V
O/P=9V to 2V
R
R
DD
DD
DD
DD
DD
DD
I
T
=24KΩ
=24KΩ
=15V, OPWM<=9V
=20V
=15V; I
=13V; I
=15V; C
=15V; C
S
S
=△V
: Compensation
Conditions
SLOPE
O
O
L
L
=100mA
=100mA
=5nF;
=5nF;
10
x (T
on
/T)
Min.
0.65
0.60
0.45
1.35
1.15
270
60
30
30
73
90
44
8
8
Typ.
0.70
0.65
0.50
1.40
1.20
350
100
470
16
60
50
78
50
Max.
0.75
0.70
0.55
1.45
1.25
450
120
110
110
120
1.5
18
83
25
56
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Units
µA
µA
ns
ns
ns
ns
µs
%
V
V
V
V
V
Ω
V
V
V