SAA1504T is a protection circuit for single cell Li-ion battery packs. It features zero voltage start-up, overcharge protection, overdischarge protection and temperature protection.
The SAA1504T is an integrated circuit manufactured in a BCD Power Logic 70 process, designed to protect single-cell Li-ion battery packs against overcharge, overdischarge, and overcurrent. It is specifically intended for use in battery packs for portable telephones such as GSM devices. The circuit continuously monitors battery voltage, current, and junction temperature to ensure safety and extend battery life.
| Package Type | SO8 |
|---|---|
| Power-down Supply Current | 150 nA |
| Charge Inhibit Voltage Threshold | > 4.18 V |
| Power-down Release Voltage | 2.6 V |
| Power-down Detection Voltage | < 2.3 V |
| Maximum Junction Temperature for Release | 60 °C |
It is intended to be used as a protection circuit for single cell Li-ion battery packs, especially for portable telephones such as GSM.
The safety IC enters the Power-down mode, where SW2 is open to block further discharge and supply current is reduced to 150 nA.