May I ask what is the function of the 7660S chip? Thank you.

EEW2018

May I ask what is the function of the 7660S chip? Thank you. [Copy link]

 

May I ask what is the function of the 7660S chip? Thank you.

蓝雨夜

Can you use a computer?

Can you use the Internet?

maychang

Either post a complete electrical schematic with the "7660S" in it, or post the manual of the "7660S", otherwise no one can explain it clearly.

EEW2018

12V single-chip CMOS voltage converters ICL7660S and ICL7660A, open circuit voltage conversion efficiency up to 99%

Time: 2017-12-27 Source: Renesas (Edited by Shiqiang) Author: Tiger

Intersil Corporation is a leading supplier of innovative power management and precision analog solutions. The ICL7660S and ICL7660A Super Voltage Converters are single-chip CMOS voltage conversion ICs from Intersil that offer significant performance advantages over other similar devices.

They are direct replacements for the industry standard ICL7660, offering an extended operating supply voltage range up to 12V with lower supply current. A frequency boost pin is included to enable the user to achieve lower output impedance despite using very small capacitors.

The ICL7660S and ICL7660A perform positive to negative supply voltage conversion over an input voltage range of 1.5V to 12V, generating complementary output voltages from -1.5V to -12V. Only two non-critical external capacitors are required to implement the charge pump and charge reservoir functions. The ICL7660S and ICL7660A can be connected together as a voltage doubler, generating an output voltage up to 22.8V at a 12V input. They can also be used as a voltage doubler or voltage divider.

Each chip contains a series connected DC power regulator, RC oscillator, level shifter and four output power MOS switches. The oscillator oscillates at a nominal frequency of 10kHz with an input supply voltage of 5.0V under no-load conditions. This frequency can be reduced by adding an external capacitor to the "OSC" terminal, or the oscillator can be overdriven by an external clock.

The "LV" terminal can be connected to GND to turn on the internal series regulator and improve low voltage (LV) operation. At medium to high voltages (3.5V to 12V), the LV pin is left floating to prevent the device from latching up. In some applications, an external Schottky diode from VOUT to CAP- is required to ensure latch-free operation.

Figure 1 Package outline of single-chip CMOS voltage converters ICL7660S and ICL7660A

Single chip CMOS voltage converter ICL7660S and ICL7660A main features:

Guaranteed lowest maximum supply current over all temperature ranges

Wide operating voltage range: 1.5V to 12V

100% tested at 3V

Boost pin (pin 1) for higher switching frequency

Guaranteed 96% minimum power efficiency

Improved conversion efficiency of 99% minimum open circuit voltage

Improved SCR lockout protection

Simple conversion of +5V logic supply to ±5V supplies

Simple voltage multiplication VOUT = (-) nVIN

Easy to use; requires only two external non-critical passive components

Direct replacement for industry standard ICL7660 and other secondary source devices

Operating temperature range:

ICL7660SI , ICL7660AI : -40℃～+85℃

ICL7660SC , ICL7660AC : 0℃～+70℃

Lead-free (RoHS compliant)

Applications of single chip CMOS voltage converters ICL7660S and ICL7660A:

Simple conversion of +5V to ±5V supplies

Voltage doubler, VOUT = ±nVIN

Negative power supply for data acquisition systems and instruments

RS232 power supply

Power supply voltage divider, VOUT = ±VS

EEW2018

maychang posted on 2019-9-17 08:44 Either post a complete electrical schematic diagram with this "7660S" in it, or post the manual of "7660S", otherwise who...

Thank you very much. Please refer to the following.

EEW2018

Blue Rainy Night posted on 2019-9-17 08:36 Can you use a computer? Can you surf the Internet?

Thank you very much. Please refer to the following.

EEW2018

https://www.sekorm.com/news/9287.html

蓝雨夜

EEW2018 posted on 2019-9-18 10:53 Thank you very much. Please refer to the following.

Are you a forum administrator?

蓝雨夜

EEW2018 posted on 2019-9-18 10:53 Thank you very much. Please refer to the following.

Are you a forum administrator?

maychang

EEW2018 Published on 2019-9-18 10:51 12V single chip CMOS voltage converter ICL7660S and ICL7660A, open circuit voltage conversion efficiency up to 99% Time: 2017-12-27 Come...

This text makes it very clear: "The ICL7660S and ICL7660A perform positive to negative supply voltage conversion over an input voltage range of 1.5V to 12V, generating complementary output voltages of -1.5V to -12V."

Isn’t that enough?