FAN302UL Fairchild Semiconductor, FAN302UL Datasheet - Page 6

• Manufacturer Part Number: FAN302UL
• Description: This highly integrated PWM controller provides several features to enhance the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2011 Fairchild Semiconductor Corporation
FAN302UL • Rev. 1.0.2
Electrical Characteristics
V
Voltage-Sense Section
V
Current-Sense Section
GATE Section
Notes:
4.
5.
6.
V
V
Symbol
DCY
DD
V
V
V
VS-CM-MAX
VS-OFFSET
V
V
VS-CM-MIN
V
t
V
V
I
V
S
CLAMP
VS-UVP
VS-OVP
V
V
VS-OVP
GATE-H
GATE-H
STH-VA
GATE-L
V
t
SLOPE
SN-CC
SG-CC
t
=15V and T
GATE-
I
t
G-CC
MIN
LEB
CCR
STH
TC
PD
f
A
Not tested; guaranteed by design.
t
t
VR
r
f
OSC-CM-MIN
MAX
V
is a scale-down ratio of the internal voltage divider of the FB pin.
Bias Current
V
Pulse-by-Pulse Current Limit in Power Limit
Mode
V
Normal Pulse-by-Pulse Current Limit
V
Decreasing in CC Mode
V
Decreasing in CC Mode
Frequency Decreasing Slope of CC Regulation
Sinking Current Threshold for Brownout
Protection
ZCD Comparator Internal Offset Voltage
Output Over-Voltage Protection with V
Voltage
Output Over-Voltage Protection Debounce Time
Internal Reference Voltage for CC Regulation
Variation Test Voltage on CS Pin for CC Output
(Non-Inverting Input of Error Amplifier for CC
Regulation)
Normal Current Limit Threshold Voltage
Second Current Limit Threshold Voltage at Power
Limit Mode (Vs<V
GATE Output Turn-Off Delay
Minimum On Time
Leading-Edge Blanking Time
Slope Compensation
Maximum Duty Cycle
Output Voltage Low
Output Voltage High
Output Voltage High
Rising Time
Falling Time
Gate Output Clamping Voltage
S
S
S
S
Sampling Voltage to Switch to the Second
Sampling Voltage to Switch Back to the
Sampling Voltage to Start Frequency
Sampling Voltage to End Frequency
occurs when the power unit enters CCM operation.
A
=25C unless noted.
(6)
(6)
VS-CM-MAX
Parameter
(6)
(Continued)
)
(6)
(6)
S
Sampling
(6)
6
V
V
V
+2KHz
S
/(V
f=140kHz
V
V
V
(Test Mode)
Maximum Duty Cycle
V
V
V
V
V
V
CS
CS
CS
G-CC
CS
VS
CS
DD
DD
DD
DD
DD
DD
SN-CC
=5V
=5V, f
=5V, f
=0.41V
=0.3V
=5V, V
=25V, I
=8V, I
=5.5V, I
=15V, C
=15V, C
=25V
= (f
Condition
-V
S1
S1
S2
O
SG-CC
-f
VS
=1mA
O
=f
=f
O
S2
L
L
=10mA
=2.5, V
=1mA
=1nF
=1nF
OSC
OSC-CCM
)
)
-2KHz
FB
=5V
2.475 2.500 2.525
2.405 2.430 2.455
Min. Typ. Max. Unit
8.75 10.00 11.25
2.70
0.25
180
100
100
4.0
52
61
30
13
5
0.55
0.75
2.15
0.70
2.80
0.30
200
100
250
150
140
0.7
0.3
64
47
60
64
50
15
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2.85
0.35
120
150
320
200
180
1.5
5.5
76
67
70
17
8
kHz/V
mV
μA
μA
μs
ns
ns
ns
ns
ns
%
V
V
V
V
V
V
V
V
V
V
V
V
V
V