RT3181A

Wireless Power Transmitter for 5W/15W Solution

The RT3181A is a highly integrated and scalable solution for wireless power transmitter applications. The RT3181A is designed to support the major wireless power standards - WPC (Qi). The RT3181A can be configured to various type of transmitter in WPC definition.

The RT3181A supports fully integrated design for WPC LP A11 transmitter which could be powered from a 5V output of USB or AC adaptor in low power applications. The RT3181A is able to support WPC MP-A5 transmitter design with external power stage for medium power applications.

The RT3181A can be paired with a smart AC adapter from selected suppliers to provide reduced system cost and optimal efficiency over the range of power usage.

Applications

Mobile Phones
Phablets/Tablets
Wearable Devices
Medical and Industrial

Key Spec.
	RT3181A
Status	NRND
Vin (min) (V)	17
Vin (max) (V)	5
Iin (max) (A)	2
Power Rating (W)	7.5
WPC Protocol	BPP
Compliance Ver	WPC 1.2.4
Features	1.8V LDO PMU;3.3V LDO PMU;5V Buck PMU;Aux ADC Input;Buck-boost controller;Current sensing amplifier;Die Temperature Sensor;FOD-Q factor;H-bridge Class D MOSFET;I2C Master;I2C Slave;LED driver;OCP;OTP;OVP;QC Interface
Package Type	WQFN6x6-48

Features

High Integration with Internal H-Bridge Power Stage and Current Sense Amplifier, Optimized for LP-A11 Solution
High Power with External Power Stage, Optimized for MP-A5 Solution
No Current Transformer Required
Low Quiescent Current Plus
► Selectable Ping Cycle in Custom Applications
► Low Current Sleep Mode Options Including "Off" State with Wake Up I/O Pin
Programmable Thermal Protection
Support Foreign Object Detection
Notifications -
► 1 Buzzer
► 2 LEDs, Resistor Programmable
I²C Host Applications Interface (Option)
Internal Watchdog Timer
48-Lead WQFN Package

Datasheet
Title	Version	Last Update	Download
RT3181A: Wireless Power Transmitter for 5W/15W Solution	Initial Release	2020/07/15

Technical Documents
Title	Item Type	Last Update	Download
Richtek Featured Product Tree [Aug., 2023]	Selection Guide	2023/08/07

Videos
Title	Last Update	Views
High accuracy, low quiescent current battery power management solutions for wireless portable applications	2022/09/27	495

Part Number	Package Type	Package Qty.	Free Sample	Distributor	Stock	Buy From Authorized Distributor
RT3181AGQW	WQFN6x6-48	2,500	Request	Digikey	4,814	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available

Please confirm with our distributor or sales representative for actual stock status.