The LTC ®1960 is a highly integrated battery charger and selector intended for portable products using dual smart batteries. A serial SPI interface allows an external microcontroller to control and monitor status of both batteries. A proprietary PowerPath architecture supports simultaneous charging or discharging of both batteries. Typical battery run times are extended by 10%, while charging times are reduced by up to 50%. The LTC1960 automati cally switches between power sources in less than 10µs to prevent power interruption upon battery or wall adapter removal. The synchronous buck battery charger delivers 95% efficiency with only 0.5V dropout voltage, and prevents audible noise in all operating modes. Patented* input current limiting with 5% accuracy charges batteries in the shortest possible time without overloading the wall adapter. The LTC1960’s 5mm × 7mm 38-pin QFN and 36-pin narrow SSOP packages allow implementation of a complete SBS-compliant dual battery system while consum ing minimum PCB area.
The LTC1960 is a highly‑integrated dual‑battery charger and selector intended for portable products. It features a serial SPI interface for external microcontroller control, a proprietary PowerPath architecture that enables simultaneous charging or discharging of two smart batteries, and fast power‑source switching in less than 10 µs to avoid interruption.
The device is offered in 5 mm × 7 mm 38‑pin QFN and 36‑pin narrow SSOP packages and operates from a wide input voltage range up to 32 V. Its synchronous buck charger delivers 95 % efficiency with only 0.5 V dropout, and it includes programmable current limiting, low‑noise operation, and extensive protection features.
| Supply Voltage Range (DCIN) | 6 V – 28 V |
|---|---|
| Maximum Input Voltage (VIN) | 32 V |
| Battery Voltage Range (VBATT) | Up to 28 V |
| Efficiency | 95 % |
| Dropout Voltage | 0.5 V |
| Switching Frequency | 255 kHz – 345 kHz |
| VDAC Resolution | 11‑bit |
| IDAC Resolution | 10‑bit |
It automatically switches in less than 10 µs to prevent power interruption when a battery or wall adapter is removed.
A serial SPI interface allows an external microcontroller to control and monitor the status of both batteries.
The charger operates at 95 % efficiency with a dropout voltage of only 0.5 V.
It is available in a 5 mm × 7 mm 38‑pin QFN package and a 36‑pin narrow SSOP package.