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BQ2057CDGKR Datasheet(PDF) 4 Page - Texas Instruments |
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BQ2057CDGKR Datasheet(HTML) 4 Page - Texas Instruments |
4 / 30 page bq2057, bq2057C bq2057T, bq2057W SLUS025F − MAY 2001 − REVISED JULY 2002 4 www.ti.com Terminal Functions TERMINAL NO. I/O DESCRIPTION NAME SOIC (SN) and TSSOP (TS) MSOP (DGK) I/O DESCRIPTION BAT 2 8 I Voltage sense input CC 7 5 O Charge control output COMP 8 6 I Charge-rate compensation input (AutoComp) SNS 1 7 I Current sense input STAT 5 3 O Charge status output TS 4 2 I Temperature sense input VCC 3 1 I Supply voltage VSS 6 4 Ground detailed description current-sense input Battery current is sensed via the voltage developed on this pin by an external sense resistor. The external resistor can be placed on either the high or low side of the battery. (See schematics for details.) battery-voltage input Voltage sense-input tied directly to the positive side of the battery. temperature sense input Input for an external battery-temperature monitoring circuit. Connecting this input to VCC/2 disables this feature. charge-status output 3-state indication of charge in progress, charge complete, and temperature fault or sleep mode. charge-control output Source-follower output that drives an external pass-transistor (PNP or P-channel MOSFET) for current and voltage regulation. charge-rate compensation input Sets the charge-rate compensation level. The voltage-regulation output may be programmed to vary as a function of the charge current delivered to the battery. supply voltage input Power supply input and current reference for high-side sensing configuration. |
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