Timer ICs / ASSPs

Wireless Power Receiver Control IC With Charge Function S-8473 Series

The S-8473 Series is Wireless Power Receiver Control IC, which is configured with an overvoltage detection circuit, a charge current control circuit, a VBAT voltage detection circuit, a UVLO circuit, high temperature / low temperature detection circuit, etc. This IC has a charge function to a small lithium-ion rechargeable battery.


Power supply voltage
Vdd = 2.2 V to 5.0 V
Current consumption during charge operation
ISS1 = 250 μA typ.
VBAT pin current consumption during power-down
IPDN = 1.0 μA max.
UVLO detection voltage
VUVLO− = 2.0 V typ.
Charge function to a small lithium-ion rechargeable battery
Charge current: ILIM = 33 mA typ.
Precharge current: IPRE = 3.3 mA typ.
Precharge completion voltage: 2.4 V to 3.4 V (50 mV step)
Charge completion voltage: 4.0 V to 4.5 V (50 mV step)
Recharge start voltage: 3.6 V to 4.45 V*1
Short-circuit detection voltage: 1.5 V to 2.0 V (50 mV step)
Charge timer function:
The charge operation stops after the elapse of 4.0 hours. (CCT = 4.7 nF)
The time is settable by connecting an external capacitor to the CT pin.
High temperature / low temperature protection function
Available by connecting a thermistor to the TH pin.
Status display function
Available by connecting an external LED to the STATUS pin.
During charge operation: Lighting
During charge operation stop: Lights-out
During error detection: Blinking
Operation temperature range
Ta = −40°C to +85°C
Lead-free (Sn 100%), Halogen-free

*1. Recharge start voltage = charge completion voltage − charge hysteresis voltage (The charge hysteresis voltage can be selected from a range of 0.05 V to 0. 40 V in 50 mV step.)


  • Device for wireless power
  • Small-sized wireless charge system