BQ4050 Datasheet, PDF (1/53 Pages) Texas Instruments – CEDV Gas Gauge and Protection Solution

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bq4050
SLUSC67A – MARCH 2016 – REVISED MARCH 2016
bq4050 CEDV Gas Gauge and Protection Solution for
1-Series to 4-Series Cell Li-Ion Battery Packs
1 Features
•1 High-Side Protection N-CH FET Drive Allows
Serial Bus Communication During Fault
Conditions
• Cell Balancing with Internal Bypass Optimizes
Battery Health
• Diagnostic Lifetime Data Monitor and Black Box
Recorder for Failure Analysis
• Full Array of Programmable Protection Features:
Voltage, Current, Temperature
• JEITA Charge Algorithms Support Smart Charging
• Analog Front End with Two Independent ADCs
– Simultaneous Current and Voltage Sampling
– High-Accuracy Coulomb Counter with Input
Offset Error < 1 μV (Typical)
• Supports Battery Trip Point (BTP) Function for
Windows^® Integration
• LED Display for State of Charge and Battery
Status Indication
• 100-KHz SMBus v1.1 Communications Interface
for Programming and Data Access with Alternate
400-KHz Mode
• SHA-1 Authentication Responder for Increased
Battery Pack Security
• Compact 32-pin VQFN Package (RSM)
3 Description
The Texas Instruments bq4050 device, incorporating
Compensated End-of-Discharge Voltage (CEDV)
technology, is a highly integrated, accurate, 1-series
to 4-series cell gas gauge and protection solution,
enabling autonomous charger control and cell
balancing.
The bq4050 device provides a fully integrated pack-
based solution with a flash programmable custom
reduced instruction-set CPU (RISC), safety
protection, and authentication for Li-Ion and Li-
Polymer battery packs.
The bq4050 gas gauge communicates via an SMBus-
compatible interface and combines an ultra-low
power, high-speed TI bqBMP processor, high-
accuracy analog measurement capabilities, integrated
flash memory, an array of peripheral and
communication ports, an N-CH FET drive, and a
SHA-1 Authentication transform responder into a
complete, high-performance battery management
solution.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq4050
VQFN (32)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of this data sheet.
2 Applications
• Notebook/Netbook PCs
• Medical and Test Equipment
• Portable Instrumentation
Simplified Schematic
PACK+
OUT
VDD
GND
VC3
Cell 3
VC2
Cell 2
VC1
Cell 1
BAT
VC4
VC3
LEDCNTLA
LEDCNTLB
LEDCNTLC
VC2
DISP
VC1
SMBD
SMBC
PBI
VSS SRP SRN TS1 TS2 TS3 TS4 BTP PRES
SMBD
SMBC
PRES
BTP
PACK–
1
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.