Features
- Automatically Connects Output to the Greater of Either Input Supply Voltage
- If Main Power to External Equipment is Lost, Circuit Will Automatically Connect Battery Backup
- Reconnects Main Power When Restored
- Logic Indicator Signaling Status of Main Power
- Low Impedance Connection Switches
- Low Internal Power Consumption
- Wide Supply Range: 2.5V to 15V
- Low Leakage Between Inputs
- External Transistors May Be Added if Very Large Currents Need to Be Switched
- Pb-Free Plus Anneal Available (RoHS Compliant)
Description
The Intersil ICL7673 is a monolithic CMOS battery backup circuit that offers unique performance advantages over conventional means of switching to a backup supply. The ICL7673 is intended as a low-cost solution for the switching of systems between two power supplies; main and battery backup. The main application is keep-alive-battery power switching for use in volatile CMOS RAM memory systems and real time clocks. In many applications this circuit will represent a low insertion voltage loss between the supplies and load. This circuit features low current consumption, wide operating voltage range, and exceptionally low leakage between inputs. Logic outputs are provided that can be used to indicate which supply is connected and can also be used to increase the power switching capability of the circuit by driving external PNP transistors.
Applications
- On Board Battery Backup for Real-Time Clocks, Timers, or Volatile RAMs
- Over/Under Voltage Detector
- Peak Voltage Detector
- Other Uses: Portable Instruments, Portable Telephones, Line Operated Equipment
Support Communities
-
Question about ICL7673
... power the board. I was hoping to also connect a non rechargable 3v battery ( a 123 battery with 1500mA) to use as a backup. The ICL7673 seemed perfect for the job until i realized that it has a peak current of 38mA for either primary or secondary source. I really ...
Feb 22, 2020 -
I have a question about the ICL7673
Hello, I have a question about the ICL7673. I am developing a product that uses a micro controller and an NRF24L1 to capture data and transmit it. The main power comes from 2 1 Farad 5v super capacitors that are charged by a 6V solar panel. I would like to ...
Feb 21, 2020
Support Communities
