MT5811
Maximizing IC Performance
Highly Integrated, High Performance
Wireless Power Transmitter
1 KEY FEATURES
Wide input voltage range from 3.5V to 12V
Less than 15W of power transfer
Compliant with latest WPC Qi specification
v1.2.4 with proprietary protocol support
Embedded 32-bit ARM M0
®
processor with
16KB eFlash and 4 KB SRAM
QC2.0/QC3.0, FCP/SCP support
Integrated three pairs of N-MOSFET drivers
(support for single coil applications only)
Integrated high voltage Buck converter to
reduce transmitter’s power consumption in
high voltage input cases
Integrated 3.3V LDO for internal and I/O
power supplies
Integrated 1.5V LDO for core power supply
Precise low-side current sensing function for
FOD and current mode demodulation
4 channels demodulation AFE for voltage
and current mode demodulation
16 channels dedicated DSP for robust ASK
demodulation
Dedicate FSK modulation hardware with
programmable modulation depth
2
high
performance
PWM
generation
Integrated 32KHz oscillator for ultra-low
power sleeping mode
Integrated Watchdog for sleeping power
monitor and wake-up
Integrated 60MHz programmable oscillator
for system and PWM generation
Supports 8~24MHz XTAL
Integrated 440~660MHz programmable PLL
for high performance PWM generation
Build-in 10bit ADC for voltage, current and
temperature measurement
Build-in 10bit DAC with output buffer
Low operating current and extremely low
standby current in deep sleeping mode
Supports SWD debug mode
Supports I2C, UART and SPI Interface with
plenty of GPIO’s
Dual VDD_IO pins for flexible I/O levels
Over-voltage/current/temperature protection
Input under voltage detection and lockout
function
Available in 6mm x 6mm QFN48 package
modules with 6 channels PWM output for
each module, both with programmable dead
time control
2 APPLICATIONS
WPC compliant wireless power transmitters
for smart phones and wearable devices
Other wireless power applications
Email:
sales@maxictech.com
Tel: 86-10-62662828
www.maxictech.com
Copyright © 2019 Maxic Technology Corporation
Rev 1.0
Page 1
MT5811
Maximizing IC Performance
Highly Integrated, High Performance
Wireless Power Transmitter
3 DESCRIPTION
The MT5811 is a highly integrated, high performance System on Chip (SoC) for magnetic induction
based wireless power transmitter solutions. It is fully compliant with the latest Wireless Power
Consortium (WPC) Qi v1.2.4 specification, with both Baseline Power Profile (BPP) and Extended Power
Profile (EPP) support. The integrated large size e-FLASH enables flexible customer function support.
The MT5811 integrates high voltage Buck, two LDO’s, three pairs of N-MOSFET’s drivers, four channels
of ASK demodulation Analog Front End (AFE), 16 channels of ASK demodulation DSP. The embedded
precise low-side current sensing, generic 10 bit ADC and DAC enable high performance FOD and Q
factor detection.
It supports over voltage, over current, under voltage protection and over temperature protection (OVP,
OCP, UVP, OTP) for safe operation.
The MT5811 integrates separated high frequency and low frequency oscillators for low power and low
cost application. The internal high frequency PLL with support of external crystal is designed for high
accuracy clock and PWM signal generation. The high flexible I/O configuration enables multi-coil
application with optimized standalone MOSFET driver (MT5603). The MT5811 is able to provide flexible
dead time control and phase shift generation to improve EMI performance.
The MT5811 supports multi-protocol power adaptor interface detection and control with support of QC
2.0/3.0, SCP, FCP, etc.
The MT5811 integrates an ARM Cortex M0 processor with 16KB eFlash memory and various serial
interfaces (I2C, UART, GPIO’s, etc.), offering powerful processing capabilities and code space. The
reference application is available with standard firmware. With the support of library (released
separately), customers can easily develop the customized features.
Email:
sales@maxictech.com
Tel: 86-10-62662828
www.maxictech.com
Copyright © 2019 Maxic Technology Corporation
Rev 1.0
Page 2
MT5811
Maximizing IC Performance
Highly Integrated, High Performance
Wireless Power Transmitter
4 TYPICAL APPLICATION CIRCUIT
Single Coil Application
VIN+
VIN-
SW_B
VDD5V
ISH
ISL
VIN
VIN_SNS
BST1
DRV1H
Optional
VIN5V
SW1
DRV1L
LDO1P5
LDO3P3
BST2
DRV2H
MT5811
GND
SW2
DRV2L
GND
Fast Charging Adapter
Interface (including
QC2.0/3.0, FCP, SCP,
etc.)
Functional Modules
(including Indicator LED,
Buzzer, Sensing,
Protections, etc.)
