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參數(shù)資料
| 型號(hào)： | AP2007 |
| 英文描述： | Synchronous PWM Controller |
| 中文描述： | 同步PWM控制器 |
| 文件頁(yè)數(shù)： | 4/7頁(yè) |
| 文件大?。?/td> | 181K |
| 代理商： | AP2007 |
AP2007
Synchronous PWM Controller
Anachip Corp
www.anachip.com.tw
Rev. 1.0 Apr 1, 2005
4/7
Typical Application Circuit
8
7
6
5
1
2
3
4
D1
Option
VCC
SS/SHDN
FB
DRVP
GND
PHASE
DRVN
Q1
Q2
L1
10uH
C8
470u/16V
C9
Vout=3.2V*
+
-
Vin
+
-
C1
R2
1K
R3
3K*
* Vout = 0.8 x (1+R3/R2)
AP2007
C4
330n
C3
330n
R1
12
V
REF
10n
470u/16V
AF9435
C5
AF9410
C2
0.1u
C6
47n
C7
0.1u
1 Option
R2 1K ~ 10K
(4835)
(4412)
Virtual Frequency Control
Virtual
Frequency
Control
combines
the
advantages of constant frequency and constant
off-time control in a single mode of operation. This
allows fix frequency, precision switching voltage
regulator control with fast transient response and
the smallest solution size. Switch duty cycle can be
adjusted from 0% to 100% on a pulse by pulse basis
when responding to transient conditions. Both 0%
and 100% duty cycle operation can be maintained
for extended periods of time in response to load or
line transients. Figure 1 depicts a simplified
operation
of
the
Virtual
Frequency
Control
technique: The VFC oscillator generates a pulse of
a known duration (VFC_Pulse). The regulator loop
responds by returning a complementary feedback
pulse (FB_Pulse). The FB_Pulse duration is a result
of external conditions such as inductor size, the
voltage across the inductor and the duration of the
VFC_Pulse. A VFC control loop is then formed
whereby the duration of the VFC_Pulse is modified
as a result of the FB_Pulse duration. The VFC loop
arrives at a state of equilibrium, where the operating
frequency remains inherently constant.
GATE
CONTROL
LOGIC
VIRTUAL FREQ
OSCILLATOR
+
-
FB Pulse
VFC Pulse
Vref
ERROR
COMP
V
IN
Lout
Cout
Vout
Rfb1
Rfb2
Figure 1: Virtual Frequency Control Loop-
Synchronous single supply application.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AP2007S | 制造商:ANACHIP 制造商全稱:Anachip Corp 功能描述:Synchronous PWM Controller |
| AP2007SA | 制造商:ANACHIP 制造商全稱:Anachip Corp 功能描述:Synchronous PWM Controller |
| AP2007SL-13 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 SW REG CNTL BUCK BI 200K 9.5MA 20V 1.25V RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| AP2007SL-U | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 SW REG CNTL BUCK BI 200K 9.5MA 20V 1.25V RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| AP2008 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PWM Buck Controller |
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