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BQ24297 Datasheet(PDF) 6 Page - Texas Instruments |
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BQ24297 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 48 page STAT SCL SDA PGND PGND SYS SYS 4 5 6 7 8 9 15 16 17 18 22 23 24 1 2 3 BAT BAT 13 14 19 20 21 10 11 12 VBUS D+ D – bq24297 STAT SCL SDA PGND PGND SYS SYS 4 5 6 7 8 9 15 16 17 18 22 23 24 1 2 3 BAT BAT 13 14 19 20 21 10 11 12 VBUS PSEL PG bq24296 bq24296 bq24297 SLUSBP6A – SEPTEMBER 2013 – REVISED OCTOBER 2013 www.ti.com PINOUTS PIN FUNCTIONS PIN TYPE DESCRIPTION NAME NO. VBUS 1,24 P Charger Input Voltage. The internal n-channel reverse block MOSFET (RBFET) is connected between VBUS and PMID with VBUS on source. Place a 1µF ceramic capacitor from VBUS to PGND and place it as close as possible to IC. D+ 2 I Positive line of the USB data line pair. D+/D– based USB host/charging port detection. The detection includes data (bq24297) contact detection (DCD), primary detection in bc1.2, and non-standard adapters. Analog PSEL 2 I Power source selection input. High indicates a USB host source and Low indicates an adapter source. (bq24296) D– 3 I Negative line of the USB data line pair. D+/D– based USB host/charging port detection. The detection includes data (bq24297) contact detection (DCD), primary detection in bc1.2, and non-standard adapters. Analog PG 3 O Open drain active low power good indicator. Connect to the pull up rail via 10kohm resistor. LOW indicates a good input (bq24296) source if the input voltage is between UVLO and ACOV, above SLEEP mode threshold, and current limit is above 30mA. STAT 4 O Open drain charge status output to indicate various charger operation. Connect to the pull up rail via 10kohm. LOW indicates charge in progress. HIGH indicates charge complete or charge disabled. When any fault condition occurs, STAT pin in the charge blinks at 1Hz. SCL 5 I I2C Interface clock. Connect SCL to the logic rail through a 10k Ω resistor. SDA 6 I/O I2C Interface data. Connect SDA to the logic rail through a 10k Ω resistor. INT 7 O Open-drain Interrupt Output. Connect the INT to a logic rail via 10k Ω resistor. The INT pin sends active low, 256us pulse to host to report charger device status and fault. OTG 8 I USB current limit selection pin during buck mode, and active high enable pin during boost mode. Digital For bq24296, when in buck mode with USB host (PSEL=High), when OTG = High, IIN limit = 500mA and when OTG = Low, IIN limit = 100mA. For bq24297, when in buck mode with USB host, when OTG = High, IIN limit = 500mA and when OTG = Low, IIN limit = 100mA. The boost mode is activated when the REG01[4]=1 and OTG pin is High. CE 9 I Active low Charge Enable pin. Battery charging is enabled when REG01[5:4]=01 and CE pin = Low. CE pin must be pulled high or low. ILIM 10 I ILIM pin sets the maximum input current limit by regulating the ILIM voltage at 1V. A resistor is connected from ILIM pin to ground to set the maximum limit as IINMAX = (1V/RILIM) × KILIM. The actual input current limit is the lower one set by ILIM and by I2C REG00[2:0]. The minimum input current programmed on ILIM pin is 500mA. TS 11 I Temperature qualification voltage input #1. Connect a negative temperature coefficient thermistor. Program temperature window with a resistor divider from REGN to TS1 to GND. Charge suspends or Boost disable disable when TS pin is out Analog of range. Recommend 103AT-2 thermistor. QON 12 I BATFET enable control in shipping mode. A logic low to high transition on this pin with minimum 2ms high level turns on BATFET to exit shipping mode. It has internal 1M Ω (typ.) pull down. For backward compatibility, when BATFET enable control function is not used, the pin can be no connect or tied to TS pin. (Please refer to Shipping Mode for detail description). 6 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq24296 bq24297 |
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