Texas Instruments DRV2605EVM-CT ERM/LRA Haptic Driver Evaluation DRV2605EVM-CT DRV2605EVM-CT Datenbogen
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Produktcode
DRV2605EVM-CT
Input
Steady-State
Output Magnitude
RatedVoltage[7:0]
½ RatedVoltage[7:0]
Full Braking
PWM
Input Interface
0%
50%
100%
RTP (8-bit) DataFormat
_RTP = 1
0x00
Closed Loop, BiDir_Input = 0
0x7F
0xFF
SLOS825B – DECEMBER 2012 – REVISED JANUARY 2014
Closed Loop Mode, Uni-Directional
In closed loop, uni-directional mode, the DRV2605 gives automatic overdrive and braking for both ERM and LRA
devices. This is the most straight-forward mode to use and understand, and uses the full, 8-bit resolution of the
driver. This mode gives the best performance; however, the data format is not physically compatible with the
open loop mode data that may be used in some existing systems
In closed loop, uni-directional mode, the DRV2605 gives automatic overdrive and braking for both ERM and LRA
devices. This is the most straight-forward mode to use and understand, and uses the full, 8-bit resolution of the
driver. This mode gives the best performance; however, the data format is not physically compatible with the
open loop mode data that may be used in some existing systems
The reference level for steady-state, full-scale drive is set by the RatedVoltage[7:0] value (once auto calibration
is performed). The output voltage may momentarily exceed the rated voltage for automatic overdrive and
braking, but will not exceed the ODClamp[7:0] voltage. Braking happens automatically based on the input signal
when the back-EMF feedback determines that it is necessary.
is performed). The output voltage may momentarily exceed the rated voltage for automatic overdrive and
braking, but will not exceed the ODClamp[7:0] voltage. Braking happens automatically based on the input signal
when the back-EMF feedback determines that it is necessary.
Since the system is uni-directional in this mode, only unsigned data should be used. The RTP mode has 8 bits of
resolution over the I2C bus. DataFormat_RTP = 0 (signed) is not recommended for this mode.
resolution over the I2C bus. DataFormat_RTP = 0 (signed) is not recommended for this mode.
Restrictions: For the RTP interface, DataFormat_RTP should be set to 1 (unsigned).
Copyright © 2012–2014, Texas Instruments Incorporated
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