FA3629AV Datasheet, PDF (1/7 Pages) Fuji Electric – For Switching Power Supply Control

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
1
8
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