- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382953 > FA5510P (Electronic Theatre Controls, Inc.) CMOS IC For Switching Power Supply Control PDF資料下載
參數(shù)資料
| 型號： | FA5510P |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | CMOS IC For Switching Power Supply Control |
| 中文描述： | CMOS集成電路開關(guān)電源控制 |
| 文件頁數(shù)： | 11/22頁 |
| 文件大?。?/td> | 259K |
| 代理商： | FA5510P |
FA551X
11
3.2 Overload shutdown function
Figure 9 shows the overload shutdown circuit, and Figure 10 is
a timing chart that illustrates overload shutdown operation.
If the output voltage drops due to an overload or short circuit,
the FB pin output voltage rises. If the FB pin voltage exceeds
the reference voltage (3.5V) of comparator C3, the output of
comparator C3 goes low to turn off the switch. With the switch
off, the CS pin voltage clamped at 4.0V by zener diode in
normal operation is unclamped, and the constant current
source (5.2μA) begins to charge capacitor Cs again and the CS
pin voltage rises. When the CS pin voltage exceeds the
reference voltage (8.5V) of comparator C2, the output of
comparator C2 toggles to turn off the 5V REF circuit. The IC
then enters the latched mode and shuts down the output. IC
current consumption for shutdown is 45μA (typ) (Vcc=10V).
This current must be supplied through the startup resistor. The
IC enters output off (low voltage) state.
The overload shutdown operation can be reset by lowering the
supply voltage Vcc to below the OFF threshold voltage (9.0V)
or forcing the CS pin voltage below 7.9V.
The period t
OL
from the time the output is short-circuited to the
time the output circuit goes off is given by the following
equation:
When you want to disable the overload shutdown function, see
item 9 in “Design advice”
3.3 Output ON/OFF control function
The IC can be turned on or off via an external signal applied to
the CS pin. Figure 11 shows the output on/off control circuit,
and Figure 12 is a timing chart. The IC is turned off when the
CS pin voltage is externally made to drop below 0.68V (typ).
The output of comparator C1 goes high to turn the 5V REF
circuit off. This shuts the output down. The IC enters output off
(low voltage) state. Required IC current consumption during
shutdown is 80μA (typ) (Vcc=17V). This current must be
supplied through the startup resistor. The IC goes on when the
CS pin is opened and the CS pin voltage exceeds 0.80V (typ).
This turns the 5V REF circuit on and results in automatic soft
start. The power supply then restarts operation.
Fig. 9 Overload shutdown circuit
PWM
Output
circuit
UVLO
REF
RT
CS
FB
VCC
6
OSC
5V VCC
ENB
5V REF
4V
0.8/0.68V
8.5/7.9V
5.2
μ
A
DMAX
Cs
C3
3.5V
8
1
2
7
C1
C2
Comparator C2
reference voltage
(8.5V)
CS pin voltage
DT voltage
FB pin voltage
Oscillator output
OUT pin voltage
REF pin voltage
(4V)
(9.5V)
H
L
ON
OFF
Overload detection
Overload shutdown
(0V)
Fig. 10 Overload shutdown timing chart
Fig. 11 External output ON/OFF control circuit
Fig. 12 Output ON/OFF control circuit timing chart
PWM
Output
circuit
UVLO
REF
RT
CS
FB
VCC
6
OSC
5V
VCC
ENB
5V REF
0.8/0.68V
8.5/7.9V
5.2
μ
A
DMAX
Cs
8
1
2
7
C1
C2
ON/OFF control
CS pin voltage
DT voltage
FB pin voltage
Oscillator output
Comparator C1
reference voltage
(0.8/0.68V)
OUT pin output
REF pin voltage
(4V)
H
L
ON
OFF
ON mode
OFF mode
.....................................................(4)
Cs: Soft start capacitor [μF]
t
OL
[ms] 870 C
S
[ms]
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FA5511N | CMOS IC For Switching Power Supply Control |
| FA5511P | CMOS IC For Switching Power Supply Control |
| FA5514N | CMOS IC For Switching Power Supply Control |
| FA5514P | CMOS IC For Switching Power Supply Control |
| FA5515N | CMOS IC For Switching Power Supply Control |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FA5510P-D1 | 制造商:Fuji Electric 功能描述:Bulk |
| FA551-10PAK | 制造商:Black Box Corporation 功能描述:DB15 Transceiver Connector Kit, Female, 10-Pack |
| FA5511N | 制造商:FUJI 制造商全稱:Fuji Electric 功能描述:PUJI Power Supply Controllc |
| FA5511P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CMOS IC For Switching Power Supply Control |
| FA5511P-D1 | 制造商:Fuji Electric 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。