STMicroelectronics Inc. (STM, Geneva) introduced the TSM105 controller chip for use in battery chargers and power adapters. Featuring a small package and minimum overall component count, the TSM105 is suitable for meeting the power needs of the latest generation of small mobile devices, in particular, battery chargers for cellular phones and other portable equipment, as well as in power adapters for laptop computers, personal digital assistants and electronic games.
The TSM105 combines a voltage reference, two operational amplifiers with common collector OR'ed outputs and a current-sensing circuit. It is offered in a space-saving SOT23-5L package. The TSM105 also features a constant voltage and constant current control, low-voltage operation, a current-sink output stage, easy compensation, low ac line-voltage rejection, and low-side current sensing. The TSM105 operates from a Vcc of 2.8V to 12V. In addition, the total output supply current over a full temperature range is 2mA, maximum; 1.05mA, typical; and the voltage reference output is 1.21V, typical.
The TSM105 controller for battery chargers and power adapters comes in a SOT23-5L or SO-8 package. Samples and volume production are available now for $0.25 in quantities of 1,000 units.
