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BQ24109RHLTG4 Datasheet(PDF) 6 Page - Texas Instruments |
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BQ24109RHLTG4 Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 38 page  bq24100 ,, bq24103,, bq24103A bq24104, bq24105, bq24108, bq24109 bq24113, bq24113A, bq24115 SLUS606N – JUNE 2004 – REVISED NOVEMBER 2008 .................................................................................................................................................. www.ti.com TERMINAL FUNCTIONS TERMINAL bq24100, bq24103, I/O DESCRIPTION bq24113, NAME bq24108, bq24103A bq24105 bq24115 bq24113A bq24109 bq24104 Battery voltage sense input. Bypass it with a 0.1 µF capacitor to PGND if BAT 14 14 14 14 14 I there are long inductive leads to battery. Charger enable input. This active low input, if set high, suspends charge CE 16 16 16 16 16 I and places the device in the low-power sleep mode. Do not pull up this input to VTSB. Available on parts with fixed output voltage. Ground or float for single-cell CELLS 13 13 I operation (4.2 V). For two-cell operation (8.4 V) pull up this pin with a resistor to VCC. Charge mode selection: low for precharge as set by ISET2 pin and high CMODE 7 7 I (pull up to VTSB or <7 V) for fast charge as set by ISET1. Output voltage analog feedback adjustment. Connect the output of a FB 13 13 I resistive voltage divider powered from the battery terminals to this node to adjust the output battery voltage regulation. IN 3, 4 3, 4 3, 4 3, 4 3, 4 I Charger input voltage. Charger current set point 1 (fast charge). Use a resistor to ground to set ISET1 8 8 8 8 8 I/O this value. Charge current set point 2 (precharge and termination), set by a resistor connected to ground. A low-level CMODE signal selects the ISET2 charge ISET2 9 9 9 9 9 I/O rate, but if the battery voltage reaches the regulation set point, bqSWITCHER changes to voltage regulation regardless of CMODE input. N/C 13 19 19 - No connection. This pin must be left floating in the application. 1 1 1 1 1 O Charge current output inductor connection. Connect a zener TVS diode OUT between OUT pin and PGND pin to clamp the voltage spike to protect the 20 20 20 20 20 O power MOSFETs during abnormal conditions. Power-good status output (open drain). The transistor turns on when a PG 5 5 5 5 5 O valid VCC is detected. It is turned off in the sleep mode. PG can be used to drive a LED or communicate with a host processor. PGND 17,18 17,18 17,18 17,18 17, 18 Power ground input Charge current-sense input. Battery current is sensed via the voltage drop SNS 15 15 15 15 15 I developed on this pin by an external sense resistor in series with the battery pack. A 0.1- µF capacitor to PGND is required. Charge status 1 (open-drain output). When the transistor turns on STAT1 2 2 2 2 2 O indicates charge in process. When it is off and with the condition of STAT2 indicates various charger conditions (See Table 1) Charge status 2 (open-drain output). When the transistor turns on STAT2 19 19 19 O indicates charge is done. When it is off and with the condition of STAT1 indicates various charger conditions (See Table 1) Temperature sense input. This input monitors its voltage against an internal threshold to determine if charging is allowed. Use an NTC TS 12 12 12 12 12 I thermistor and a voltage divider powered from VTSB to develop this voltage. (See Figure 10) Timer and termination control. Connect a capacitor from this node to GND TTC 7 7 7 I to set the bqSWITCHER timer. When this input is low, the timer and termination detection are disabled. VCC 6 6 6 6 6 I Analog device input. A 0.1 µF capacitor to VSS is required. VSS 10 10 10 10 10 Analog ground input TS internal bias regulator voltage. Connect capacitor (with a value VTSB 11 11 11 11 11 O between a 0.1- µF and 1-µF) between this output and VSS. There is an internal electrical connection between the exposed thermal pad and VSS. The exposed thermal pad must be connected to the same Exposed potential as the VSS pin on the printed circuit board. The power pad can Thermal Pad Pad Pad Pad Pad be used as a star ground connection between VSS and PGND. A common Pad ground plane may be used. VSS pin must be connected to ground at all times. 6 Submit Documentation Feedback Copyright © 2004–2008, Texas Instruments Incorporated Product Folder Link(s): bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A bq24115 |
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