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BQ29700DSET

Name: BQ29700DSET
Rating: 4.7 (12 reviews)

IC BATT PROT LI-ION 1CELL 6WSON

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Mfr。パート #BQ29700DSET
パッケージ WSON-6
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仕様

Package	Tape & Reel (TR),Cut Tape (CT)
ProductStatus	Active
Function	Battery Protection
BatteryChemistry	Lithium Ion/Polymer
NumberofCells	1
FaultProtection	Over Current, Over/Under Voltage, Short Circuit
OperatingTemperature	-40°C ~ 85°C (TA)
MountingType	Surface Mount
Package/Case	6-WFDFN

概要

Description

BQ29700DSET is TI’s protection IC for a single-cell Li‑ion/Li‑polymer pack. It monitors cell voltage, current, and temperature and drives two back-to-back external MOSFETs to protect the cell from faults. If an overcharge, overdischarge, or overcurrent/short is detected, it disconnects the pack and then auto-retries after the fault clears (hiccup mode).
The DSET version adds a DSET pin to program the discharge current limit with an external resistor, allowing you to tailor protection to the specific pack.
Typical applications: 1‑cell battery packs in portable electronics, power tools, and accessories needing safe Li‑ion protection.
Key features: over/under-voltage protection, overcurrent/short‑circuit protection, back-to-back MOSFET control, auto-retry, low quiescent current, and a small package (SOT‑23/6). Often used with an external NTC for temperature sensing and the recommended MOSFET arrangement as per the datasheet.

Features

Key features of the bq29700DSET (1S Li‑ion/Li‑polymer battery protector):
- Protects a single cell with two back‑to‑back external MOSFETs to fully isolate the pack during faults (charge and discharge paths).
- Protection functions: overcharge (OCD), overdischarge (ODP), overcurrent/short‑circuit (OCP/SCP), and overtemperature.
- Uses RSENSE for current measurement and supports a thermistor input for temperature monitoring.
- Independent control of charge and discharge directions with fast OCP/SCP protection and latch behavior.
- Auto‑retry after a fault and fault/Status signaling for host monitoring.
- Low quiescent current for long‑life standby in battery packs.
- Designed for convenient 1S protection with minimal external components.
- Suitable voltage range for a typical 1S Li‑ion cell (roughly in the 2.7–4.3 V region, depending on the exact cell chemistry and setup).
Note: exact voltage thresholds, timing, and pinout should be confirmed in the datasheet for your package variant.

Package

An 8-pin surface-mount package: SOIC (D-package).

Pinout

- Pin count: 8 pins (8-pin package such as SOP-8/UW).
- Function: A Li-Ion/Li-polymer battery protection IC. It monitors cell voltage and current and controls two external MOSFETs to protect against overcharge, overdischarge, overcurrent, and short-circuit conditions. The DSET variant uses the DSET pin to program the discharge current limit via an external resistor.

Manufacturer

- Manufacturer: Texas Instruments (TI).
- What kind of company: An American multinational semiconductor company that designs and manufactures analog and embedded processing integrated circuits (ICs) and related semiconductor products.

Application

Single-cell Li‑ion/Li‑polymer battery protection IC.
Used in protected packs for portable consumer electronics (cell phones, cameras, MP3 players, PDAs, handheld gaming).
Also suitable for USB power banks and compact medical/portable devices.
Provides overcharge, overdischarge, and overcurrent/short‑circuit protection with integrated FETs and status outputs for safe operation.

Equivalent

There’s no published exact cross-reference for BQ29700DSET. It’s TI’s standalone Li-ion protection IC requiring external FETs. Closest TI options are other members of the BQ2970x/BQ29700 family. For third‑party equivalents, consider Seiko Instruments S‑825x/S‑826x series or On Semiconductor NCP safety‑protector ICs, and other 1–2 cell protector devices. Use TI’s Cross Reference tool or distributor databases to locate current equivalents.