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首 页 > 新闻动态 > 公司新闻 > 供应 BQ2011SN-D118G4 TI 镍镉电池电量监测计用于高放电率（> 5A） 供应 BQ2011SN-D118G4 TI 镍镉电池电量监测计用于高放电率（> 5A）Features
➤ Conservative and repeatable measurement of available charge in rechargeable batteries ➤ Designed for portable equipment such as power tools with high discharge rates ➤ Designed for battery pack integration - 120μA typical standby current (self-discharge estimation mode) - Small size enables implementations in as little as 1 2 square inch of PCB ➤ Direct drive of LEDs for capacity display ➤ Self-discharge compensation using internal temperature sensor ➤ Simple single-wire serial communications port for subassembly testing ➤ 16-pin narrow SOIC General Description The bq2011 Gas Gauge IC is intended for battery-pack installation to maintain an accurate record of available battery charge. The IC monitors a voltage drop across a sense resistor connected in series between the negative battery terminal and ground to determine charge and discharge activity of the battery. The bq2011 is designed for systems such as power tools with very high discharge rates. Battery self-discharge is estimated based on an internal timer and temperature sensor. Compensations for battery temperature and rate of charge or discharge are applied to the charge, d i s charge, and selfdischarge calculations to provide available charge information across a wide range of operating conditions. Initial battery capacity is set using the PFC and MODE pins. Actual battery capacity is automatically “learned” in the course of a discharge cycle from full to empty and may be displayed depending on the display mode. Nominal available charge may be directly indicated using a five-segment LED display. These segments are used to indicate graphically the nominal available charge. The bq2011 supports a simple singleline bidirectional serial link to an external processor (common ground). The bq2011 outputs battery information in response to external commands over the serial link. To support subassembly testing, the outputs may also be controlled by command. The external processor may also overwrite some of the bq2011 gas gauge data registers. The bq2011 may operate directly from four cells. With the REF output and an external transistor, a simple, inexpensive regulator can be built to provide VCC from a greater number of cells. Internal registers include available charge, temperature, capacity, battery ID, and battery status. 1 Gas Gauge IC for High Discharge Rates 2/96 E Pin Connections Pin Names 1 PN201101.eps 16-Pin Narrow SOIC 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC REF NC DQ RBI SB DISP SR MODE SEG1 SEG2 SEG3 SEG4 SEG5 PFC VSS MODE Display mode output SEG1 LED segment 1 SEG2 LED segment 2 SEG3 LED segment 3 SEG4 LED segment 4 SEG5 LED segment 5 PFC Programmed full count selection input REF Voltage reference output NC No connect DQ Serial communications input/output RBI Register backup input SB Battery sense input DISP Display control input SR Sense resistor input VCC 3.0–6.5V VSS Negative battery |
