SG6859A Fairchild Semiconductor, SG6859A Datasheet - Page 6

• Manufacturer Part Number: SG6859A
• Description: This highly integrated PWM controller provides several special enhancements designed to meet the low standby-power needs of low-power SMPS
• Manufacturer: Fairchild Semiconductor

© 2007 Fairchild Semiconductor Corporation
SG6859A • Rev. 1.0.4
Electrical Characteristics
Unless otherwise noted, V
V
Feedback Input Section
Current-Sense Section
Oscillator Section
Output Section
V
Symbol
DD
V
t
V
DCY
GATE-CLAMP
V
D-VDDOVP
DCY
V
V
V
V
V
V
Z
V
DD-G OFF
V
I
I
FB-OPEN
t
V
V
f
DD-OFF
DD-OP
DD-OVP
DD-ST
D-OLP
T
OSC-G
GATE-H
DD-OP
DD-ON
Z
f
GATE-L
Section
SENSE
FB-OL
STHFL
STHVA
t
S
t
f
FB-N
FB-G
OSC
f
LEB
HOP
PD
DV
DT
FB
t
t
G
r
f
SAW
MAX
Continuously Operation Voltage
Turn-on Threshold Voltage
Turn-off Threshold Voltage
Startup Current
Operating Supply Current
V
V
V
Green-off Mode
Input Impedance
FB Output High Voltage
FB Open-loop Trigger Level
Delay of FB Pin Open-loop Protection
Green-Mode Entry FB Voltage
Green-Mode Ending FB Voltage
Green-Mode Modulation Slope
Input Impedance
Delay to Output
Flat Threshold Voltage for Current Limit
Valley Threshold Voltage for Current Limit
Leading-Edge Blanking Time
Duty Cycle of SAW Limit
Frequency
Hopping Period
Green-Mode Frequency
Frequency Variation vs. V
Frequency Variation vs. Temp. Deviation
Maximum Duty Cycle
Output Voltage Low
Output Voltage High
Rising Time
Falling Time
Output Clamp Voltage
DD
DD
DD
Over-Voltage Protection Level
Over-Voltage Protection Debounce
Low-Threshold Voltage to Exit
DD
=15V and T
Parameter
Center Frequency
Hopping Range
DD
A
=25°C.
Deviation
6
V
V
Auto Restart
Auto Restart
R
R
R
R
V
T
V
V
V
V
V
A
DD
DD
DD
DD
DD
DD
DD
DD
I
I
I
I
=95kΩ
=95kΩ
=95kΩ
=95kΩ
=-20 to 85°C
=V
=15V, C
=13.5 to 22V
=15V, I
=13.5V, I
=15V, C
=15V, C
=22V
Conditions
DD-ON
O
L
– 0.1V
L
L
=20mA
=1nF
O
=1nF
=1nF
=20mA
Min.
15.5
0.75
2.60
270
8.5
4.3
24
40
10
40
65
62
16
5
8
0
OFF
Typ.
16.5
2.85
0.80
0.02
V
±4.9
125
320
150
9.5
3.0
4.6
2.2
3.7
25
56
75
55
40
70
20
67
55
17
9
5
1
DD-
+ 1
Max. Units
17.5
10.5
3.10
0.85
2.00
100
100
370
3.5
4.9
1.4
22
15
26
75
72
18
2
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Hz/mV
kHz
kHz
mA
ms
ms
μA
kΩ
kΩ
μs
ns
ns
ns
ns
%
%
%
%
V
V
V
V
V
V
V
V
V
V
V
V
V
V