TEA1201TS

The TEA1201TS is a fully integrated battery power unit including a high-efficiency DC-to-DC converter which runs from a 1-cell NiCd or NiMH battery, a current switch and a low battery detector. The circuit can be arranged in several ways to optimize the application circuit of a power supply system. Therefore, the DC-to-DC converter can be arranged for upconversion or downconversion and the low battery detector can be configured for several types of batteries. Accurate low battery detection is possible while all other blocks are switched off.

The TEA1201TS DC-to-DC converter features efficient, compact and dynamic power conversion using a digital control concept comparable with Pulse Width Modulation (PWM) and Pulse Frequency Modulation (PFM), integrated CMOS power switches with a very low R_DSon and fully synchronous rectification.

The TEA1201TS device operates at a switching frequency of 600 kHz which enables the use of external components with minimum size. The switching frequency can be synchronized to an external high frequency clock signal. Optionally, the device can be kept in PWM control mode only. Deadlock is prevented by an on-chip undervoltage lockout circuit.

Active current limiting enables efficient conversion in pulsed-load systems such as Global System for Mobile communication (GSM) and Digital Enhanced Cordless Telecommunications (DECT).

The TEA1201TS switch can be used to control the connection of (a part of) the output load. It shows a low pin-to-pin resistance of 500 mW.

The low battery detector has a built-in detection level which is optimum for a 1-cell NiCd or NiMH battery.