BQ76PL536APAPR datasheet(54/74 Pages) TI1

54 / 74 page

bq76PL536A

SLUSAD3B – JUNE 2011 – REVISED JANUARY 2016

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8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The bq76PL536A is a series-cell Lithium-Ion battery monitor and secondary protector for Uninterruptible Power

Systems (UPS), E-Bikes and Scooters, Large-Format Battery Systems, and so forth. To allow for optimal

performance in the end application, special consideration must be taken to ensure minimization of measurement

error through proper printed circuit board (PCB) layout.

8.1.1 Anti-Aliasing Filter

An anti-aliasing filter is required for each VCn input VC6–VC1, consisting of a 1-k

Ω, 1% series resistor and 100-

nF capacitor. Good-quality components should be used. A 1% resistor is recommended, because the resistor

creates a small error by forming a voltage divider with the input impedance of the part. The part is factory-

trimmed to compensate for the error introduced by the filter.

8.1.2 Host SPI Interface Pin States

The CS_H pin is active-low. The host asserts the pin to a logic zero to initiate communications. The CS pin

should remain low until the end of the current packet. When the CS_H pin is asserted, the SPI receiver and

interface of the device are reset and resynchronized. This action ensures that a slave device that has lost

synchronization during a previous transmission or as the result of noise on the bus does not remain permanently

hung. CS_H must be driven false (high) between packets; see Timing Characteristics – AC SPI Data Interface for

timing details.

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