GPIO
DRV3H
GND
SW3
DRV3L
GPIO
XIN
XOUT
ISNS_O
DEMOD1
DEMOD0
Optional
Email:
sales@maxictech.com
Tel: 86-10-62662828
www.maxictech.com
Copyright © 2019 Maxic Technology Corporation
Coil
BST3
Rev 1.0
Page 3
MT5811
Maximizing IC Performance
Highly Integrated, High Performance
Wireless Power Transmitter
5 PIN CONFIGURATIONS AND FUNCTION
5.1 Pin Configurations
Top View
DEMOD0
VIN_SNS
DEMOD1
LDO3P3
ISNS_O
VDD5V
48
47
46
45
44
43
42
41
40
39
38
VIN5V
NC0
GPIOA1
1
2
3
37
SW_B
NC2
NC1
ISH
ISL
VIN
36
35
34
GND
BST1
DRV1H
GPIOA3
GPIOA4
GPIOA6
LDO1P5
4
5
6
7
33
32
SW1
DRV1L
BST3
DRV3H
MT5811
YYWWXX
XXXX
31
30
GND
XIN
XOUT
GPIOA7
VDDIOA
8
9
10
11
12
29
28
27
26
SW3
DRV3L
BST2
DRV2H
SW2
GND
25
Email:
sales@maxictech.com
Tel: 86-10-62662828
www.maxictech.com
Copyright © 2019 Maxic Technology Corporation
Rev 1.0
Page 4
MT5811
Maximizing IC Performance
5.2 Pin Functions
Pin Name
VIN5V
VDD5V
LDO1P5
VDDIOA
Highly Integrated, High Performance
Wireless Power Transmitter
Pin No.
1
41
7
12
Type
PWR
PWR
capacitor to GND.
PWR
PWR
1uF capacitor to GND.
Description
+5V input voltage pin, connect 4.7uF capacitor.
BUCK converter’s output, 100mA souring capability, connect 10uF and 0.1uF
Internal 1.5V LDO’s output, connect 1uF capacitor to GND.
Power supply for GPIO group A, connect 1.8V/3.3V/5V power, and connect
Power supply for GPIO group B, connect 1.8V/3.3V/5V power, and connect
VDDIOB
VIN
LDO3P3
GPIOA1
GPIOA3
GPIOA4
GPIOA6
GPIOA7
GPIOB0
GPIOB1
GPIOB2
GPIOB3
GPIOB4
GPIOB5
GPIOB8
GPIOB6
GPIOB7
GPIOC0
XIN
XOUT
DRV2L
SW2
DRV2H
BST2
DRV3L
SW3
DRV3H
13
38
42
3
4
5
6
11
14
15
16
17
18
19
20
21
22
23
9
10
24
25
26
27
28
29
30
PWR
1uF capacitor to GND.
PWR
PWR
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
PWM
PWM
PWM
ANA
PWM
PWM
PWM
Power Supply Input.
Internal 3.3V LDO’s output, connect 1uF capacitor to GND.
Can be configured as GPIO/SWCK/SDA/TXD/DM/FCP/DAC/ADC2
Can be configured as GPIO/SWDIO/SCL/TRXD/DP/DAC/ADC4
Can be configured as GPIO/SCL2/TRXD2/ADC5
Can be configured as GPIO/SDA2/TXD2/ADC7
Can be configured as GPIO/SDA2/TXD2/ADC9
Can be configured as GPIO/SCL3/TRXD3/PWM/ADC12
Can be configured as GPIO/SDA3/TXD3/PWM/ADC13
Can be configured as GPIO/SCS/PWM/ADC14
Can be configured as GPIO/MOSI/SCL3/ADC15
Can be configured as GPIO/SCP/PWM/ADC16
Can be configured as GPIO/MISO/SDA3/ADC17
Can be configured as GPIO/PWM
Can be configured as GPIO/LED/SCS/PWM
Can be configured as GPIO/LED/SCP/PWM
GPIO
Clock input pin, can be configured as external XTAL OSC(8~24MHz) /GPIO
Clock output pin, can be configured as external XTAL OSC(8~24MHz) /GPIO
Output-Drive pin for low side power MOSFET in the 2nd switch pair.
Switching node in the 2nd switch pair.
Output-Drive pin for high side power MOSFET in the 2nd switch pair.
Bootstrap cap in the 2nd switch pair, connect 10nF capacitor to SW2.
Output-Drive pin for low side power MOSFET in the 3rd switch pair.
Switching node in the 3rd switch pair.
Output-Drive pin for high side power MOSFET in the 3rd switch pair.
Email:
sales@maxictech.com
Tel: 86-10-62662828
www.maxictech.com
Copyright © 2019 Maxic Technology Corporation
Rev 1.0
Page 5
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