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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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TEA1200TS 데이터시트(PDF) 2 Page - NXP Semiconductors |
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TEA1200TS 데이터시트(HTML) 2 Page - NXP Semiconductors |
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2 / 24 page  2002 May 14 2 Philips Semiconductors Product specification 0.95 V starting DC-to-DC converter with low battery indicator TEA1200TS FEATURES • Complete DC-to-DC converter circuit and battery low detector • Configurable for 1, 2 or 3-cell Nickel-Cadmium (NiCd) or Nickel Metal Hydride (NiMH) batteries and 1 Lithium Ion (Li-Ion) battery • Guaranteed DC-to-DC converter start-up from 1-cell NiCd or NiMH battery, even with a load current • Upconversion or downconversion • Internal power MOSFETs featuring a low RDSon of approximately 0.1 Ω • Synchronous rectification for high efficiency • Soft start • PWM-only operating option • Stand-alone low battery detector requires no additional supply voltage • Low battery detection level at 0.90 V, externally adjustable to a higher level • Adjustable output voltages • Shut-down function • Small outline package • 0.6 µm BICMOS process. APPLICATIONS • Cellular phones • Cordless phones • Personal Digital Assistants (PDAs) • Portable audio players • Pagers • Mobile equipment. GENERAL DESCRIPTION The TEA1200TS 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 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 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 RDSon and fully synchronous rectification. The 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 low battery detector has a built-in detection level which is optimum for a 1-cell NiCd or NiMH battery. ORDERING INFORMATION TYPE NUMBER PACKAGE NAME DESCRIPTION VERSION TEA1200TS SSOP16 plastic shrink small outline package; 16 leads; body width 4.4 mm SOT369-1 |
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