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BQ2007 Datasheet(PDF) 1 Page - Texas Instruments |
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BQ2007 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 16 page  Features ➤ Fast charging and conditioning of NiCd and NiMH batteries - Precise charging independent of battery pack number of cells - Discharge-before-charge on demand - Pulse trickle charge conditioning - Battery undervoltage and overvoltage protection ➤ Built-in 10-step voltage-based charge status monitoring - Charge status display options include seven-segment monotonic bargraph and fully decoded BCD digit - Display interface options for direct drive of LCD or LED segments - Charger state status indicators for pending, discharge, charge, completion, and fault - Audible alarm for charge completion and fault conditions ➤ Charge control flexibility - Fast or Standard speed charging - Top-off mode for NiMH - Charge rates from C 8 to 2C (30 minutes to 8 hours) ➤ Charge termination by: - Negative delta voltage (-∆V) - Peak voltage detect (PVD) - Maximum voltage - Maximum time - Maximum temperature ➤ High-efficiency switch-mode de- sign - Ideal for small heat-sensitive enclosures ➤ 24-pin, 300-mil SOIC or DIP General Description The bq2007 is a highly integrated monolithic CMOS IC designed to pro- vide intelligent battery charging and charge status monitoring for stand- alone charge systems. The bq2007 provides a wide variety of charge status display formats. The bq2007 internal charge status moni- tor supports up to a seven-segment bargraph or a single BCD digit dis- play. The bargraph display indicates up to seven monotonic steps, whereas the BCD digit counts in ten steps of 10% increments. The bq2007 output drivers can direct-drive either an LCD or LED display. Charge action begins either by appli- cation of the charging supply or by replacement of the battery pack. For safety, charging is inhibited until battery temperature and voltage are within configured limits. 1 1 PN200701.eps 24-Pin Narrow DIP or SOIC 2 3 4 5 6 7 8 24 23 22 21 20 19 18 17 9 10 16 15 11 12 14 13 SEGC/MSEL SEGB SEGA LED1 LED2 INH COM ALARM TM VSEL FAST DCMD SEGD/DSEL1 SEGE/DSEL2 SEGF/MULT SEGG/QDSEL MOD VCC VSS DIS TS BAT SNS TCO Fast-Charge IC bq2007 Pin Connections Pin Names SEGC/ Display output segment C/ MSEL driver mode select SEGB Display output segment B SEGA Display output segment A LED1 Charge status output 1 LED2 Charge status output 2 INH Charge inhibit input COM Common LED/LCD output ALARM Audio alarm output TM Timer mode select VSEL Voltage termination select FAST Fast charge rate select DCMD Discharge command TCO Temperature cutoff SNS Sense resistor input BAT Battery voltage TS Temperature sense DIS Discharge control VSS System ground VCC 5.0V ±10% power MOD Modulation control SEGG/ Display output segment G/ QDSEL charge status display select SEGF/ Display output segment F/ MULT multi-cell pack select SEGE/ Display output segment E/ DSEL2 display select 2 SEGD/ Display output segment D/ DSEL1 display select 1 9/96 B |
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