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Texas Instruments BQ7790512PW — Discrete Semiconductors

BQ7790512PW Battery Protection IC, 3-5 Cell Li-Ion, 20-TSSOP

MPNBQ7790512PW
End of Life

Texas Instruments BQ7790512PW, Battery Protection IC, 3 ~ 5 Cells, Lithium Ion, Over Current / Over Temperature / Over/Under Voltage / Short Circuit, -40°C ~ 85°C, 20-TSSOP, Tube.

$1.84Ref. price · indicative, final on quote
Texas Instruments BQ7790512PW datasheet (PDF)
Packaging20-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ7790512PW specifications
ParameterValue
MountingSurface Mount
Operating temperature-40°C ~ 85°C (TA)
PackageTube
FunctionBattery Protection
Case20-TSSOP (0.173\", 4.40mm Width)
Number of cells3 ~ 5
Fault protectionOver Current, Over Temperature, Over/Under Voltage, Short Circuit
Battery chemistryLithium Ion

Product details

Battery protection for 3–5 series Li-Ion packs

The Texas Instruments BQ7790512PW is a battery protection IC designed for 3 to 5 series-connected lithium-ion cells. It integrates overcurrent, overtemperature, overvoltage, undervoltage, and short-circuit fault protection into a single 20-TSSOP package.

The 3 to 5 cell range is the primary fit parameter. The overcurrent and short-circuit detection thresholds are set by external sense resistors.

The TSSOP body is moisture-sensitive. Surface-mount assembly; no through-hole variant exists for this function.

Frequently asked questions

Does BQ7790512PW support 4 cells?

Yes, the BQ7790512PW supports 3 to 5 series cells, so a 4S configuration is within its rated range.

What is the BQ7790512PW equivalent?

The BQ7790512PW is a specific trim variant of the BQ77905 family. A direct pin-compatible equivalent from another manufacturer is not listed. For a functional alternative with a different feature set, the BQ2084DBT-V143 is a battery monitor IC for 2 to 4 cells with SMBus interface, but it is a monitor, not a standalone protector — it requires a host controller to act on faults.