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PDF FA3629AV Data sheet ( Hoja de datos )
| Número de pieza | FA3629AV | |
| Descripción | For Switching Power Supply Control | |
| Fabricantes | Fuji Electric | |
| Logotipo |  |
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FA3629AV
s Description
FA3629AV is a Power IC which includes DC-DC
converter controller and Nch-power MOSFET.
This IC can directly drive Nch/Pch MOSFET.
This IC is suitable to reduce converter size because it has
many functions in a small package TSSOP.
s Features
• Low input voltage: 2.5V to 6.5V
• 40V CDMOS Process:
Built-in 0.3Ω Nch-Power MOSFET(ch1, open drain)
• 3-channels PWM Control:
2 boost circuits(ch1, ch2), 1 inverting circuit (ch3)
• Adjustable soft start time and maximum duty cycle
• Built-in timer latch for short circuit protection:
Delay time = 216 / (switching frequency)
• Built-in protection functions: Overcurrent limit for MOSFET,
overheat protection, undervoltage lockout
• Wide range of operation frequency: 100kHz to 1MHz
• Package: TSSOP-16(Thin and small)
s Applications
• Power supply for general equipment
CMOS IC
For Switching Power SuppFlyA3C6o2n9tAroVl
s Dimensions, mm
TSSOP-16
16 9
18
5.2
0.2±0.05
0.65
0.5±0.08
s Block diagram
Pin Pin
No. symbol
1 FB1
2 IN1–
3 IN2–
4 GND
5 PGND
6 FB2
7 IN3–
8 FB3
9 OUT3
10 OUT2
11 VCC
12 OUT1
13 REG
14 CT
15 CS3
16 CS
Description
Ch.1 output of error amplifier
Ch.1 inverting input to error
amplifier
Ch. 2 inverting input to error
amplifier
Ground of control blocks
Ground of large power blocks
Ch. 2 output of error amplifier
Ch. 3 inverting input to error
amplifier
Ch. 3 output of error amplifier
Ch. 3 output (for Pch-MOSFET)
Ch. 2 output (for Nch-MOSFET)
Power supply
Ch.1 drain output of internal
Nch-MOSFET
Regulated voltage output
Oscillator timing capacitor
Soft start for Ch. 3
Soft start for Ch.1 and Ch. 2
1
1 page  
s Characteristic curves (Ta=25°C)
Supply current (ICC) vs oscillation frequency (fOSC)
FA3629AV
Oscillation frequency (fOSC) vs. timing capactior(CT)
VCC=6.0V
6
VCC=5.0V
4
VCC=3.0V
VCC=2.5V
2
0
200k
500k
fosc [kHZ]
800k
Oscillation frequency (fOSC) vs. ambient temperature (Ta)
700
650
600
550
500
450
400
25
0
25 50
Ta [°C]
75 100
Oscillation peak voltage vs. timing capactior(CT)
2
Maximum peak voltage
1
Minimum peak voltage
0
100 500 1000
CT [pF]
1000
100
100
CT [pF]
1000
Max. on duty cycle vs. oscillation frequency (fOSC)
100
90
CH.1, 2
80
CH. 3
70
100
500 1000
fosc [kHz]
Error amplifier voltage gain (Av) /phase vs.
frequency (f)
Condition: Open loop
100
90
80
70
60
50
40
30
20
10
0
– 10
– 20
– 30
100
Phase
Av
1K 10K 100K 1M
f [HZ]
180
150
120
90
60
30
0
– 30
– 60
10M
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet FA3629AV.PDF ] | |
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