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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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BQ2014H 데이터시트(PDF) 1 Page - Texas Instruments |
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BQ2014H 데이터시트(HTML) 1 Page - Texas Instruments |
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1 / 22 page  Features ➤ Accurate measurement of avail- able capacity in NiCd or NiMH batteries ➤ Low-cost battery management so- lution for pack integration - As little as 1 2 square inch of PCB for complete circuit - Low operating current (120µA typical) - Less than 100nA of data retention current ➤ High-speed (5kb/s) single-wire communication interface (HDQ bus) for critical battery parameters ➤ Communication with an external charge controller such as the bq2004 ➤ Direct drive of remaining capacity LEDs ➤ Automatic rate and temperature compensation of measurements ➤ 16-pin narrow SOIC General Description The bq2014H NiCd/NiMH Gas Gauge IC is intended for battery- pack or in-system installation to maintain an accurate record of available battery capacity. The IC monitors a voltage drop across a sense resistor connected in series between the negative battery termi- nal and ground to determine charge and discharge activity of the battery. Compensations for bat- tery temperature, self-discharge, and rate of discharge are applied to the charge counter to provide avail- able capacity information across a wide range of operating conditions. Battery capacity is automatically re- calibrated, or “learned,” in the course of a discharge cycle from full to empty. Nominal available capacity may be directly indicated using a five- segment LED display. The bq2014H also supports a simple single-line bidirectional serial link to an exter- nal processor (common ground). The 5kb/s HDQ bus interface reduces communications overhead in the external microcontroller. Internal registers include available capacity and energy, temperature, voltage and current, and battery status. The external processor may also overwrite some of the bq2014H gas gauge data registers. The bq2014H can operate from the batteries in the pack. The REF out- put and an external transistor allow a simple, inexpensive voltage regu- lator to supply power to the circuit from the cells. 1 Preliminary bq2014H LCOM LED common output SEG1/PROG1 LED segment 1/ program 1 input SEG2/PROG2 LED segment 2/ program 2 input SEG3/PROG3 LED segment 3/ program 3 input SEG4/PROG4 LED segment 4/ program 4 input SEG5/PROG5 LED segment 5/ program 5 input DONE Charge complete input 1 PN20140H..eps 16-Pin Narrow SOIC 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 LCOM SEG1/PROG1 SEG2/PROG2 SEG3/PROG3 SEG4/PROG4 SEG5/PROG5 DONE VSS VCC REF NC HDQ RBI SB DISP SR VSS System ground SR Sense resistor input DISP Display control input SB Battery sense input RBI Register backup input HDQ Serial communications input/output NC No connect REF Voltage reference output VCC Supply voltage Pin Connections SLUS030–JUNE 1999 Low-Cost NiCd/NiMH Gas Gauge IC Pin Names |
유사한 부품 번호 - BQ2014H |
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유사한 설명 - BQ2014H |
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