Developing Next-Gen Battery Management Systems to Power The Future.
CRX Microtech is an innovative, US-based, Fabless Semiconductor startup focused on providing a complete portfolio of Battery Management solutions.
- In 2023, the parent company was established in Chengdu — Chengdu Churui Microelectronics Technology Co., Ltd. an office was also set up in Shanghai.
- In 2024, a wholly-owned subsidiary was founded in Silicon Valley.
- The company's core technical team originates from Silicon Valley, the U.S., with over 20 employees currently. It brings together excellent global chip design teams, including 4 PhD holders mainly from Maxim (Maxim Integrated, acquired by ADI in 2021), TI, etc., who have extensive experience in BMS chip R&D. They have developed multiple widely used BMS chips in the industry, with an average of over 20 years of experience in the chip industry. The company integrates high-quality R&D and manufacturing resources globally (especially in Silicon Valley) and is committed to building a leading chip technology company for China's new energy industry.
CRX2301Axx Protector for 1-Series Li-Battery Cell Packs
Features
- High-accuracy current monitoring through low-side external sense resistor, down to 1 mΩ
- High-accuracy current monitoring through low-side external sense resistor, down to 1 mΩ
- Protects from overvoltage (OVP), undervoltage (UVP), overcurrent in charge direction (OCC), two overcurrent in discharge thresholds (OCD1 and OCD2), short-circuit in discharge (SCD), 0-V charging (optional)
- CRX Microtech factory trim options for each protection and recovery threshold and type (hysteresis, latching, load/charger removal/attach)
- Power modes:
•NORMAL mode: 2.5 µA (typical), 4.0 µA (max) at 25 °C
•STANDBY mode: 0.3 µA (typical), 0.8 µA (max) at 25 °C
- Package:
•6-pin SSON
•1.4 mm x 1.8 mm x 0.4 mm max
•Operating ambient temperature range: -40 °C~85 °C
Applications
Single-cell portable equipment batteries:- Smartphones
- Tablets
- Point-of-sale terminals
- Harm reduction smoking devices
Description
The CRX2301Axx is a protection IC for single-cell Li-ion battery packs to protect against overcharge, overdischarge, overcurrent, and short-circuit events. By monitoring battery voltage and the voltage across a current shunt resistor (typically 1 mΩ) in the lowside path it can determine whether to block charge or discharge current and disable the corresponding charge or discharge NFET (also in the low-side path). Different orderable part numbers are available with different thresholds and delays for voltage and current protection and recovery. An additional option is whether to block or allow 0-V charging.
CRX5116A Li-Battery Monitor and Protector for 5-Series Up to 16-Series Cell Packs
1、Features
- Monitors voltage, current, and temperature for packs using from 5-series to 16-series cells
- Protection can be triggered on voltage, temperature, current, and internal diagnostic events
- Dual ADCs
◦ Allows simultaneous current and voltage sampling
◦ High accuracy integrating coulomb counter with typical input offset error < 10 µV
◦ High accuracy cell voltage measurements with typical error < 10 mV - Wide-range current applications (±200 mV measurement range across sense resistor)
- Chemical fuse blow capability with detection for secondary protection fuse blow
- Internal and external cell balancing controlled by host
- Power mode options：
◦ ACTIVE mode: < 250 µA (typical)
◦ SLEEP mode options: < 50 µA (typical)
◦ SHUTDOWN mode: < 1 µA (typical) - High-voltage tolerant cell connect pins (85 V minimum)
- Control high-side NFET protection with integrated charge pump
- Control high-side PFET pre-charge and pre-discharge paths
- Robust to support random cell attach sequences during production
- Supports measurement and protection with one internal temperature sensor and nine external thermistors
◦ Thermistor pins can be used as general-purpose ADC inputs - Pin select between SPI or 400 kHz I2C interfaces
- Two 50 mA LDO outputs
- LDOs enabled and configured by pin selection between 1.8 V,2.5 V, 3.3 V, and 5 V
- Current-mode LED drivers for up to 5 LED display
- Digital I/O includes:
◦ ALRT pin to interrupt host
◦ /WAKE pin to exit SHUTDOWN mode
◦ RST_SD (reset/shutdown) pin
◦ DFET_DIS and CFET_DIS pins to quickly disable/enable FETs
2、Package Information
64-pin TQFP package (7 mm x 7 mm body size, 0.4 mm pin pitch)
3、Applications
- E-mobility and light electric vehicle battery packs
- Battery backup/UPS systems
- Portable equipment
4、Description
The CRX5116A device integrates the necessary measurement, protection, and cell balancing functions to form the core of a rechargeable lithium-based battery management system in packs containing from 5-series cells up to 16-series cells. Voltage and current measurements, along with the on-chip temperature measurement, can be used autonomously by the CRX5116A device for protection functions, while a host microcontroller can also access these measurements for implementation of additional protection and control, including cell balancing commands. Cell balancing FETs are integrated into the CRX5116A device, while external FETs can also be added for increased balancing current. The CRX5116A can directly overdrive the gates of high-side charge and discharge control FETs using an integrated charge pump. This datasheet details the electrical, mechanical, and highlevel functional characteristics of the device. Additional information about the registers, configuration, and detailed operation can be found in the CRX5116A Digital User Guide (DCX30F01).
