FA7700V Datasheet, PDF (3/13 Pages) List of Unclassifed Manufacturers – For Switching Power Supply Control

FA7700V, FA7701V
s Electrical characteristics (Ta=25˚C, VCC=6V, RT=22kΩ)
Internal bias section (REF terminal voltage)
Item
Output voltage
Line regulation
Load regulation
Variation with temperature
Symbol
VREF
VLINE
VLOAD
VTC1
VTC2
Test condition
REF terminal source current
IREF=0mA
Vcc=2.5 to 20V, IREF=0mA
IREF=0 to 2mA
Ta=–30 to 25°C
Ta=25 to 85°C
Min.
2.16
Typ.
2.23
±2
±2
±0.3
±0.3
Max. Unit
2.30 V
±14
mV
±12
mV
%
%
Oscillator section (Frequency set by RT terminal)
Item
Oscillation frequency
Line regulation
Variation with temperature
Symbol
fosc
fLINE
fTC1
fTC2
Test condition
Min.
RT=22kΩ
155
Vcc=2.5 to 20V
Ta=–30 to 25°C, 50k to 1MHz
Ta=25 to 85°C, 50k to 1MHz
Typ.
185
±0.1
±2
±3
Max. Unit
215 kHz
%
%
%
Error amplifier section (IN- terminal, FB terminal)
Item
Reference voltage
Symbol
VB
Input current
VB line regulation
VB variation with temperature
Open loop gain
Unity gain bandwidth
Output current Source
Sink
IIN–
VBLINE
VBTC1
VBTC2
AVO
fT
IOHE
IOLE
Test condition
IN- terminal, FB terminal:
Shorted (voltage follower)
Vcc=2.5 to 20V
Ta=–30 to 25°C
Ta=25 to 85°C
FB terminal=VREF– 0.5V
FB terminal=0.5V
Min. Typ. Max. Unit
0.863 0.880 0.897 V
-500
70
–220
3
±1
±0.3
±0.3
1.5
–160
6
+500
±5
–100
12
nA
mV
%
%
dB
MHz
µA
mA
Pulse width modulation (PWM) section (FB terminal voltage and duty cycle)
Item
FB 0% threshold
FB 50% threshold
Maximum duty cycle
FA7700
FA7701
Symbol
VFB0
VFB50
DMAX1
DMAX2
DMAX3
DMAX
Test condition
Duty cycle = 0%
Duty cycle = 50%
RT=100kΩ, f=50kHz
RT=22kΩ, fԼ185kHz
RT=3kΩ, fԼ1MHz
Min. Typ. Max. Unit
0.560 0.660 0.760 V
0.880
V
85
90
95
%
83
88
93
%
80
86
92
%
100
%
Undervoltage lock-out section (VCC terminal voltage)
Item
ON threshold
OFF threshold
Hysteresis voltage
Variation with temperature
Symbol
VCCON
VCCOF
VCCHY
VCCHY
Test condition
Ta= –30 to 25°C
Ta= 25 to 85°C
Min.
1.60
0.04
Typ.
2.07
1.93
0.14
+0.2
–0.2
Max.
2.30
0.24
Unit
V
V
V
mV/°C
mV/°C
3