FAN6791 Fairchild Semiconductor, FAN6791 Datasheet - Page 8

• Manufacturer Part Number: FAN6791
• Description: The highly integrated FAN6791/3 dual PWM combination controller provides several features to enhance the performance of converters
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
FAN6791 / FAN6793 • Rev. 1.0.3
Electrical Characteristics
V
V
HV
Oscillator and Green-Mode Operation
V
VREF
DD
DD
RMS
Symbol
f
V
I
OSC-G-MIN
RI
V
△V
△V
V
V
V
V
I
I
V
RI
REF_MAX
I
=18V; R
I
I
RMS-OFF
DD-OP1
DD-OP2
TH-OLP
RMS-ON
Section
DD-OVP
V
TH-OFF
TH-OLP
HV-CS
t
DD ST
t
f
DD-OP
TH-ON
V
SHORT
OVP
OSC
RMS
I
RI
OPEN
for AC Brownout Protection
I
REF
OS
D
RI
REF1
REF2
I
=24kΩ;T
Continuously Operating Voltage
Startup Current
Operating Current 1
Operating Current 2
Start Threshold Voltage
Minimum Operating Voltage
I
Internal Sink Current
V
(Turn Off PWM with Delay)
V
Debounce
Maximum Input Current
Internal Current Source
RI Voltage
Normal PWM Frequency
Minimum Frequency in Green
Mode
RI Range
RI Pin Open Protection
RI Pin Short Protection
Off Threshold Voltage for AC
Brownout Protection
Start Threshold Voltage for AC
Brownout Protection
AC Brownout Protection
Debounce Time
Reference voltage
Load Regulation of Reference
Voltage
Line Regulation of Reference
Voltage
Maximum Current
V
DD-OLP
DD
DD
REF
Over-Voltage Protection
Over-Voltage Protection
Short Current
A
Off Voltage
=25°C, unless noted.
Parameter
V
V
V
V
I
V
V
V
HV=500V,V
Center Frequency,
R
Jitter Range
R
If RI > RI
Turned Off
If RI > RI
Turned Off
R
I
C
I
C
V
V
REF
REF
REF
DD
DD
DD
TH-OLP
DD-OVP
AC
DD
DD
DD
I
I
I
REF
REF
=24kΩ
=24kΩ
=24kΩ
=15V; GATE Open
=15V; GATE Open,
=10mA
=90V(V
=10µF
=1mA, C
=1mA to 10mA
=12V to 22V
=15V
– 0.16V
=0.1µF,
=0.1µF,
Conditions
=26V
+0.1V
OPEN
SHORT
8
DC
DD
REF
, PWM
=120V),
=15V
, PWM
=0.1µF
V
RMS-UVP-1
1.176
+0.17
Min.
23.4
±3.7
0.75
4.75
150
6.5
1.5
15
70
80
62
18
12
10
15
9
1
V
RMS-UVP-1
+0.19
1.200
Typ.
24.5
±4.2
0.80
5.00
100
195
7.5
2.5
10
16
16
10
80
10
65
20
24
20
6
V
RMS-UVP-1
1.224
+0.21
Max.
25.5
±4.7
0.85
5.25
100
120
240
8.0
3.5
22
50
10
20
17
11
50
68
22
47
80
25
15
25
6
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Units
kHz
kHz
mA
mA
mA
MΩ
mV
mV
mA
mA
kΩ
ms
μA
μA
μA
kΩ
μs
V
V
V
V
V
V
V
V
V