Power Management IC (PMIC) for Small Devices

Integrating essential power management functions for small devices into one chip, contributing to space-saving design Epson's Power Management IC (PMIC) for small devices, such as hearing aids and smart rings, integrates essential power management functions (battery charging, protection, and power supply) into one chip, greatly contributing to device space-saving. Additionally, Epson's proprietary wireless power supply technology enables stable wireless power transfer. The products include models that support both wireless charging and contact charging, as well as models specialized for contact charging, offering a lineup that can be selected based on various applications and needs.

Features of Epson PMIC

1. Stable wireless charging

   • Epson's unique wireless charging technology provides stable, contactless power transmission to devices.

2. High-efficiency Step-Down Charge Pump Circuit for main system IC

   • Equipped with a highly efficient step-down charge pump circuit for main system IC, boasting a conversion efficiency of over 90%(>2mA). This eliminates the need for additional power ICs for main system IC.

3. Comprehensive protection features

   • Includes protection circuits for overcharge/discharge, overcurrent, and overvoltage, ensuring reliable battery protection.

4. Flexible charging parameter settings

   • The built-in Flash ROM allows customizable charging parameters tailored to the battery, contributing to extended battery life.

Product Lineup

• Models Supporting Both Wireless and Contact Charging

  S1A00112B (For Receiver-Side Devices) S1A00121F (For Transmitter-Side Devices)		These models support both contact and wireless charging. Proprietary wireless power supply technology enables stable power transmission even with small coils. By combining the transmitter-side dedicated IC "S1A00121F" with the receiver-side dedicated IC "S1A00112B," efficient charging solutions and bidirectional data communication are made possible. S1A00112B Brief Sheet S1A00121F Brief Sheet
  S1A00210B (For Receiver-Side Devices) MP Orders Start:Nov.25		This PMIC features enhanced charging capabilities, constant voltage output, a step-down charge pump circuit compatible with heavy loads, low-power consumption LDO, and an SBD rectifier circuit. (For more details, refer to the bottom of the webpage.) S1A00210B Brief Sheet

• PMIC Specialized for Contact Charging

  S1A00114B (For Receiver- side Devices)		A model based on the S1A00112B, specialized for contact charging and designed to achieve lower costs. S1A00114B Brief Sheet
  S1A00115B (For Receiver-Side Devices)		A model based on the S1A00114B, providing the necessary functions for contact charging while achieving even lower costs and a more space-saving design. S1A00115B Brief Sheet

Function Comparison Chart

• For Receiver-Side

  Function		S1A00112B MP	S1A00114B MP	S1A00115B MP	S1A00210B Under Development
  Wireless Power Supply	Rectifier Circuit	✓	-	-	✓
  	Regulator	✓	-	-	✓
  	Load Modulation Circuit	✓	-	-	✓
  Charging for Battery	CC-CV Charging	✓	✓	✓	✓
  	Temperature-Range- Compatible Control	✓	✓	✓	✓
  Power supply	Charge Pomp Circuit for Main System	x1/3 V Down	x1/3 V Down	x1/3 V Down	1.2V,x1/3 V,1/2V Auto-Switch
  	1.8V-3.0V LDO	-	-	-	✓
  Protection Functions	Over-charge/Over -discharge Protection	✓	✓	✓	✓
  Others	Main System Communication	✓	✓	-	✓
  	External Sensor Device Trigger Control	✓	✓	-	✓
  	Battery Status Detection	✓	✓	-	✓

• For Transmitter-Side

  Function		S1A00121F MP
  Wireless Power Transmission	0.1W Power Transmission	✓
  	Automatic Switching of Coil Drive Mode (Half/Full Bridge)	✓
  Communication Function	Load Modulation	✓
  Protection : Safety Circuit	Temp Monitoring/ VCC Monitoring/ PMOS short Detection	✓
  Others	Removal / Landing Detection	✓

Next-Generation PMIC S1A00210B

The S1A00210B, currently under development, expands the charging voltage range from the conventional 4.75V–5.25V to 2.3V–5.25V, enabling compatibility with a wider variety of devices. Additionally, the charging current has been significantly increased from the conventional 30mA (max) to 300mA (max), making fast charging possible. Furthermore, the internal flash memory allows up to two charging profiles to be stored. These profiles enable fine-tuning of parameters for CC-CV charging and settings for battery degradation prevention, contributing to enhanced reliability and product quality.The reservation for engineering sample is scheduled to begin in late April, with shipments planned for August and order acceptance starting in November of the same year. For more details, please refer to the brief sheet.