Battery over-voltage protection(Min/Max)(V) : 4.275 and 4.325
Adjustable Threshold:
NO
Analog IC - Other Type:
SECONDARY BATTERY PROTECTOR
Input Voltage-Max:
28 V
JESD-30 Code:
S-PDSO-N8
JESD-609 Code:
e4
Length:
3 mm
Moisture Sensitivity Level:
2
Number of Channels:
1
Number of Functions:
1
Number of Terminals:
8
Operating Temperature-Max:
85 °C
Operating Temperature-Min:
-40 °C
Package Body Material:
PLASTIC/EPOXY
Package Code:
HVSON
Package Shape:
SQUARE
Package Style:
SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Cel):
260
Qualification Status:
Not Qualified
Seated Height-Max:
1 mm
Supply Voltage-Max (Vsup):
25 V
Supply Voltage-Min (Vsup):
4 V
Supply Voltage-Nom (Vsup):
17 V
Surface Mount:
YES
Temperature Grade:
INDUSTRIAL
Terminal Finish:
Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal Form:
NO LEAD
Terminal Pitch:
0.65 mm
Terminal Position:
DUAL
Time@Peak Reflow Temperature-Max (s):
30
Width:
3 mm
BQ29449DRBT Frequently Asked Questions (FAQs)
Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow the guidelines in the TI application note 'Battery Management System (BMS) PCB Layout Guidelines' (SLUA995) for optimal performance and to minimize noise and EMI.
The BQ29449DRBT is designed to support various battery chemistries, including Li-ion, Li-polymer, and Li-iron phosphate. To configure the device for a specific chemistry, refer to the datasheet and application notes, which provide guidance on setting the correct voltage and current limits, as well as configuring the device's protection features.
The BQ29449DRBT is designed to support up to 16 series-connected cells. However, the maximum number of cells that can be connected in series depends on the specific application and the voltage rating of the device. It's recommended to consult the datasheet and application notes for guidance on configuring the device for a specific number of series-connected cells.
The BQ29449DRBT uses a proprietary cell balancing algorithm that ensures equalization of cell voltages during charging and discharging. The device uses a combination of passive and active balancing techniques to maintain cell voltage balance. The specific balancing algorithm used is not publicly disclosed by Texas Instruments, but it's designed to provide optimal performance and reliability in battery management systems.
The BQ29449DRBT is designed to operate in a wide temperature range (-40°C to 125°C), but thermal management is still critical to ensure reliable operation. It's recommended to follow the thermal design guidelines in the datasheet and application notes, which provide guidance on thermal pad design, heat sinking, and airflow management to ensure optimal thermal performance.
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BQ29449DRBT 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.
