FAN4800I Fairchild Semiconductor, FAN4800I Datasheet - Page 6

• Manufacturer Part Number: FAN4800I
• Description: The FAN4800 is a controller for power-factor-corrected, switched-mode power supplies
• Manufacturer: Fairchild Semiconductor

FAN4800 Rev. 1.0.6
© 2005 Fairchild Semiconductor Corporation
Electrical Characteristics
Unless otherwise stated, these specifications apply: V
PFC I
DC I
V
GAIN MODULATOR
OSCILLATOR
REFERENCE
t
V
d
IN
Symbol
(pwm_off)
t
th(cs)
HY(OK)
Vo(gm)
d(pfc_off)
V
V
V
ΔV
ΔV
ΔV
ΔV
Δf
Δf
V
f
f
t
V
V
OK COMPARATOR
th(DC)
th(OK)
BW
dead
th(cs)
G1
G2
G3
G4
osc1
osc2
LIMIT
I
ramp
osc1
osc2
dis
ref1
ref2
LIMIT
ref1
ref2
ref4
ref5
-V
gm
COMPARATOR
COMPARATOR
Threshold Voltage
(PFC I
Output)
Delay to Output
Threshold Voltage
Threshold Voltage
Hysteresis
Gain
Output Voltage
= 3.5kΩ x (I
Initial Accuracy
Voltage Stability
Temperature Stability
Total Variation
Ramp Valley to Peak Voltage
PFC Dead Time
CT Discharge Current
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
Total Variation
Long Term Stability
Delay to Output
Band Width
(3)
LIMIT
Parameter
V
(1)
SENSE
TH
(1)
(1)
(1)
– Gain Modulator
– I
(1)
OFFSET
(Continued)
)
(1)
I
V
I
V
I
V
I
V
I
I
V
T
11V < V
Line, Temp
V
T
11V < V
0mA < I(V
Line, Load, Temperature
T
AC
AC
AC
AC
AC
AC
CC
A
A
J
FB
FB
FB
FB
FB
RAMP2
= 125°C, 1000 hours
= 25°C
= 25°C, I(V
= 100μA, V
= 100μA, V
= 150μA, V
= 300μA, V
= 100μA
= 250μA, V
= 15V, R
= 1V, T
= 1V, T
= 1V, T
= 1V, T
= 2V, T
6
CC
CC
= 0V, V
Condition
REF
< 16.5V
< 16.5V
A
A
A
A
A
T
= 25°C
= 25°C
= 25°C
= 25°C
= 25°C
) < 7mA
REF
= 52.3kΩ, C
RMS
RMS
RMS
RMS
RMS
RAMP1
) = 1mA
= 0,
= 1.1V,
= 1.8V,
= 3.3V,
= 1.1V,
= 2.5V
T
= 470pF, and T
Min.
-1.10
0.95
2.10
0.70
1.80
0.90
0.25
0.80
7.35
0.8
6.5
7.4
68
66
5
5
-1.00
Typ.
1.00
0.84
2.00
1.00
0.32
1.00
2.75
100
250
250
685
1.0
7.5
0.4
10
10
10
1
2
A
= -40°C to 125°C.
Max.
-0.90
7.65
1.05
2.45
0.95
2.20
1.10
0.40
1.20
15.0
1.2
7.6
81
84
25
20
25
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Gain
Unit
MHz
kHz
kHz
mV
mA
mV
mV
mV
ns
ns
ns
%
%
%
V
V
V
V
V
V
V
V
(3)