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BQ24295RGET Datasheet(PDF) 6 Page - Texas Instruments |
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BQ24295RGET Datasheet(HTML) 6 Page - Texas Instruments |
6 / 45 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 – bq24295 bq24295 SLUSBC1 – SEPTEMBER 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 contact detection (DCD) and primary detection in bc1.2. Analog D– 3 I Negative line of the USB data line pair. D+/D– based USB host/charging port detection. The detection includes data contact detection (DCD) and primary detection in bc1.2. Analog 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 OTG Enable pin. The boost mode is activated when the OTG pin is High, REG01[5], and no Input source is detected at VBUS. Digital 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). BAT 13,14 P Battery connection point to the positive terminal of the battery pack. The internal BATFET is connected between BAT and SYS. Connect a 10uF closely to the BAT pin. SYS 15,16 I System connection point. The internal BATFET is connected between BAT and SYS. When the battery falls below the minimum system voltage, switch-mode converter keeps SYS above the minimum system voltage. PGND 17,18 P Power ground connection for high-current power converter node. Internally, PGND is connected to the source of the n- channel LSFET. On PCB layout, connect directly to ground connection of input and output capacitors of the charger. A single point connection is recommended between power PGND and the analog GND near the IC PGND pin. SW 19,20 O Switching node connecting to output inductor. Internally SW is connected to the source of the n-channel HSFET and the drain of the n-channel LSFET. Connect the 0.047µF bootstrap capacitor from SW to BTST. 6 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq24295 |
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