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FA5547 Datasheet(PDF) 7 Page - Fuji Electric

Part # FA5547
Description  Switching Power Supply Control IC
Download  27 Pages
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Manufacturer  FUJI [Fuji Electric]
Direct Link  http://www.fujielectric.co.jp/eng/fdt/scd
Logo FUJI - Fuji Electric

FA5547 Datasheet(HTML) 7 Page - Fuji Electric

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AN-027E Rev.0.4
April -2011
7
Fuji Electric Co., Ltd.
http://www.fujielectric.co.jp/products/semiconductor/
FA5546/47
(2) Recommended operating condition
Item
Symbol
MIN
TYP
MAX
Unit
VCC Power supply voltage
VCC
11
18
22
V
Direct voltage
VVH(DC)
100
450
V(DC)
High input voltage
Half-wave
rectification
VVH(AC1)
80
288
V(AC)
Full-wave
rectification
VVH(AC2)
80
288
V(AC)
VH pin Resistance
RVH
2
---
10
k ohm
LAT pin capacity
CLAT
0.22
1.0
2.2
uF
VCC pin capacity
CVCC
10
33
100
uF
Operating ambient temperature
Ta
-30
85
(3) Electric characteristics (in case nothing specified : Tj=25℃, VCC=18V)
Switching oscillator section (FB pin)
Item
Symbol
Conditions
MIN
TYP
MAX
Unit
Oscillation frequency
Fosc
VFB=3V
54
60
66
kHz
Voltage stability
Fdv
VCC:11V to 24V
-2
+2
%
Temperature stability *1
Fdt
Tj= -30 to 125℃
-5
+5
%
FB pin threshold voltage
for light load mode
Vfbm
0.95
1.15
1.35
V
Oscillation frequency
reduction ratio
kf
Δf/ΔVfb
200
240
280
kHz/V
Minimum oscillation
frequency
Fmin
0.22
0.34
0.50
kHz
External latch shutdown signal (LAT pin)
Item
Symbol
Conditions
MIN
TYP
MAX
Unit
Source current of LAT pin
Ilat
LAT=1.1V
Charge period
-80
-70
-60
uA
Latch-off level
VthLAT
1.00
1.05
1.10
V
Latch-off delay timer *1
TdLAT
50
65
80
us
Pulse width modulation section (FB pin)
Item
Symbol
Conditions
MIN
TYP
MAX
Unit
Maximum duty cycle
Dmax
FB=4.5V
75
80
85
%
Minimum duty cycle
Dmin
FB=0V
0
%
Input threshold voltage
VthFB0
DUTY=0%
340
400
460
mV
FB pin source current
Ifb0
VFB=0V
-300
-250
-200
uA


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