SG5842JA Fairchild Semiconductor, SG5842JA Datasheet - Page 7

• Manufacturer Part Number: SG5842JA
• Description: The highly integrated SG5842A/JA series of PWM controllers provides several features to enhance the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2007 Fairchild Semiconductor Corporation
SG5842A/SG582JA • Rev. 1.4.3
Electrical Characteristics
V
Current Sense Section
Symbol
DCY
DCY
DD
V
V
Z
V
V
V
V
CLAMP
t
GATE-H
D-OTP
GATE-L
SENSE
STHVA
t
= 15V and T
STHFL
GATE-
t
I
RTTH
LEB
I
PD
RT
t
t
O
r
f
SAW
MAX
Input Impedance
Current Limit Flatten Threshold
Voltage
Current Limit Valley Threshold
Voltage
Duty Cycle of SAW Limit
Propagation Delay to GATE Output
Leading-Edge Blanking Time
Maximum Duty Cycle
Output Voltage Low
Output Voltage High
Rising Time
Falling Time
Peak Output Current
Gate Output Clamping Voltage
Output Current of RT Pin
Over-Temperature Protection
Threshold Voltage
Over-Temperature Debounce
J
=T
A
= -40~125°C, unless otherwise noted.
Parameter
(Continued)
Figure 5. V
V
R
R
V
V
V
V
V
V
R
R
Maximum Duty Cycle
GATE Section
STHFL
DD
DD
DD
DD
DD
DD
I
I
I
I
=26KΩ
=26KΩ
=26KΩ
=26KΩ
FB
RT Section
=15V, I
=12.5V, I
=15V, C
=15V, C
=15V, GATE=6V
=20V
Conditions
vs. PWM Frequency
–V
7
STHVA
O
L
L
=50mA
=1nF
=1nF
O
=-50mA
1.015
Min.
0.85
200
150
230
7.5
60
30
67
60
1.050
Typ.
0.90
0.22
150
270
250
100
12
45
65
50
18
70
1.085
Max.
0.95
200
350
350
140
1.5
70
90
19
73
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Units
mA
KΩ
µA
µs
ns
ns
ns
ns
%
%
V
V
V
V
V
V