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参数资料
| 型号： | APW7066RC-TRL |
| 厂商： | ANPEC ELECTRONICS CORP |
| 元件分类： | 稳压器 |
| 英文描述： | Dual Synchronous Buck PWM Controllers and One Linear Controller |
| 中文描述： | SWITCHING CONTROLLER, PDSO24 |
| 封装： | LEAD FREE, MO-153ADT, TSSOP-24 |
| 文件页数： | 15/33页 |
| 文件大小： | 338K |
| 代理商： | APW7066RC-TRL |
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Copyright
ANPEC Electronics Corp.
Rev. A.7 - Mar., 2008
APW7066
22
0
100
200
300
400
500
600
700
800
900
1000
0
100
200 300 400 500
600 700 800
Switching Frequency (kHz)
FS to GND
FS to VCC12
F
S
R
e
s
is
ta
n
c
e
(k
Ω
)
Function Description (Cont.)
VCC (5.8V)
VCC12
OPTIONAL R
FOR SHUNT
REGULATOR
Figure 5. FS/SYNC Resistance vs. Frequency
Shunt Regulator (Cont.)
ISHUNT = ICC + ISHUNT(MIN)
Where:
ISHUNT = Required Shunt Regulator Current
ICC = Supply Current
ISHUNT(MIN) = Minimum Shunt Regulator Current
Oscillator
The APW7066 provides the oscillator switching
frequency adjustment. Connect a resistor from
FS/SYNC pin to the ground, the nominally 300kHz
oscillator switching frequency is increased according
to the value of the resistor. The adjustment range of
the switching frequency is 300kHz to 800kHz.
Conversely, connecting a resistor from FS/SYNC pin
to the VCC12 reduces the switching frequency.The
adjustment range of the switching frequency is 70kHz
to 300kHz.
SYNC
The switching frequency also can be synchronized to
an external frequency. If there are two switching
converters on the same board, taking the LGATE
signal from another switching converter, go through a
10k
resistor, and connecting to the FS/SYNC pin
(see Figure 6). Figure 7 shows the switching timing of
the synchronization function. The rising edge of
external signal and the falling edge of UGATE of
APW7066 are fixed; there is a delay time between
the rising edge of external signal and the falling
edge of UGATE, the delay time is about 500ns. Figure
8 shows the timing chart of the synchronization
function.An external signal is connected to the FS/SYNC
pin and the switching frequency of APW7066 will track
the frequency of external signal after an additional
300us delay time to avoid false triggering. If another
converter
’s signal is lost, the APW7066 will return to
internal oscillator. This allows the two switching
converters operating at the same frequency to avoid the
interference from the independent frequencies between
them. The acceptable frequency is a range of 150kHz
to 800kHz.
Figure 6. Connecting the LGATE signal from
other regulator to FS/SYNC pin
APW7066
FS/
SYNC
Other
Regulator
UGATE
LGATE
VIN
VOUT
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相关代理商/技术参数 |
参数描述 |
|---|---|
| APW7066RC-TU | 制造商:ANPEC 制造商全称:Anpec Electronics Coropration 功能描述:Dual Synchronous Buck PWM Controllers and One Linear Controller |
| APW7066RC-TUL | 制造商:ANPEC 制造商全称:Anpec Electronics Coropration 功能描述:Dual Synchronous Buck PWM Controllers and One Linear Controller |
| APW7067N | 制造商:ANPEC 制造商全称:Anpec Electronics Coropration 功能描述:Synchronous Buck PWM and Linear Controller |
| APW7067N_08 | 制造商:ANPEC 制造商全称:Anpec Electronics Coropration 功能描述:Synchronous Buck PWM and Linear Controller |
| APW7067NKE-TR | 制造商:ANPEC 制造商全称:Anpec Electronics Coropration 功能描述:Synchronous Buck PWM and Linear Controller |
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