Overview
Description
Renesas' SLG7RN47748 DC/DC Boost & Buzzer Driver reference design highlights the versatility of HVPAK™ mixed-signal ICs by integrating a boost converter and piezo buzzer driver into one compact solution. It boosts a 3V coin cell to ~9.5V and drives a 1kHz buzzer for short alerts. Designed for efficiency, it draws ~8.5mA active and <50nA in sleep mode, featuring soft-start to limit inrush current and undervoltage protection for reliability. With its small footprint, low power, and robust performance, this design is ideal for battery-powered notification devices.
Features
- Integrated DC/DC boost converter and piezo buzzer driver in a single IC
- Boosts 3V to ~9.5V from a CR2032 coin cell battery
- Drives 1kHz piezo buzzer for short alert patterns
- Soft-start mechanism to reduce inrush current
- Undervoltage protection: Shuts down below ~2.5V, resumes above 2.7V
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Videos & Training
This video demonstrates the HVPAK SLG47105 DC/DC Boost and Buzzer Driver Demo Board. The demo board operates with a single 3V CR2032 battery. It consumes less than 50nA in sleep mode, ensuring long device operation on a single charge.