MAX17851AUP/V+T

MAX17851AUP/V+T is an automotive-grade high-voltage battery-management IC from Maxim Integrated (now Analog Devices). It serves as a BMS front-end/controller for large Li‑ion packs, handling cell sensing, protection, and balancing under the control of a host MCU.
Key features (typical):
- Multi-channel cell-voltage and temperature sensing
- Pack/current measurement and balancing control
- Fault protection (over/under-voltage, overcurrent, thermal, shorts)
- Serial interface to a host MCU (usually SPI/I2C-like)
- Diagnostics, watchdog, and fault-latching
- Optional isolation to the host and rugged automotive temp range
The AUP/V+T suffixes denote specific packaging and automotive-grade variants (temperature range and reel/packaging options). For exact specifications (channel count, voltage range, balancing method, timing, and pinout), refer to the MAX17851A datasheet and the family user guide. If you want, I can summarize the datasheet once you provide it.

Equivalent products (multi-cell battery monitor/protection ICs) from other vendors include:
- TI: BQ76920, BQ76930, BQ76940
- Analog Devices: LTC6811/LTC6812/LTC6813 family
- Renesas: ISL94202/ISL94204/ISL94207
Note: exact parity depends on cell count, protection vs monitoring features, communication interface, and packaging—verify datasheets for pinout and specs.

Here are the key features of MAX17851AUP/V+T (high-level, concise):
- Automotive/energy-storage BMS IC: monitor, protect, and gauge multi-cell packs
- High-voltage cell sensing: precise measurement across many series cells
- On-chip gas gauge: coulomb counting with state-of-charge estimation
- Temperature sensing: NTC input with thermal protection
- Cell balancing: passive balancing with programmable balance current
- Protective functions: overvoltage, undervoltage, overcurrent/short-circuit, over/under temperature
- Diagnostics and faults: status flags, fault latch, configurable alarms
- Communications: SPI interface to host MCU for control and data readout
- Programmable registers: thresholds, balance current, timing, and gauge parameters
- Power management: low quiescent current, wake/sleep modes
- Package options: MAX17851AUP and V+T variants (AUP/Tape & Reel)
Notes: Suited for automotive/EV battery packs and energy storage, combines cell monitoring, protection, balancing, and gauging in one device with a serial host interface.

Pin count: 56 pins (AUP package variant; V+T is RoHS/lead-free option).
Function: Automotive-grade high-voltage motor-control/gate-driver IC (three-phase BLDC motor drive with integrated sensing, control interface ( SPI/MCU), and protection features).

- Manufacturer: Maxim Integrated (now part of Analog Devices, Inc.)
- Company type: A fabless semiconductor company that designs and manufactures analog, mixed-signal, and power-management ICs for automotive, industrial, communications, and consumer electronics.

Applications areas of MAX17851AUP/V+T:
- Automotive BMS for EV/HEV/PHEV traction battery packs
- High‑voltage energy storage systems for renewables (solar/wind) and microgrids
- Industrial and telecom backup power battery packs (UPS)
- Mobile, robotics and power-tools requiring multi‑cell Li‑ion packs

It uses a QFN (Quad Flat No-Lead) package with an exposed pad. The +T suffix indicates Tape & Reel packaging. For the exact pin count, refer to the datasheet.