参数资料
型号: FA5332M
元件分类: 稳压器
英文描述: 1.5 A POWER FACTOR CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PDSO16
封装: SOP-16
文件页数: 11/13页
文件大小: 151K
代理商: FA5332M
7
FA5331P(M)/FA5332P(M)
6. ON/OFF control input circuit
Figure 7 shows the ON/OFF control input circuit. If pin 12 is set
to the high level (enable), this IC outputs pulses from the OUT
pin. If pin 12 is set to the low level (disable), the internal bias
power (reference voltage) goes off and the IC current
consumption becomes about 1/10 that of its ON state. The
output level of pin 11 (CS for soft start) also goes low.
7. Output circuit
As Fig. 8 shows, pin 9 is configured as the high power terminal
(VC), independent of the IC power terminal (VCC). This pin
allows an independent drive resistance when the power
MOSFET is ON and OFF. If the drive resistances in the ON and
OFF states are Rg (on) and Rg (off), the following formulas can
be used to determine the total gate resistance
Rg:
Rg (on) = Rg1 + Rg2 ............................................. (9)
Rg (off) = Rg2 ..................................................... (10)
In the standby state, the output level of pin 8 is held low.
If the potential at the drain terminal of the power MOSFET
fluctuates, the gate-drain capacitance may drive the IC output
voltage at pin 8 to below 0. Once the voltage at pin 8 reaches
–0.6V, an unwanted current flows in the IC and a large abnormal
current flows in the output circuit when the output transistor is
turned on. To prevent this, connect a Schottky diode across the
gate and source of the power MOSFET.
Fig. 7 ON/OFF control input circuit
Fig. 8 Output circuit
1k
100k
Vcc
12
ON/OFF
10
A
Rg2
Rg1
GND
VCC
Cv
+
10
9
8
7
Pin7
Schottky
diode
相关PDF资料
PDF描述
FA5332P 1.5 A POWER FACTOR CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PDIP16
FA5501AN 1 A SWITCHING CONTROLLER, PDSO8
FA5501AP 1 A SWITCHING CONTROLLER, PDIP8
FA5500AN 1 A SWITCHING CONTROLLER, PDSO8
FA5500AP 1 A SWITCHING CONTROLLER, PDIP8
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