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BQ20Z65DBT-R1 Datasheet(PDF) 4 Page - Texas Instruments |
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BQ20Z65DBT-R1 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 23 page bq20z65-R1 SLUS990 – DECEMBER 2009 www.ti.com TERMINAL FUNCTIONS TERMINAL I/O(1) DESCRIPTION NO. NAME 1 DSG O High side N-chan discharge FET gate drive Battery pack input voltage sense input. It also serves as device wake up when device is in shutdown 2 PACK IA, P mode. Positive device supply input. Connect to the center connection of the CHG FET and DSG FET to 3 VCC P ensure device supply either from battery stack or battery pack input 4 ZVCHG O P-chan pre-charge FET gate drive High voltage general purpose open drain output. Can be configured to be used in pre-charge 5 GPOD OD condition Pre-charge mode setting input. Connect to PACK to enable 0v pre-charge using charge FET 6 PMS I connected at CHG pin. Connect to VSS to disable 0V pre-charge using charge FET connected at CHG pin. 7 VSS P Negative supply voltage input. Connect all VSS pins together for operation of device 8 REG33 P 3.3V regulator output. Connect at least a 2.2 μF capacitor to REG33 and VSS 9 TOUT P Thermistor bias supply output 10 VCELL+ - Internal cell voltage multiplexer and amplifier output. Connect a 0.1 μF capacitor to VCELL+ and VSS Alert output. In case of short circuit condition, overload condition and watchdog time out this pin will 11 ALERT OD be triggered. 12 NC - Not used - leave floating 13 TS1 IA 1st Thermistor voltage input connection to monitor temperature 14 TS2 IA 2nd Thermistor voltage input connection to monitor temperature 15 PRES I Active low input to sense system insertion. Typically requires additional ESD protection. Active low input to detect secondary protector status, and to allow the bq20z65-R1 to report the 16 PFIN I status of the 2nd level protection input. 17 SAFE OD Active high output to enforce additional level of safety protection; e.g., fuse blow. SMBus data open-drain bidirectional pin used to transfer address and data to and from the 18 SMBD I/OD bq20z65-R1 19 NC - Not used - leave floating SMBus clock open-drain bidirectional pin used to clock the data transfer to and from the 20 SMBC I/OD bq20z65-R1 Display control for the LEDs. This pin is typically connected to VCC via a 100k Ω resistor and a push 21 DISP I button switch connected to VSS. 22 VSS P Negative supply voltage input. Connect all VSS pins together for operation of device 23 LED1 I LED1 display segment that drives an external LED depending on the firmware configuration 24 LED2 I LED2 display segment that drives an external LED depending on the firmware configuration 25 LED3 I LED3 display segment that drives an external LED depending on the firmware configuration 26 LED4 I LED4 display segment that drives an external LED depending on the firmware configuration 27 LED5 I LED5 display segment that drives an external LED depending on the firmware configuration 28 GSRP IA Coulomb counter differential input. Connect to one side of the sense resistor 29 GSRN IA Coulomb counter differential input. Connect to one side of the sense resistor Master reset input that forces the device into reset when held low. Must be held high for normal 30 MRST I operation. Connect to RESET for correct operation of device 31 VSS P Negative supply voltage input. Connect all VSS pins together for operation of device 32 REG25 P 2.5V regulator output. Connect at least a 1mF capacitor to REG25 and VSS RAM / Register backup input. Connect a capacitor to this pin and VSS to protect loss of RAM / 33 RBI P Register data in case of short circuit condition. 34 VSS P Negative supply voltage input. Connect all VSS pins together for operation of device 35 RESET O Reset output. Connect to MSRT. 36 ASRN IA Short circuit and overload detection differential input. Connect to sense resistor 37 ASRP IA Short circuit and overload detection differential input. Connect to sense resistor (1) I = Input, IA = Analog input, I/O = Input/output, I/OD = Input/Open-drain output, O = Output, OA = Analog output, P = Power 4 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s): bq20z65-R1 |
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