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參數資料
| 型號： | HT7660 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | CMOS Switched-Capacitor Voltage Converter(CMOS可變電容變壓器) |
| 中文描述： | CMOS開關電容電壓轉換器（的CMOS可變電容變壓器） |
| 文件頁數： | 4/9頁 |
| 文件大小： | 98K |
| 代理商： | HT7660 |
HT7660
4
November 30, 1999
Functional Description
HT7660 needs only two external polarized elec-
trolytic capacitors to complete a negative volt-
age converter.
HT7660 has four MOS power switches: S1, S2,
S3 and S4. For the first half cycle, when S2 and
S4 are open, Capacitor C1 is charged to a volt-
age V
DD
through S1 and S3. During the second
half cycle, when S1 and S3 are open, the charge
on Capacitor C1 is shifted to Capacitor C2
through S2 and S4. Thereby, the voltage across
Capacitor C2 is V
DD
. Because the positive ter-
minal of C2 is connected to V
SS
, we get a V
DD
voltage at V
OUT
pin.
For high voltage operation, the LV pin is left
floating to enable the voltage regulator. This
can reduce the current consumption of the RC
oscillator, and thus get a fixed switching fre-
quency Fosc with high voltage range. For low
voltage operation, the LV pin is connected to
V
SS
to bypass the voltage regulator of which in-
herent voltage drop can degrade the operation
at low voltages.
Acapacitor may be connected between V
DD
and
pin OSC to lower the switching Fosc, and an ex-
ternal clock may be added to replace the
built-in RC oscillator.
The operating mode of HT7660
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PDF描述 |
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| HT7700 | Key & Touch Linear Dimmer |
| HT7700A | Key & Touch Linear Dimmer |
| HT7700B | Key & Touch Linear Dimmer |
| HT7700C | Key & Touch Linear Dimmer |
| HT7700D | Key & Touch Linear Dimmer |
相關代理商/技術參數 |
參數描述 |
|---|---|
| HT7660(8DIP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC-to-DC Voltage Converter |
| HT7660(8SOIC) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC-to-DC Voltage Converter |
| HT7660_03 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:CMOS Switched-Capacitor Voltage Converter |
| HT7700 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Key & Touch Linear Dimmer |
| HT7700A | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Key & Touch Linear Dimmer |
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