Bipolar IC
For Switching Power Supply Control
FA531X series
FA531X series
FA5310BP(S), FA5314P(S), FA5316P(S)
FA5311BP(S), FA5315P(S), FA5317P(S)
■ Dimensions, mm
Á SOP-8
5
8
■ 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
1
4
components are needed.
6.05
■ 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)
0.6
0.4±0.1 1.27±0.2
• Output ON/OFF control function by external signal
• Overvoltage cutoff function in latch mode
• Undervoltage malfunction prevention function
• Low standby current (90µA typical)
Á DIP-8
8
5
• Exclusive choices by circuits (See selection guide on page 25)
• 8-pin package (DIP/SOP)
4
1
■ Applications
• Switching power supply for general equipment
9.3
1.5
7.6
2.54±0.25 0.5±0.1
■ Block diagram
Á FA5310BP(S)/FA5311BP(S)/FA5316P(S)/FA5317P(S)
Pin Pin
No. symbol
Description
1
2
3
4
5
6
7
8
RT
Oscillator timing resistor
Feedback
FB
IS (+)
GND
OUT
VCC
CT
Overcurrent (+) detection
Ground
Output
Power supply
Oscillator timing capacitor
Soft-start and ON/OFF control
CS
Á FA5314P(S)/FA5315P(S)
Pin Pin
Description
No. symbol
1
2
3
4
5
6
7
8
RT
Oscillator timing resistor
Feedback
FB
IS (–)
GND
OUT
VCC
CT
Overcurrent (–) detection
Ground
Output
Power supply
Oscillator timing capacitor
Soft-start and ON/OFF control
CS
25