FAN6861 Fairchild Semiconductor, FAN6861 Datasheet - Page 6

• Manufacturer Part Number: FAN6861
• Description: A highly integrated PWM controller, FAN6861 provides several features to enhance the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN6861 • Rev. 1.0.1
Oscillator Section
PWM Output Section
Over-Temperature Protection (OTP) Section
Electrical Characteristics
V
t
t
DOTP2-LATCH
DD
DOTP-LATCH
Symbol
DCY
V
V
f
V
V
V
V
V
t
t
OSC-G
FB-ZDC
f
V
= 15V and T
V
CLAMP
hop-1
hop-3
OSC
S
f
f
I
OTP1
OTP2
FB-N
FB-G
DV
t
t
RTO
DT
RT
OH
OL
R
F
G
MAX
Normal PWM Frequency
Jitter Period 1
Jitter Period 3
Green-Mode Minimum Frequency
Beginning of Green-On
Mode at FB Level
Beginning of Green-Off
Mode at FB Level
Slope for Green-Mode Modulation
FB Threshold Voltage for Zero-duty
Frequency Variation vs. V
Frequency Variation vs. Temperature
Deviation
Maximum Duty Cycle
Output Voltage LOW
Output Voltage HIGH
Rising Time
Falling Time
Gate Output Clamping Voltage
Output Current of RT Pin
RT Pin Open Voltage
Threshold Voltage for Over-Temperature
Protection
Over-Temperature Latch-Off Debounce
Second Threshold Voltage for Over-
Temperature Protection
Second Over-Temperature Latch-Off
Debounce
A
= 25°C, unless otherwise noted.
Parameter
(Continued)
DD
Center
Frequency
Jitter Range
Pin, FB Voltage
Pin, FB Voltage
Deviation
6
V
V
V
V
V
V
T
V
50mA
V
50mA
GATE = 1nF
GATE = 1nF
V
V
V
A
FB
FB
FB
FB
FB
DD
DD
DD
DD
FB
FB
Test Condition
= -30 to 85°C
> V
≥ V
= V
≥ V
= V
= V
= V
= 11.5V to 20V
= 15V, I
= 12V, I
= 20V
FB-N
FB-N
FB-N
FB-G
FB-G
FB-N
FB-G
O
O
=
=
±1.27
15.00
Min.
±3.7
10.2
18.0
2.60
0.92
0.65
3.9
2.0
1.7
60
65
90
15
40
50
0
8
±1.45
16.75
Typ.
±4.2
11.5
22.5
2.85
0.02
1.00
0.70
230
100
4.4
2.2
1.9
3.7
65
65
70
30
17
51
99
Max.
±1.63
18.50
±4.7
12.8
25.0
3.10
2.00
1.08
0.75
150
108
4.9
2.4
2.1
1.5
70
75
19
62
2
www.fairchildsemi.com
Hz/mV
Unit
kHz
kHz
ms
ms
ms
μA
ns
ns
μs
%
%
%
V
V
V
V
V
V
V
V
V