BQ40Z50-R2 datasheet(37/51 Pages) TI1

No. de pieza	BQ40Z50-R2

Descripción Electrónicos	1-Series, 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager

PDF	51 Pages

Scroll/Zoom	100%

Fabricante Electrónico	TI1 [Texas Instruments]

Página de inicio	http://www.ti.com

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bq40z50-R2

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SLUSCS4 – JUNE 2017

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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-R2 device provides support for a safety PTC thermistor. The PTC thermistor is connected between

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

monitors the voltage at the pin and will trip if the thermistor resistance exceeds the defined threshold. A PTC fault

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

To disable, connect PTC and PTCEN to VSS.

Figure 36. PTC Thermistor

BQ40Z50-R2 Datasheet(PDF) 37 Page - Texas Instruments