Renesas' smart power meter solution is integrated with 4G communication and an electrical double layer capacitor (EDLC) that achieves a smart control and always-on system. The ISL85403 buck-boost regulator achieves self-cycling EDLC backup and could theoretically discharge the EDLC voltage as low as 0.1 V. This greatly improves the EDLC’s efficiency and reduces the system cost. Additionally, the RL78/L13 microcontroller (MCU) is ideal for measurement devices and power meters with ultra-low power and a built-in segment LCD driver.
The EDLC is a supercapacitor with features such as short charging time, high power density, long lifecycles, good temperature performance, and environmental protection. EDLCs can be used to replace traditional batteries (with defects such as electrolyte leakage) as a backup power supply. The EDLC’s power can be used for data backup, wireless communication, and other functions, when the power is turned off for a few minutes.
Features
- Ideal solution for battery and EDLC based always-on systems
- RL78/L13 MCU
- Low-cost 16-bit RL78/L13 MCU with ultra-low power and a segment LCD driver
- Low power consumption
- Standard LCD MCUs suitable for the LCD of home appliances or measurement devices
- 64-pin/80-pin, 16 K to 128 K ROM, and 1 K to 8 K RAM
- Built-in LCD driver up to 376 segments
- ISL85403 buck-boost regulator
- High-efficiency boost-buck converter to support fully supercap charge and discharge
- Wide input voltage range: 3 V to 40 V
- Supports discharge supercap voltage to lower than 0.2 V
- RJK03M5DNS MOSFET
- N-channel single power MOSFET 30 V 25 A 6.3 mΩ HWSON-8 (3.3 mm x 3.3 mm)
- ISL88002 voltage supervisor
- Ultra-low power 3 Ld voltage supervisors
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Renesas' smart power meter solution is integrated with 4G communication and an electrical double layer capacitor (EDLC) that achieves a smart control and always-on system. The ISL85403 buck-boost regulator achieves self-cycling EDLC backup and could theoretically discharge the EDLC voltage as low as 0.1 V. This greatly improves the EDLC’s efficiency and reduces the system cost. Additionally, the RL78/L13 microcontroller (MCU) is ideal for measurement devices and power meters with ultra-low power and a built-in segment LCD driver.
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