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PDF ( 数据手册 , 数据表 ) FA5310

零件编号 FA5310
描述 Bipolar IC For Switching Power Supply Control
制造商 Fuji Electric
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FA5310 数据手册, 描述, 功能
FA531XFA531X series series
FA5310BP(S), FA5314P(S), FA5316P(S)
FA5311BP(S), FA5315P(S), FA5317P(S)
s 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.
s 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 (90µA typical)
• Exclusive choices by circuits (See selection guide on page 25)
• 8-pin package (DIP/SOP)
s Applications
• Switching power supply for general equipment
Bipolar IC
For Switching Power Supply Control
s Dimensions, mm
SOP-8
8
5
14
6.05
0.4±0.1 1.27±0.2
DIP-8
8
5
0.6
1 9.3 4
1.5
s Block diagram
FA5310BP(S)/FA5311BP(S)/FA5316P(S)/FA5317P(S)
2.54±0.25 0.5±0.1
0~15˚
7.6
0.3 +–00.1.05
0~15˚
Pin Pin
No. symbol
1 RT
2 FB
3 IS (+)
4 GND
5 OUT
6 VCC
7 CT
8 CS
Description
Oscillator timing resistor
Feedback
Overcurrent (+) detection
Ground
Output
Power supply
Oscillator timing capacitor
Soft-start and ON/OFF control
FA5314P(S)/FA5315P(S)
Pin Pin
No. symbol
1 RT
2 FB
3 IS (–)
4 GND
5 OUT
6 VCC
7 CT
8 CS
Description
Oscillator timing resistor
Feedback
Overcurrent (–) detection
Ground
Output
Power supply
Oscillator timing capacitor
Soft-start and ON/OFF control
1







FA5310 pdf, 数据表
The detection threshold is -0.17V for FA5314/15 with respect to
ground as shown in Figure 17.
The operation is similar to that of FA5310B/11B/16/17 except
the threshold is minus voltage compared to that which is plus
voltage for FA5310B/11B/16/17.
Figure 18 is a timing chart which illustrates current limiting
operations.
6. Undervoltage lockout circuit
The IC incorporates a circuit which prevents the IC from
malfunctioning when the supply voltage drops. When the
supply voltage is raised from 0V, the IC starts operation with
VCC=VCC ON.
If the supply voltage drops, the IC shuts its output down when
VCC=VCC OFF. When the undervoltage lockout circuit operates,
the CS pin goes low to reset the IC.
7. Output circuit
As shown in Figure 19, the IC's totem-pole output can directly
drive the MOSFET. The OUT pin can source and sink currents
of up to 1.5A or 1.0A.
If IC operation stops when the undervoltage lockout circuit
operates, the gate voltage of the MOSFET goes low and the
MOSFET is shut down.
FA531X series
Fig. 17 Overcurrent limiting circuit for FA5314/15
CS pin voltage (3.6V)
DT voltage
Oscillator output
FB pin voltage
OUT pin output H
L
Minus
detection
IS ( – ) pin voltage
Comparator C4
Reference
voltage (– 0.17V)
Bias voltage
OFF
Overcurrent limiting
Fig. 18 Overcurrent timing chart for FA5314/15
Fig. 19 Output circuit
8







FA5310 equivalent, schematic
Example of FA5314 application circuit
FA531X series
Example of FA5315 application circuit
16










页数 17 页
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零件编号描述制造商
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FA5310BPBipolar IC For Switching Power Supply ControlFuji Electric
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