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Fuji Electric

FA3629AV Datasheet Preview

FA3629AV Datasheet

For Switching Power Supply Control

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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 0.3Nch-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




Fuji Electric

FA3629AV Datasheet Preview

FA3629AV Datasheet

For Switching Power Supply Control

No Preview Available !

FA3629AV
s Absolute maximum ratings
s Recommended operating conditions
Item
Symbol
Power supply voltage
VCC
Output voltage at OUT1 pin VOUT1
Output current at OUT1 pin*1 IOUT1
Source peak current of OUT2 IOUT2+
Sink peak current of OUT2 IOUT2-
Source peak current of OUT3 IOUT3+
Sink peak current of OUT3 IOUT3-
Source average current of OUT2 IOUT2+
Sink average current of OUT2 IOUT2-
Source average current of OUT3 IOUT3+
Sink average current of OUT3 IOUT3-
Input voltage to err. amp. VEI
Total power dissipation*2 Pd
Ambient temperature
TOPR
Junction temperature
TJ
Storage temperature
TSTG
Rating
6.5
40
2.8
–400
400
–400
400
–50
50
–50
50
5.0
500
–25 to +95
125
–40 to +125
*1 Output current is limited by the overcurrent protection
*2 Ta < 25°C
Unit
V
V
A
mA
mA
mA
mA
mA
mA
mA
mA
V
mW
°C
°C
°C
Item
Power supply voltage
Output voltage of OUT1
Output current of OUT1
Oscillation frequency
Ambient temperature
Symbol
VCC
VOUT1
IOUT1
fOSC
TOPR
Min.
2.5
0
0
100
–20
Max.
5.8
32
1.8
1000
85
Unit
V
V
A
kHz
°C
s Electrical characteristics (VCC=3.0V, Ta=25°C)
Reference voltage section
Item
Reference voltage
Variation with supply voltage
Variation with temperature
Symbol
VREF
VREF-LINE
VREF-TC1
VREF-TC2
Test condition
VCC=2.5 to 5.8V
Ta=–20 to +25°C
Ta=+25 to +85°C
Min.
0.98
Typ.
1.00
1
0.5
0.5
Max.
1.02
3
1.2
1.2
Unit
V
mV
%
%
Regulated voltage for internal control blocks
Item
Regulated voltage
Variation with supply voltage
Variation with temperature
Source current
Symbol
VREG
VREG-LINE
VREG-TC1
VREG-TC2
IREG
Test condition
CO=0.1µF
VCC=2.5 to 5.8V
Ta=–20 to +25°C
Ta=+25 to +85°C
Min.
2.16
–40
Typ.
2.20
3
0.5
0.7
Max.
2.24
8
1.5
1.5
–15
Unit
V
mV
%
%
mA
Oscillator section
Item
Oscillation frequency
High level voltage
Low level voltage
Variation with supply voltage
Variation with temperature
Symbol
fOSC
VOSCH
VOSCL
fdv
fdT1
fdT2
Test condition
CT=150pF
CT=150pF
CT=150pF
VCC=2.5 to 5.8V
Ta=–20 to +25°C
Ta=+25 to +85°C
Min.
480
Typ.
550
1.38
0.78
1
5
5
Max.
620
2
7
7
Unit
kHz
V
V
%
%
%
2


Part Number FA3629AV
Description For Switching Power Supply Control
Maker Fuji Electric
Total Page 7 Pages
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