AW86225
October 2021 V1.9
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20 Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD
Figure 20 Brake loop
Protection Mechanisms
Over Temperature Protection (OTP)
The device has automatic temperature protection mechanism which prevents heat damage to the chip. It is
triggered when the junction temperature is larger than the preset temperature high threshold (default = 160°C).
When it happens, the output stages will be disabled. When the junction temperature drops below the preset
temperature low threshold (less than 130°C), the output stages will start to operate normally again
Over Current (Short) Protection (OCP)
The short circuit protection function is triggered when HDP/HDN is short too PVDD/GND or HDP is short to
HDN, the output stages will be shut down to prevent damage to itself. When the fault condition is disappeared,
the output stages of device will restart.
VDD Under Voltage Lock Out Protection (UVLO)
The device has a battery monitor that monitors the VDD level to ensure that is above threshold 2.7V, In the
event of a VDD drop, the device immediately power down the H-bridge driver and latches the UVLO flag.
Drive Data Error Protection (DDEP)
When haptic data sent to drive LRA is error such as: a DC data or almost DC data, it will cause the LRA heat
to brake. The device configurable immediately power down the H-bridge driver and latched the DDEP flag.
I
2
C Interface
This device supports the I²C serial bus and data transmission protocol in fast mode at 400kHz and fast mode
plus at 1000kHz. This device operates as a slave on the I²C bus. Connections to the bus are made via the
open-drain I/O pin SDA and I pin SCL. The pull-up resistor can be selected in the range of 1k~10kΩ and the
typical value is 4.7kΩ. This device can support different high level (1.8V~3.3V) of this I
2
C interface.
Device Address
The I
2
C device address (7-bit) is 0x58 and cannot be set.
Data Validation
When SCL is high level, SDA level must be constant. SDA can be changed only when SCL is low level.
SCL
SDA
Data Line
Stable
Data Valid
Change
of Data
Allowed
Figure 21 Data Validation Diagram
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