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BQ7790509PWR

Name: BQ7790509PWR
Rating: 4.7 (12 reviews)

IC BATT PROT LI-ION 3-5C 20TSSOP

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仕様

Part Status	Active
Base Product Number	BQ7790509
Function	Battery Protection
Battery Chemistry	Lithium Ion
Number of Cells	3 ~ 5
Fault Protection	Over Current, Over Temperature, Over/Under Voltage, Short Circuit
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package	20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package	20-TSSOP
Packaging	Bulk, Cut Tape (CT), Tape & Reel (TR)

概要

Description

BQ7790509PWR is TI’s standalone protection IC for Li-ion/Li-poly battery packs with 5–9 cells (up to ~40 V). It continuously monitors individual cell voltages, pack current, and temperature, and it drives external MOSFETs to disconnect the pack if faults are detected. Key protections include overvoltage, undervoltage, overcurrent/short-circuit, and overtemperature, plus features like pre-charge and reverse-current protection with latch/auto-recovery behavior. It’s a “powerpad” (PWR) package that requires external protection FETs, a sense resistor, and an NTC sensor. No MCU is required; it is designed to be a stand-alone battery protector in multi-cell packs for devices such as consumer electronics, power tools, and EV-related packs. For details on pins, thresholds, and application circuits, refer to the datasheet and TI application notes.

Features

Here are the key features of bq7790509PWR (PowerPAD version):
- Multi-cell Li-ion/Li-poly protection for 5–9 series packs (up to ~38–42 V)
- Protection functions: overcharge, overdischarge, overcurrent, short-circuit
- Reverse-current/charger protection
- Dual MOSFET gate drive to disconnect the pack on fault (CHG/DSG)
- Cell-voltage sensing across up to 9 cells (S1–S9 inputs)
- Temperature monitoring via external NTC and over/under temperature protection
- Fault latch with auto-retry; POR/reset and wake-from-charge behavior
- Status/alert outputs and fault reporting (CHG/DSG indicators)
- Timing delays and hiccup protection to minimize nuisance trips
- Low quiescent current and ESD protection
- PowerPAD/THERMAL pad package for enhanced heat dissipation
Note: For exact pinout, voltage ranges, and programmable thresholds, please consult the official datasheet.

Package

PowerPAD package (thermally enhanced exposed-pad, TI QFN-style package).

Pinout

- Pin count: 28 pins (PowerPAD/PWR variant in a QFN/TQFN-style package).
- Function: bq7790509PWR is a 9-series Li‑ion battery protection IC. It monitors cell voltages, pack current (via sense), and temperature, and drives external protection FETs to provide overcharge, overdischarge, overcurrent/short‑circuit protection, plus status/diagnostic outputs.

Manufacturer

- Manufacturer: Texas Instruments (TI).
- What kind of company: TI is a US multinational semiconductor company that designs and manufactures analog, mixed-signal, and embedded processing ICs and other semiconductor products for electronics and power management.

Application

- Function: Battery protection and cell-level monitoring for Li-ion/Li-poly multi-cell packs; provides OVP/UVP, OCP/SCP, temperature sensing, and pack FET drive.
- Applications: Battery management systems for consumer electronics, cordless tools, e-bikes/e-scooters, energy storage systems, telecom backup, and solar storage packs.

Equivalent

There isn’t a direct one-for-one equivalent from other vendors. BQ7790509PWR is TI’s 9‑cell Li‑ion battery-pack protection IC in the BQ7790x family. For a near substitute, use another TI device in the same family with identical pinout/ratings or use TI’s cross-reference tool. If sourcing outside TI, look for 9S Li‑ion pack protection ICs and match voltage, current, and protection features.