SG6846A Fairchild Semiconductor, SG6846A Datasheet - Page 8
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SG6846A
Manufacturer Part Number
SG6846A
Description
The highly integrated SG6846A series of PWM controllers provides features to enhance the performance of flyback converters
Manufacturer
Fairchild Semiconductor
Datasheet
1.SG6846A.pdf
(15 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SG6846ALSZ
Manufacturer:
SYSTEMGE
Quantity:
20 000
© 2008 Fairchild Semiconductor Corporation
SG6846A • Rev. 1.1.5
PWM Output Section
Over-Temperature Protection (OTP) Section
R
Electrical Characteristics
V
Note:
1.
t
I
DD
Symbol
DOTP-LATCH
DCY
R
Section
V
V
RI
RI
RI
= 15V and T
V
RT-OFF
V
CLAMP
The relationship between R
I
RTTH
t
t
RT
NOR
MAX
OH
OL
R
MIN
F
MAX
Maximum Duty Cycle
Output Voltage Low
Output Voltage High
Rising Time
Falling Time
Gate Output Clamping Voltage
Output Current of RT Pin
Threshold Voltage for OTP
Over-Temperature Latch-off Debounce
Equivalent Impedance of RT for OTP
R
Maximum R
Minimum R
I
A
Operating Range
= 25°C unless otherwise noted.
I
I
Value for Protection
Value for Protection
Parameter
RT-OFF
(Continued)
and R
I
Figure 7. PWM Frequency
is:
R
RT
(1)
(1)
-
OFF
8
V
V
V
GATE = 1nF
GATE = 1nF
V
R
R
R
OTP
DD
DD
DD
I
I
I
Test Condition
= 26kΩ
= 26kΩ
= 26kΩ
-
LATCH
= 15V, I
= 12V, I
= 20V
-
OFF
O
O
I /
= 50mA
= 50mA
RT
V
RT
/
1.015
Min.
(70
80
64
14
13
10
8
A
1.065
Typ.
26
350
100
85
50
70
15
/
R
I
(K
1.115
Max.
1.5
90
18
76
16
36
6
www.fairchildsemi.com
))
Unit
MΩ
µA
ms
kΩ
kΩ
kΩ
ns
ns
%
V
V
V
V
(1)