Epson's Power Management IC (PMIC) is a highly integrated IC that combines the functions required for battery charge and discharge management into a single chip.

It includes wireless power receiving, rechargeable battery charge/discharge control, power supply for peripheral ICs, and protection functions. With advanced charging control, it supports fast charging while helping reduce battery degradation, as well as long-life product design through charge level control.

Epson's PMIC helps solve key design challenges

  1. Save board space

    • Epson's PMIC integrates the functions needed for charge/discharge management into a single chip. This helps reduce external components and simplify circuit design, supporting smaller product designs.

  2. Extend operating time

    • Low-power design helps extend the operating time of battery-powered devices.

  3. Shorten charging time

    • Epson's fast-charging profile enables shorter charging time while helping reduce battery degradation.

  4. Reduce battery runtime loss during long-term use

    • Epson's fast-charging profile and charge level control help balance user convenience with longer battery life.

  5. Reduce noise impact on sensors

    • The inductor-less power supply helps reduce the impact of power-supply noise on sensor accuracy.

  6. Reduce design workload

    • Epson provides dedicated evaluation boards and software. Engineers can easily evaluate PMIC functions by simply connecting the board to a PC.

Product Lineup

Model  
S1A00210B The most advanced PMIC in the series, supporting both wireless power receiving and contact charging.
S1A00211B A compact model based on the S1A00210B, with the wireless power receiving function removed.
S1A00115B A PMIC that balances smaller size and lower cost by focusing on essential functions.

Specifications

  S1A00210B S1A00211B S1A00115B
Input Voltage 2.3V-5.25V 2.3V-5.25V 4.5V-5.5V
Charging Voltage Range 2.6V-2.8V, 3.6V-4.5V 2.6V-2.8V, 3.6V-4.5V 3.0V-4.35V
Charging Current CC-CV CC-CV CC-CV
Charging Current 0-300mA
Wireless 0-20mA		 0-300mA 0-40mA
Power Supply LDO
Charge Pump		 LDO
Charge Pump		 Charge Pump
Protection function ✓ ✓ ✓
Comunication I2C
Load Modulation 		I2C
Load Modulation 		-
Package WCSP48
2.4 x 3.4 x 0.5mm		 WCSP36
2.4 x 2.4 x 0.5mm		 WCSP30
2.4 x 2.1 x 0.5mm
Wireless Reception ✓ - -
Other Motion sensor control
Holl sensor control
LED Driver
Advanced Fast-charging control		 Motion sensor control
Holl sensor control
LED Driver
Advanced Fast-charging control		 Motion sensor control
Holl sensor control
LED Driver
Brief Sheet S1A00210 Brief Sheet
326KB		 S1A00211B Brief Sheet
307KB		 S1A00115 Brief Sheet
326KB

Use Together with the Transmitter IC (S1A00121F)

Epson also offers a transmitter IC that wirelessly supplies power to the receiver-side PMIC.

When used together, the PMIC and transmitter IC can communicate using load modulation, enabling stable wireless power transfer.
Examples of information that can be exchanged:

  • Rectified voltage
  • Charging status, including battery voltage, temperature, cycle count, and status
  • Device ID
  • IC number
  S1A00121F
Input Voltage 4.5V-5.5V
Transferred Power 0.1W
Transferred frequency 54kHz~400kHz
Communication I2C
Load modulation
PKG SQFN9-64pin 9.0 x 9.0 x 1.0mm
Other LED Driver
Data sheet S1A00121 Brief Sheet
326KB