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BQ24400DG4 Datasheet(PDF) 2 Page - Texas Instruments |
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BQ24400DG4 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 27 page bq24400 SLUS498A – SEPTEMBER 2001 – REVISED FEBRUARY 2010 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. PIN DESCRIPTIONS SNS Current-sense input Enables the bq24400 to sense the battery current via the voltage developed on this pin by an external sense-resistor connected in series with the battery pack VSS System Ground Connect to the battery’s negative terminal LED Charge-status output Open-drain output that indicates the charging status by turning on, turning off, or flashing an external LED, driven through a resistor. 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 divider network with a negative temperature-coefficient thermistor sets the lower and upper temperature thresholds. RC Timer-program input Used to program the maximum fast charge-time, maximum top-off charge-time, hold-off period, trickle charge rate, and to disable or enable top-off charge. A capacitor from VCC and a resistor to ground connect to this pin. VCC Supply-voltage input Recommended bypassing is 10µF + 0.1µF to 0.22µF of decoupling capacitance near the pin. 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. 2 Submit Documentation Feedback Copyright © 2001–2010, Texas Instruments Incorporated Product Folder Link(s): bq24400 |
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