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FA3621 Datasheet(PDF) 4 Page - Fuji Electric

Part # FA3621
Description  For Switching Power Supply Control
PDF  8 Pages
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Manufacturer  FUJI [Fuji Electric]
Direct Link  http://www.fujielectric.co.jp/eng/fdt/scd
Logo FUJI - Fuji Electric

FA3621 Datasheet(HTML) 4 Page - Fuji Electric

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FA3621F
4
Oscillator section
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Oscillation frequency
fOSC
RT=18k
Ω, CT=100pF
414
460
506
kHz
Frequency variation due to supply voltage change
fdV
VCC=4.5 to 18V
±1
±3%
Frequency variation due to temperature change
fdT
Ta=–20 to +25
°C
±1.5
%
Ta=+25 to +85
°C
±1.5
Error amplifier section
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Input offset voltage
VIOF
10
mV
Input common mode voltage range
VICOM
0.2
1.7
V
Open-loop gain
AVOL
70
75
dB
Unity-gain bandwidth
fT
1.2
MHz
Output sink current
IFBL
VFB=1.0V
1.5
2.8
mA
Output source current
IFBH
VFB=0V
–0.25
–0.15
mA
PWM control section
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Maximum duty cycle
Dmax
100
%
Soft-start circuit section 1 (CS1, CS2, CS3/4)
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Input threshold voltage
VCSO
Duty cycle=0%
0.78
V
VCS100
Duty cycle=100%
1.38
V
Charge current
ICS
–7.5
–5.1
–2.5
µA
Soft-start circuit section 2 (CS5, CS6)
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Input threshold voltage
VCSO
Duty cycle=0%
0.79
V
VCS100
Duty cycle=100%
1.40
V
Charge current
ICS
0
µA
Regulated voltage section
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Output voltage
VREG
2.40
2.67
2.95
V
s Electrical characteristics (Ta=25
°C, Vcc1=Vcc2=6V, CT=100pF, RT=18kΩ)
Reference voltage section
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Output voltage
VREF
0.985
1.00
1.015
V
Line regulation
VRLIN
VCC=4.5 to 18V
3
10
mV
Output voltage variation due to temperature change
VRTa
Ta=–20 to +85
°C
±0.5
%



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