Wireless Charging Sonic Electric Toothbrushes
WAS-1972EN V1.00
16 / 17
December 27, 2021
API Name
OCP_CAL
API Function
OCP comparator circuit offset calibration
Input Parameters
Null
Output Parameters
Null
Program Description After this API is executed, the OCP comparator circuit offset will be calibrated
API Name
DELAY_10µs
API Function
10µs delay subroutine
Input Parameters
ACC
Output Parameters
Null
Program Description After this API is executed,, there is a delay of ACC×10 microseconds
Test Data
Test Item
V
IN
(V)
I
IN
(mA)
V
OUT
(V)
I
OUT
(mA)
Efficiency
Standby current
(uncharged)
Measured Data
5.1
80
5.25
45
57.9%
1µA
Conclusion
This application note has introduced how to use the BP45F0044 and BP45F1330 devices for
wireless charging toothbrushes. It has also explained the operating principle and software control
process of wireless charging toothbrushes. Based on the wireless charging toothbrush charging
management, it is shown how ID recognition is implemented and the lithium battery is charged by
the integrated linear battery charger using a constant current and constant voltage. The charging
base includes an integrated demodulation circuit, which reduces the PCB size and the number of
required peripheral components resulting in simplified product development.
Reference File
Reference file: BP45F0044 & BP45F1330 Datasheet.
For more information, consult the Holtek official website: www.holtek.com.
Revision and Modification Information
Date
Author
Issue
Modification Information
2021.06.08
陳振隆
V1.00
First revision
