BQ40Z50-R1 datasheet(39/56 Pages) TI2

No de pièce	BQ40Z50-R1

Description	bq40z50-R1 1-Series, 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager

PDF	56 Pages

Scroll/Zoom	100%

Fabricant	TI2 [Texas Instruments]

Site Internet	https://www.ti.com

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bq40z50-R1

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SLUSCB3 – JULY 2015

Figure 34. Thermistor Drive

9.2.2.3.5

LEDs

Three LED control outputs provide constant current sinks for the driving external LEDs. These outputs are

configured to provide voltage and control for up to 5 LEDs. No external bias voltage is required. Unused

LEDCNTL pins can remain open or they can be connected to VSS. The DISP pin should be connected to VSS, if

the LED feature is not used.

Figure 35. LEDs

9.2.2.3.6

Safety PTC Thermistor

The bq40z50-R1 device provides support for a safety PTC thermistor. The PTC thermistor is connected between

the PTC pin and VSS. It can be placed close to the CHG/DSG FETs to monitor the temperature. The PTC pin

outputs a very small current, typical ~370 nA, and the PTC fault will be triggered at ~0.7 V typical. A PTC fault is

one of the permanent failure modes. It can only be cleared by a POR.

To disable this feature, connect a 10-k

Ω resistor between PTC and VSS.

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BQ40Z50-R1 Fiches technique(PDF) 39 Page - Texas Instruments