uPI Semiconductor Corporation today announced the release of the uP8328 Secondary Protection IC, a highly reliable protection solution designed for 2- to 5-series Li-Ion and Li-Polymer battery packs. The uP8328 integrates a high-accuracy voltage detection circuit, programmable delay timing, and an on-chip voltage regulator, making it a comprehensive safety component for medium- to high-voltage battery systems. Engineered for safety-critical and power-intensive applications—such as power tools, mobility, energy storage, industrial equipment, and long-standby IoT systems—the uP8328 delivers exceptional precision, robust protection, and ultra-low power consumption. Key Features: High-Accuracy Overcharge Voltage Detection Detection range: 50 V to 5.0 V (50 mV steps) Accuracy: ±20 mV at 25°C , ±25 mV from 0°C to 60°C Built-In Delay Timing (No External Capacitor Required) Overcharge delay options: 2 s / 4 s / 6 s Shutdown output delay options: 2 s / 4 s / 6 s High Voltage Tolerance for Multi-Cell Designs Absolute maximum rating: 36 V Operating voltage range: 5 V to 30 V Ultra-Low Current Consumption At 3.8 V per cell: 0 μA max At 2.0 V per cell: 7 μA max Integrated LDO Voltage Regulator Output options: 5 V / 3.0 V / 3.3 V (±2% accuracy) Maximum output current: 10 mA Built-in short-circuit protection Reverse current blocking Ideal for powering RTCs or low-power MCUs Filter-Less Technology® Stable protection performance under noise Reduces MLCC requirements (pad reservation recommended) Safe Cell Connection Logic (2–5 Series) Built-in Power-On Reset Connection-order protection to prevent incorrect startup Target Applications: The uP8328 is ideal for: 2–5 cell Li-Ion/Li-Polymer battery packs Power tools and outdoor equipment E-bikes, e-scooters, and light mobility devices Industrial backup systems and UPS Long-standby IoT and embedded systems Battery packs requiring onboard LDO power for RTC/MCU support Its integrated LDO architecture is particularly beneficial for applications requiring a stable low-voltage rail from the same battery pack. Package & Availability: WDFN 2×2-8L compact package Samples available now Mass-production schedule available through uPI sales representatives RoHS compliant and environmentally friendly With the release of the uP8328 , uPI strengthens its position in multi-cell Li-ion safety solutions. By combining precise voltage detection, configurable timing, and an integrated LDO, we enable customers to reduce BOM complexity while enhancing protection and system reliability.