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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

BQ27Z561-R1

SLUSDH5 – MARCH 2019

BQ27Z561-R1 Impedance Track™ battery gas gauge solution

for 1-series cell li-ion battery packs

1

1 Features

1

•

Supports current sense resistors down to 1 mΩ

•

Supports pack-side gauging including enhanced

state of health (SOH) algorithm

•

Fast QMAX update option based on predicted

OCV

•

SHA-256 authentication responder for increased

battery pack security

•

Sophisticated charge algorithms:

–

JEITA

–

Enhanced charging

–

RSOC() charging compensation option

•

Two independent ADCs

–

Support for simultaneous current and voltage

sampling

–

High-accuracy coulomb counter with input

offset error < 1 µV (typical)

•

Low-voltage (2-V) operation

•

Wide-range current applications (1 mA to > 5 A)

•

Active high or low pulse or level interrupt pin

•

Supports battery trip point (BTP)

•

Reduced power modes (typical battery pack

operating range conditions)

–

Typical SLEEP mode: < 11 μA

–

Typical DEEP SLEEP mode: < 9 μA

–

Typical OFF mode: < 1.9 μA

•

Internal and external temperature sense functions

•

Diagnostic lifetime data monitor and black box

recorder

•

high-speed programming and data access

•

HDQ one-wire for Ccommunication with host

•

Compact 12-pin DSBGA package (YPH)

2 Applications

•

Smartphones

•

Digital still and video cameras

•

Tablet computing

•

Portable and wearable health devices and

portable audio devices

3 Description

The Texas Instruments BQ27Z561-R1 Impedance

Track™ gas gauge solution is a highly integrated,

accurate 1-series cell gas gauge with a flash

programmable custom reduced instruction-set CPU

(RISC) and SHA-256 authentication for Li-Ion and Li-

Polymer battery packs. The 1-series cell capability

includes parallel cells for increased capacity.

compatible

and

HDQ

one-wire

interfaces

and

includes several key features that can help facilitate

accurate

gas

gauging

applications.

Integrated

temperature sense functions (internal and external

options) enable system and battery temperature

measurements.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

BQ27Z561-R1

DSBGA (12)

1.72 mm × 2.09 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic