
FA531X series
FA531X series
1
FA5310BP(S), FA5314P(S), FA5316P(S)
FA5311BP(S), FA5315P(S), FA5317P(S)
I
Description
The FA531X series are bipolar ICs for switching power supply
control that can drive a power MOSFET.
These ICs contain many functions in a small 8-pin package.
With these ICs, a high-performance and compact power
supply can be created because not many external discrete
components are needed.
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Features
Drive circuit for connecting a power MOSFET
Wide operating frequency range (5 to 600kHz)
Pulse-by-pulse overcurrent limiting function
Overload cutoff function (Latch or non-protection mode
selectable)
Output ON/OFF control function by external signal
Overvoltage cutoff function in latch mode
Undervoltage malfunction prevention function
Low standby current (90
μ
A typical)
Exclusive choices by circuits (See selection guide on page 25)
8-pin package (DIP/SOP)
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Applications
Switching power supply for general equipment
Bipolar IC
For Switching Power Supply Control
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Dimensions, mm
á
SOP-8
8
6.05
5
8
±
0
0.4
±
0.1
1.27
±
0.2
0.6
0
+
0
°
1
4
5
2
á
DIP-8
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Block diagram
á
FA5310BP(S)/FA5311BP(S)/FA5316P(S)/FA5317P(S)
á
FA5314P(S)/FA5315P(S)
1
8
5
4
9.3
6
7.6
3
4
1.5
3
0~15
0~15
0.5
±
0.1
2.54
±
0.25
0.3
+0.1
Pin
No.
Pin
symbol
RT
FB
IS (+)
GND
OUT
VCC
CT
CS
Description
1
Oscillator timing resistor
2
Feedback
3
Overcurrent (+) detection
4
Ground
5
Output
6
Power supply
7
Oscillator timing capacitor
8
Soft-start and ON/OFF control
Pin
No.
Pin
symbol
RT
FB
IS (–)
GND
OUT
VCC
CT
CS
Description
1
Oscillator timing resistor
Feedback
3
Overcurrent (–) detection
4
Ground
5
Output
6
Power supply
7
Oscillator timing capacitor
8
Soft-start and ON/OFF control