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参数资料
| 型号： | FA5305AS |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | SOP-8 |
| 文件页数： | 4/17页 |
| 文件大小： | 280K |
| 代理商： | FA5305AS |
FA5304AP(S)/FA5305AP(S)
12
2. Disabling overload shutdown function
As shown in Figure 24, connect a 330k
to 470k resistor
between the CS pin and ground. Then, the CS pin voltage
does not rise high enough to reach the reference voltage
(7.0V) of the latch comparator, and the IC does not enter the
OFF latch mode. With this connection, the overvoltage
shutdown function is not available.
3. Setting soft start period and OFF latch delay
independently
Figure 25 shows a circuit for setting the soft start period and
OFF latch delay independently. In this circuit, capacitance CS
determines the soft start period, and capacitance CL
determines the OFF latch delay. If the overload shutdown and
overvoltage shutdown functions raise the CS pin voltage to
around 5V, zener diode Zn becomes conductive to charge CL.
The OFF latch delay can be thus prolonged by CL.
4. Laying out Vcc and ground lines
Figure 26 and Figure 27 show the recommended layouts of
VCC and ground lines. The bold lines represent paths carrying
large currents. The lines must have an adequate thickness.
5. Sink current setting for CS terminal
A sink current to CS terminal must be satisfied the following
condition to prevent from the malfunction which uncontrolled
pulse output generates at OUT terminal when latch-mode
protection should be operated for overvoltage.
150
A < Ics(sink) < 500A at Vcs= 6.5(V)
Ics(sink): Sink current to CS terminal
Example (for the circuit shown in Fig. 28 )
Ics(sink) = (28(V)–18(V)– 6.5(V))/7.5(k
)
467 (
A) < 500 (A)
Fig. 25 Independent setting of soft-start period and OFF latch
delay
Fig. 26 Vcc line and ground line for FA5304A
CS
VCC
7.5k
18V Zener diode
Under 500
A
Fig. 24 Disabling overload shutdown function
Fig. 27 Vcc line and ground line for FA5305A
Fig. 28 Setting sink current for CS terminal
相关PDF资料 |
PDF描述 |
|---|---|
| FA5304AS | 1.5 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| FA5305AP | 1.5 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDIP8 |
| FA5304AP | 1.5 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDIP8 |
| FA5314S | 1.5 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| FA5310BP | 1.5 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDIP8 |
相关代理商/技术参数 |
参数描述 |
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| FA531 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:FA531硅NPN型超高频大功率晶体管 |
| FA5310 | 制造商:FUJI 制造商全称:Fuji Electric 功能描述:Bipolar IC For Switching Power Supply Control |
| FA5310BP | 制造商:FUJI 制造商全称:Fuji Electric 功能描述:Bipolar IC For Switching Power Supply Control |
| FA5310BP(S) | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| FA5310BPS | 制造商:FUJI 制造商全称:Fuji Electric 功能描述:Bipolar IC For Switching Power Supply Control |
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