BQ29700DSET

Introduction to BQ29700DSET
The BQ29700DSET is TI’s stand-alone protection IC for a single-cell Li‑ion/Li‑polymer battery pack. It does not require a microcontroller and uses external CHG and DSG MOSFETs to disconnect the cell from the pack during faults.
Key functions:
- Overcharge and overdischarge protection with automatic restart
- Overcurrent/short-circuit protection with fast fault response
- Temperature/thermal protection via integrated sensing
- Drives external MOSFETs (CHG/DSG) to protect the pack
- Low quiescent current suitable for portable devices
- Self-contained safeguards for 1S packs
Package/variant:
- DSET denotes a specific TI packaging/variant; check the datasheet for exact pinout, timing, and electrical specs.
Typical applications:
- 1S Li‑ion/Li‑poly battery packs in mobile devices, wearables, and compact tools.
Note: Always consult the TI datasheet for precise electrical specs and application notes.

Here are the typical features of the bq29700DSET (Li-ion single-cell protector with MOSFET driver):
- 1-cell Li‑ion/Li‑polymer pack protector plus dual MOSFET driver for charge and discharge paths
- Overcharge protection with latch and auto-retry
- Overdischarge protection with latch and auto-recharge
- Overcurrent/short-circuit protection with fast trip and auto-retry
- Temperature monitoring via external NTC input for thermal protection
- External MOSFET gate drive to disconnect charger/load as needed
- Fault/status reporting to host microcontroller
- Automatic protection reset and safe restart after fault
- Low quiescent current and fast protection response
- Suitable for compact battery packs; available in DSET package (8-pin style)
Note: Always refer to the datasheet for exact electrical specs and pinout.

- Pin count: 8 pins (SOP-8/TSSOP-8 package variants, R-DS variant DSET).
- Function: Li‑ion/Li‑polymer battery pack protection IC. It monitors pack voltage and current (and temperature via external thermistor) and drives external MOSFETs to disconnect the pack on fault conditions (overcharge, overdischarge, overcurrent/short-circuit) and provides protection/status signaling.

- Manufacturer: Texas Instruments (TI).
- What kind of company: An American multinational semiconductor company that designs, manufactures, and markets analog and embedded processing integrated circuits; one of the world’s largest semiconductor companies, headquartered in Dallas, Texas.

Application areas: single-cell Li-ion/Li-polymer battery packs used in portable consumer electronics and compact power sources, including wearables, handheld instruments, wireless peripherals, toys, cordless tools, medical devices, and small UPS/power banks; provides protection against overcharge, overdischarge, overcurrent and short-circuit with auto-retry/wake features.

The BQ29700DSET uses an 8-pin D‑package, i.e., an 8‑pin SOIC (D‑package) variant (Pb-free options available).