FA7703 Datasheet, PDF (8/21 Pages) Fuji Electric – FUJI Power Supply Control IC

FA7703/04
FA7703/7704
(7) Under Voltage Lock-Out Section (VCC terminal)
Item
Symbol
Conditions
ON threshold
VCCON
OFF threshold
VCCOF
Hysteresis Voltage
Variation
with temperature
VCCHY
VCCHY
Ta=-30 to +25°C
Ta=+25to +85°C
MIN.
1.40
0.05
TYP.
2.00
1.85
0.15
+0.3
-0.1
MAX.
2.25
0.35
Units
V
V
V
mV/°C
mV/°C
(8) Soft Start Section (CS terminal)
Item
Symbol
Conditions
Output source current
ICS CS=0V
Threshold Voltage1
VCS0 Duty Cycle=0%
Threshold Voltage2
VCS50 Duty Cycle=50%
MIN.
-2.8
0.550
TYP.
-2.2
0.650
0.880
MAX.
-1.6
0.750
Units
μA
V
V
(9) Short circuit Protection Section (FB terminal, CS terminal)
Item
Symbol
Conditions
Short Detection
Threshold Voltage
VFBTH ^{FB terminal voltage}
Latched Mode
Threshold Voltage
VCSTH ^{CS terminal voltage}
Latched Mode
Reset Voltage
VCSRE ^{CS terminal voltage}
Latched Mode
Hysteresis
VCSHY ^{CS terminal voltage}
CS terminal
Clamped Voltage
VCSCL1 FB terminal voltage<1.35V
VCSCL2 FB terminal voltage>1.65V
(10) Output Stage Section (OUT1,OUT2 terminal,SEL1 terminal)
Item
Symbol
Conditions
High side on resistance RONH VCC=6V,Source Current=-50mA
High side on resistance RONH VCC=2.5V,Source Current=-50mA
Low side on resistance RONL VCC=6V,Sink Current=+50mA
Low side on resistance RONL VCC=2.5V,Sink Current=+50mA
Rise Time
trn 330pF Load to GND terminal
trp 330pF Load to VCC terminal
Fall Time
tfn 330pF Load to GND terminal
tfp 330pF Load to VCC terminal
SEL1 terminal Input
Voltage
VSEL1L
Pch-MOSFET,
PNP transistor driving
VSEL1H
Nch-MOSFET,
NPN transistor driving
MIN. TYP. MAX. Units
1.350 1.500 1.650 V
1.900 2.000 2.100 V
1.830
V
30
170 300 mV
1.200 1.270 1.340 V
2.120 2.200 2.280 V
MIN.
0
VREG-
0.2
TYP.
10
18
5
5
20
20
35
35
MAX.
20
36
10
10
0.2
Units
Ω
Ω
Ω
Ω
ns
ns
ns
ns
V
VREG
V
(11) Overall Section (VCC terminal)
Item
Symbol
Conditions
Operating mode
Supply Current
Duty Cycle=0%,OUT1/2:open
ICC0 CS=0V, FB1,FB2≈VREG
RT=22kΩ,f≈190kHz
ICC1
Duty Cycle=80%,OUT1/2:open
RT=22kΩ,f≈190kHz
Latched mode
Supply Current
ICC2
ICCLAT
Duty Cycle=80%,OUT1/2:open
RT=3kΩ,f≈1MHz
CS>2.1V,FB1,FB2≈VREG,
RT=22kΩ,f≈190kHz
MIN.
TYP. MAX. Units
1.3
1.9
mA
1.8
2.7
mA
3.1
4.7
mA
1.3
1.9
mA
Fuji Electric Systems Co., Ltd.
AN-057E Rev.1.0
Jun-2010
8
http://www.fujielectric.co.jp/fdt/scd/