CH591
Ultra-low-power BLE 5.1 SoC optimized for battery-powered sensors with multi-year operation
Product Overview
Description
CH591 is an ultra-low-power BLE SoC designed for battery-powered applications requiring multi-year operation on coin cells.
With sub-microamp sleep currents and efficient BLE 5.1 operation, this chip enables IoT sensors that run for years on small batteries.
The chip includes 256KB Flash, 32KB RAM, and optimized power management for beacon and sensor applications.
Product Series
CH
Primary Application
Battery sensors
Key Features
- Ultra-low power consumption
- Sub-microamp sleep current
- BLE 5.1 long-range support
- 256KB Flash, 32KB RAM
- Compact WLCSP package
- Efficient power management
- Multiple sleep modes
- Coin cell battery optimized
Specifications
| Bluetooth | BLE 5.1 |
|---|---|
| Core | RISC-V3A |
| Flash | 256KB |
| RAM | 32KB |
| TX Power | +4dBm max |
| Sensitivity | -95dBm |
| TX Current | 4.5mA |
| RX Current | 4mA |
| Sleep Current | 0.5uA |
| Package | QFN32, WLCSP |
| Temperature Range | -40°C to +85°C |
Applications
Battery sensors
Battery and charging management
Long-life beacons
Electronic system design
Wearable devices
Electronic system design
Environmental monitors
Electronic system design
Smart agriculture
Electronic system design
Remote sensors
Sensor signal conditioning
FAE Expert Insights
"CH591 is specifically designed for ultra-long battery life applications. The 0.5uA sleep current is exceptional - I've designed beacons that run 5+ years on CR2032 cells using this chip. The BLE 5.1 long-range mode extends coverage while maintaining low power. The WLCSP package is tiny - perfect for wearables and compact sensors. For battery-powered IoT, this is the chip I recommend first. Just be aware that the smaller Flash (256KB) limits application complexity compared to CH582."
Sub-microamp sleep current for multi-year battery life
— Sarah Chen, BeiLuo