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BQ2000TS Datasheet(PDF) 2 Page - Texas Instruments |
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BQ2000TS Datasheet(HTML) 2 Page - Texas Instruments |
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2 / 18 page  2 Pin Descriptions SNS Current-sense input Enables the bq2000 to sense the battery cur- rent via the voltage developed on this pin by an external sense-resistor connected in se- ries with the battery pack VSS System Ground LED Charge-status output Open-drain output that indicates the charg- ing status by turning on, turning off, or flashing an external LED BAT Battery-voltage input Battery-voltage sense input. A simple resistive divider, across the battery terminals, generates this input. TS Temperature-sense input Input for an external battery-temperature monitoring circuit. An external resistive di- vider network with a negative tempera- ture-coefficient thermistor sets the lower and upper temperature thresholds. RC Timer-program input RC input used to program the maximum charge-time, hold-off period, and trickle rate during the charge cycle, and to disable or enable top-off charge VCC Supply-voltage input MOD Modulation-control output Push-pull output that controls the charging current to the battery. MOD switches high to enable charging current to flow and low to inhibit charging- current flow. Functional Description The bq2000 is a versatile, multi-chemistry battery- charge control device. See Figure 1 for a functional block diagram and Figure 2 for a state diagram. bq2000 bq2000BD.eps Voltage Reference Internal OSC Clock Phase Generator ADC OSC SNS TS MOD RC BAT LED VCC VSS Timer PVD ALU Voltage Comparator Voltage Comparator Charge Control Figure 1. Functional Block Diagram |
Similar Part No. - BQ2000TS |
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Similar Description - BQ2000TS |
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