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Battery Switcher Charger Product Overview

Battery switcher chargers are essential components in modern power systems, enabling efficient, safe, and reliable management of battery packs across various architectures. TrigoPi’s new product line addresses the increasing complexity of battery systems by offering advanced switching, charging, path-through, and protection features suitable for parallel architectures like 2P, 3P, 4P and serial architectures like 2S, 3S, 4S. This product is designed for engineers and system integrators seeking robust battery management solutions that optimize performance and longevity.

By integrating exclusive options for switching and charging with comprehensive protections, these products support a wide range of applications from portable electronics to industrial power systems, ensuring seamless operation and safety.

Technical Highlights

The core of TrigoPi’s battery switcher charger is an ultra-low-power, highly secure ARM Cortex M23 microcontroller from Microchip, which runs embedded algorithms for battery management, monitoring, switching, and charging. This microcontroller is complemented by electronics featuring super low-resistance, fast-switching MOSFETs, ideal diodes, ESD protections, and reverse polarity safeguards, ensuring high efficiency and safety.

Some architectures utilize external switcher and monitor ICs such as the Analog Devices LTC1760 to extend functionality and improve control. The back side of the circuit board houses all MOSFETs and switching electronics, optimized for thermal management to maintain reliability during high current operation.

The design supports a battery voltage range from 3.7 V to +22.5 V and operates reliably in extreme temperatures from -40°C to +100°C. It withstands harsh environmental conditions including humidity, vibration, and electromagnetic interference. The system supports discharge currents up to 15 A with sub-microsecond switching speeds and maintains ultra-low power consumption: less than 100 μA active and under 100 nA in sleep mode.

Integration & Applications

TrigoPi’s design supports multiple battery pack configurations. For example, it can handle a 4P parallel configuration of Panasonic NCR18650G lithium-ion cells rated at 3.7 V and 3600 mAh each. This configuration delivers 3.7 V at 14,800 mAh total capacity, significantly enhancing energy storage without increasing voltage (see Figure 1).

The conceptual schematic of the 4P design illustrates the switching and charging topology used to manage the parallel cells efficiently (see Figure 2).

Additionally, the product supports 2B architecture SMBUS batteries such as Inspired Energy NH2504 rated at 14.4 V and 6800 mAh. This enables batteries to support each other via coordinated switching and charging (see Figure 3).

The schematic of the 2B design shows the switching and monitoring approach for SMBUS battery packs (see Figure 4).

TrigoPi’s battery management monitor software provides system engineers with real-time monitoring of voltage, current, state of health, state of charge, and charge cycles, facilitating system optimization and diagnostics (see Figure 6).

Variants & Support

The modular design of this product line supports diverse applications from portable electronics to industrial power systems. The back side of the circuit board, containing MOSFETs and switching electronics, is engineered for efficient thermal dissipation and system reliability (see Figure 5).

TrigoPi provides design-in support, reference designs, and qualification services to ensure smooth integration and reliable deployment.

Key Benefits

• Supports battery voltage from 3.7 V up to +22.5 V.
• Operates reliably across extreme temperatures (-40°C to +100°C).
• Designed for harsh environments including humidity, vibration, and EMC.
• Supports discharge currents up to 15 A with ultra-fast switching in sub-microseconds.
• Comprehensive battery monitoring: voltage, current, state of health, state of charge, and charge cycles.
• Consumes less than 100 μA active, under 100 nA in sleep mode.
• Compact form factor easily integrated into small battery packs.

Implementation Tips

• Utilize the back side MOSFET layout for effective thermal management; consider additional cooling for high current applications.
• Leverage embedded management algorithms and TrigoPi’s monitoring software to tailor battery management to your application.
• For complex architectures, integrate external switcher/monitor ICs such as Analog Devices LTC1760 for enhanced control.
• Protect against environmental factors with appropriate enclosure designs or coatings to ensure long-term reliability.

Safety & Reliability Notes

Safety is a fundamental design principle. Multiple layers of protection including ESD safeguards, reverse polarity prevention, and low-resistance switching elements minimize risk and thermal stress. The ARM Cortex M23 microcontroller ensures secure and stable firmware execution for reliable battery management. System-level testing is recommended to tailor protections to specific battery chemistries and operating conditions.

At TrigoPi, we love testing the edges of battery management technology—it’s the kind of challenge that keeps our engineers awake at night, in a good way. We refined these designs through real projects—reach out if you’d like to see how they apply to your case.

If you are designing advanced battery packs or require dependable switching and charging solutions, contact us for datasheets, design reviews, and evaluation kits to explore how TrigoPi’s expertise can accelerate your development.