Tiny programmable battery chargers integrate current manager

Tiny programmable battery chargers integrate current manager

The SMB136 and SMB137B programmable battery charger ICs use proprietary CurrentPath current manager technology to provide dual input source and dual output for system and battery operation even with a dead or missing battery. Both products support all battery-charging standards: USB 2.0 Specification, USB On-The-Go Supplement, USB Battery Charging Specification 1.0, IEEE1725 Standard, and the Chinese USB Charging Specification. They detect the input source type (USB host/hub, ac/dc) and automatically optimize operation for the fastest and safest battery charging.

The charger ICs are based on a 3-MHz switch-mode architecture, with minimal external components. The proprietary TurboCharge technology enables up to 750-mA output from 500-mA USB source, and allows both input and output current path control. The SMB136 features one power input that allows USB500/100 or ac/dc (700 to 1,400-mA) operation. The SMB137B features two power inputs, one for supporting ac/dc power sources and the second for supporting USB power sources. They are suitable for any portable device.

Both products operate with an input range from 3.5 to 6.2-V input and withstand continuous input overvoltage up to 18 V (nonoperating), while protecting downstream circuitry. The ICs are offered in a 3.0 x 2.5-mm 30-ball CSP with an operating temperature range of –30° to 85°C. (Ea/10,000: SMB136, $1.27; SMB137B, $1.36 — available now.)

Summit Microelectronics , Sunnyvale , CA
Information 408-523-1000
http://www.summitmicro.com