Functional Safety-Compliant Automotive 18S Battery Monitor With Current Sense
Country Of Origin:
Philippines
ECCN Code:
EAR99
HTS Code:
8542.39.00.90
Manufacturer:
Texas Instruments
YTEOL:
15
Adjustable Threshold:
YES
Analog IC - Other Type:
BATTERY MONITOR
Input Voltage-Max:
90 V
JESD-30 Code:
S-PQFP-G64
JESD-609 Code:
e4
Length:
10 mm
Moisture Sensitivity Level:
3
Number of Channels:
18
Number of Functions:
1
Number of Terminals:
64
Operating Temperature-Max:
125 °C
Operating Temperature-Min:
-40 °C
Package Body Material:
PLASTIC/EPOXY
Package Code:
HTFQFP
Package Equivalence Code:
FL64,.4,20
Package Shape:
SQUARE
Package Style:
FLATPACK, HEAT SINK/SLUG, THIN PROFILE, FINE PITCH
Peak Reflow Temperature (Cel):
260
Screening Level:
AEC-Q100
Seated Height-Max:
1.2 mm
Surface Mount:
YES
Terminal Finish:
Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal Form:
GULL WING
Terminal Pitch:
0.5 mm
Terminal Position:
QUAD
Time@Peak Reflow Temperature-Max (s):
30
Width:
10 mm
BQ79758QPAPRQ1 Frequently Asked Questions (FAQs)
Texas Instruments provides a recommended PCB layout in the datasheet, but it's essential to follow good PCB design practices, such as keeping the analog and digital grounds separate, using a solid ground plane, and minimizing noise coupling. Additionally, ensure the layout is symmetrical and balanced to reduce electromagnetic interference (EMI).
The BQ79758QPAPRQ1 is designed to support various battery chemistries, including Li-ion, Li-polymer, and Lead-Acid. To configure the device for a specific chemistry, refer to the datasheet's 'Battery Chemistry Configuration' section, which provides guidance on setting the appropriate voltage and current thresholds, as well as the charge/discharge profiles.
The BQ79758QPAPRQ1 can handle up to 10A of charging current, but this may vary depending on the specific application and thermal design. It's essential to ensure the device is properly heat-sinked and the PCB is designed to handle the maximum expected current.
The BQ79758QPAPRQ1 has built-in OVP and UVP features, which can be configured using the device's registers. Refer to the datasheet's 'Overvoltage Protection' and 'Undervoltage Protection' sections for guidance on setting the appropriate voltage thresholds and response times.
The BATFET pin is used to control an external FET that disconnects the battery from the system during shutdown or fault conditions. This pin is active-low, meaning it should be pulled low to turn off the FET. The BATFET pin can be used to implement additional safety features, such as battery isolation during charging or fault conditions.
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BQ79758QPAPRQ1 Overview
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
