电压反转IC HT4863/HT7660

                                             DC／DC电容电压反转器--HT7660
简单介绍 
HT7660是一款DC／DC电容电压反转器*集成电路。 HT7660的功能是完成电压转换。 HT7660需要的*外部元件是两个*电解电容器。 HT7660包括一个电压调节器，一个RC振荡器和四个输出功率MOS开关。HT7660通过在VDD and the OSC管脚之间增加一个电容器，可以降低RC振荡器的频率，或者可以在OSC引脚上连接一个外部时钟，以取代原来的振荡器。

 
HT7660 的详细介绍 
 
HT7660 -- CMOS Switched-Capacitor VoltageConverter

General Description

HT7660 is a monolithic CMOSswitched-capacitor voltage converter. HT7660 is designed tocomplete a voltage conversion from positive to negative. The onlyrequired external components are two low cost electrolyticcapacitors.

HT7660 includes a voltage regulator, an RCoscillator and four output power MOS switches. The frequency of anRC oscillator can be lowered by adding an external capacitorbetween VDD and the OSC pin, or an external clock can beconnected to the OSC pin to replace the original oscillator. The LVterminal may be tied to VSS to disable the voltage regulator. Bydoing this, low voltage operation can be improved. HT7660 Features

HT7660 Simple conversion of VDD to -VDD
HT7660 Cascade connection (two devices are connected,VOUT= -2VDD)
HT7660 Boost pin for higher switching frequency
HT7660 Easy to use
- Requires only two external capacitors
HT7660 No external diode required
HT7660 T*ically with no load voltage conversion, 99.9% efficiency
HT7660 T*ical power efficiency is 98%
HT7660 Wide operating voltage range: 3V to 12V
HT7660 8-pin DIP/SOP package