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FA7701V Datasheet(PDF) 7 Page - Fuji Electric

Part # FA7701V
Description  FUJI Power Supply Control IC
PDF  19 Pages
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Manufacturer  FUJI [Fuji Electric]
Direct Link  http://www.fujielectric.co.jp/eng/fdt/scd
Logo FUJI - Fuji Electric

FA7701V Datasheet(HTML) 7 Page - Fuji Electric

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7
Quality is our message
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(3) Electrical characteristics
(Unless otherwise standard, Ta=25
℃,Vcc=6V,RT=22kΩ)
(1)Internal Bias Section (REF terminal voltage)
Item
Symbol
Conditions
MIN.
TYP.
MAX.
Units
Output Voltage
VREF
REF terminal source current
IREF = 0mA
2.16
2.23
2.30
V
Line Regulation
VLINE
Vcc = 2.5 to 20V，IREF = 0mA
±2
±14
mV
Load Regulation
VLOAD
IREF = 0 to 2mA
±2
±12
mV
VTC1
Ta = -30 to 25
℃±0.3
%
Variation
with temperature
VTC2
Ta = 25 to 85
℃±0.3
%
(2)Oscillator Section (Frequency set by RT terminal )
Item
Symbol
Conditions
MIN.
TYP.
MAX.
Units
Oscillation
frequency
fosc
RT = 22k
Ω
155
185
215
kHz
Line Regulation
fLINE
Vcc = 2.5 to 20V
±0.1
%
fTC1
Ta = -30 to 25
℃, 50k to 1MHz
±2
%
Variation
with temperature
fTC2
Ta = 25 to 85
℃, 50k to 1MHz
±3
%
(3)Error Amplifier Section (IN- terminal , FB terminal
）
Item
Symbol
Conditions
MIN.
TYP.
MAX.
Units
Reference Voltage
VB
IN- terminal, FB terminal
:shorted (Voltage Follower)
0.863
0.880
0.897
Ｖ
Input current
IIN-
-500
+500
nA
“VB”
Line Regulation
VBLINE
Vcc = 2.5 to 20V
±1
±5
mV
VBTC1
Ta = -30 to 25
℃±0.3
%
“VB” variation
with temperature
VBTC2
Ta = 25 to 85
℃±0.3
%
Open Loop Gain
AVO
70
dB
Unity Gain
Bandwidth
fT
1.5
MHz
Source
IOHE
FB terminal = VREF- 0.5V
-220
-160
-100
μA
Output
Current
Sink
IOLE
FB terminal = 0.5V
3
6
12
mA
(4)Pulse Width Modulation (PWM) Section (FB terminal voltage and Duty Cycle)
Item
Symbol
Conditions
MIN.
TYP.
MAX.
Units
FB 0% threshold
VFB0
Duty Cycle = 0%
0.560
0.660
0.760
Ｖ
FB 50% threshold
VFB50
Duty Cycle = 50%
0.880
Ｖ
DMAX1
RT = 100k
Ω,ｆ≒ 50kHz
85
90
95
%
DMAX2
RT = 22k
Ω,ｆ≒185kHz
83
88
93
%
FA7700
DMAX3
RT = 3k
Ω,ｆ≒1MHz
80
86
92
%
Maximum
Duty
Cycle
FA7701
DMAX
100
%
(5)Under Voltage Lock-Out Section (VCC terminal voltage)
Item
Symbol
Conditions
MIN.
TYP.
MAX.
Units
ON threshold
VCCON
2.07
2.30
Ｖ
OFF threshold
VCCOF
1.60
1.93
Ｖ
Hysteresis Voltage
VCCHY
0.04
0.14
0.24
Ｖ
Ta = -30 to 25
℃＋0.2
mV/
℃
Variation with
temperature
VCCHY
Ta = 25 to 85
℃−0.2
mV/
℃



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