OVER VOLTAGE AND UNDER VOLTAGE THRESHOLD IS 4.25 AND 2.5V
Adjustable Threshold:
NO
Analog IC - Other Type:
BATTERY MONITOR/PROTECTOR
Input Voltage-Max:
25 V
JESD-30 Code:
R-PDSO-G20
JESD-609 Code:
e4
Length:
6.5 mm
Moisture Sensitivity Level:
2
Number of Channels:
5
Number of Functions:
1
Number of Terminals:
20
Operating Temperature-Max:
85 °C
Operating Temperature-Min:
-40 °C
Package Body Material:
PLASTIC/EPOXY
Package Code:
TSSOP
Package Shape:
RECTANGULAR
Package Style:
SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Cel):
260
Seated Height-Max:
1.2 mm
Supply Voltage-Max (Vsup):
25 V
Supply Voltage-Min (Vsup):
3 V
Supply Voltage-Nom (Vsup):
20 V
Surface Mount:
YES
Temperature Grade:
INDUSTRIAL
Terminal Finish:
Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal Form:
GULL WING
Terminal Pitch:
0.65 mm
Terminal Position:
DUAL
Threshold Voltage-Nom:
+4.25,2.5V
Time@Peak Reflow Temperature-Max (s):
30
Width:
4.4 mm
BQ7790509PW Frequently Asked Questions (FAQs)
Texas Instruments provides a recommended PCB layout in the datasheet, but it's essential to follow good design practices, such as keeping the sense lines short and away from noise sources, using a solid ground plane, and minimizing vias and thermal relief connections.
Calibration involves setting the gauge's full-scale capacity and empty-scale capacity. TI provides a calibration guide in the datasheet, which involves measuring the battery's capacity and adjusting the gauge's settings accordingly. You can also use TI's Fuel Gauge Calibration Tool software to simplify the process.
The BQ7790509PW has an accuracy of ±1% over the entire operating range. To handle battery aging, the fuel gauge uses a combination of coulomb counting and voltage-based state-of-charge (SOC) estimation. The device also has a built-in aging compensation mechanism to adjust for capacity loss over time.
Yes, the BQ7790509PW is designed to work with various battery chemistries, including lithium-ion, lithium-polymer, and nickel-metal hydride. However, you may need to adjust the gauge's settings and calibration for optimal performance with different chemistries.
The BQ7790509PW has a built-in over-discharge protection feature that prevents the battery from being deeply discharged, which can cause damage. The device can be configured to trigger an alert or shutdown when the battery voltage falls below a certain threshold.
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BQ7790509PW 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.
