Industrial Electronics

Littelfuse releases innovative eFuse Super Capacitor Protection ICs for backup power charging applications

11 December 2023

Littelfuse, Inc. reveals the latest addition to the eFuse Protection Integrated Circuits (ICs) product line of versatile circuit protection devices, the LS0502SCD33. This pioneering innovation marks a significant milestone in the industry, providing the eFuse Super Capacitor Protection IC, a cutting-edge solution designed specifically for backup power charging applications in harsh environments.

In many applications where backup power is crucial, the narrow temperature range of lithium-ion batteries limits their use. To address this challenge, Littelfuse developed the LS0502SCD33, a supercapacitor-based solution that offers a wide operating temperature range and high power/energy density, ensuring a safeSource: Littelfuse, Inc.Source: Littelfuse, Inc. and compact alternative.

One of the key differentiators of the LS0502SCD33 is its ability to handle high operating voltages (greater than 3 V) without the need for complex power management systems. The LS0502SCD33 safeguards the system from potential damage by integrating input overvoltage and current protection, providing designers with a flexible, integrated, and compact storage capacitor or capacitor bank backup solution. Furthermore, the LS0502SCD33 features an ideal diode for reverse blocking when the input voltage is lost, enhancing its reliability and efficiency.

The LS0502SCD33 eFuse Protection ICs are ideal for a wide range of supercapacitor applications, including:

  • Dash cameras (automotive DVR),
  • Smart meters,
  • Internet of things (IoT) devices,
  • Handheld industrial tools, and
  • Portable gadgets with detachable batteries.

The LS0502SCD33 eFuse’s competitive advantage is its support for a wide range of protection features, including over-current protection (OCP) and over-voltage protection (OVP). Moreover, it boasts lower power consumption and supports active cell balance, setting it apart from other solutions available.

Apart from its integrated protection features, the LS0502SCD33 offers several benefits. Manufacturers can reduce repair expenses with enhanced reliability and an extended life cycle. Additionally, the LS0502SCD33 enables longer battery life while reducing overall product size with its space-saving footprint, a crucial advantage for applications requiring extended standby time.

How it works
The LS0502SCD33 is a holistic solution for systems requiring a backup storage capacitor by integrating input overvoltage, OCP, a reverse blocking switch and supercapacitor charging control circuits. With a built-in cell balance safeguarding two-cell supercapacitor systems, the circuit draws a mere 2.5 μA upon the full charge of the storage element. Additionally, it signals when the input supply is detached, enabling the primary system to respond promptly.

The eFuse Protection ICs are available in tape and reel format in quantities of 5,000. Place sample requests through authorized Littelfuse distributors worldwide.

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