參數(shù)資料
型號： FA7700V
廠商： Electronic Theatre Controls, Inc.
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： For Switching Power Supply Control
中文描述： 對于開關(guān)電源控制
文件頁數(shù)： 3/13頁
文件大?。?/td> 182K
代理商： FA7700V
FA7700V, FA7701V
3
Pulse width modulation (PWM) section (FB terminal voltage and duty cycle)
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
FB 0% threshold
V
FB0
Duty cycle = 0%
0.560
0.660
0.760
V
FB 50% threshold
V
FB50
Duty cycle = 50%
R
T
=100k
, f=50kHz
R
T
=22k
, f 185kHz
R
T
=3k
, f 1MHz
0.880
V
Maximum duty cycle
FA7700
D
MAX1
85
90
95
%
D
MAX2
83
88
93
%
D
MAX3
80
86
92
%
FA7701
D
MAX
100
%
Error amplifier section (IN- terminal, FB terminal)
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Reference voltage
V
B
IN- terminal, FB terminal:
Shorted (voltage follower)
0.863
0.880
0.897
V
Input current
I
IN
–
-500
+500
±
5
nA
V
B
line regulation
V
BLINE
Vcc=2.5 to 20V
Ta=
–
30 to 25
°
C
Ta=25 to 85
°
C
±
1
±
0.3
±
0.3
mV
V
B
variation with temperature
V
BTC1
%
V
BTC2
%
Open loop gain
A
VO
70
dB
Unity gain bandwidth
f
T
1.5
MHz
μ
A
mA
Output current
Source
I
OHE
FB terminal=V
REF
–
0.5V
–
220
–
160
–
100
Sink
I
OLE
FB terminal=0.5V
3
6
12
Oscillator section (Frequency set by R
T
terminal)
Item
Symbol
Test condition
R
T
=22k
Vcc=2.5 to 20V
Ta=
–
30 to 25
°
C, 50k to 1MHz
Ta=25 to 85
°
C, 50k to 1MHz
Min.
Typ.
Max.
Unit
Oscillation frequency
f
osc
155
185
±
0.1
±
2
±
3
215
kHz
Line regulation
f
LINE
%
Variation with temperature
f
TC1
%
f
TC2
%
I
Electrical characteristics
(Ta=25
C, V
CC
=6V, R
T
=22k
)
Internal bias section (REF terminal voltage)
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Output voltage
V
REF
REF terminal source current
I
REF
=0mA
2.16
2.23
2.30
V
Line regulation
V
LINE
Vcc=2.5 to 20V, I
REF
=0mA
±
2
±
2
±
0.3
±
0.3
±
14
±
12
mV
Load regulation
V
LOAD
I
REF
=0 to 2mA
Ta=
–
30 to 25
°
C
Ta=25 to 85
°
C
mV
Variation with temperature
V
TC1
%
V
TC2
%
Undervoltage lock-out section (V
CC
terminal voltage)
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
ON threshold
V
CCON
2.07
2.30
V
OFF threshold
V
CCOF
1.60
1.93
V
Hysteresis voltage
V
CCHY
0.04
0.14
0.24
V
mV/
°
C
mV/
°
C
Variation with temperature
V
CCHY
Ta=
–
30 to 25
°
C
Ta= 25 to 85
°
C
+0.2
–
0.2
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