Texas Instruments DRV2605EVM-CT ERM/LRA Haptic Driver Evaluation DRV2605EVM-CT DRV2605EVM-CT Datenbogen
Produktcode
DRV2605EVM-CT
RTP (8-bit) DataFormat
_RTP = 0
Input
Steady-State
Output Magnitude
RatedVoltage[7:0]
½ RatedVoltage[7:0]
PWM
Input Interface
0%
50%
100%
RTP (8-bit) DataFormat
_RTP = 1
0x00
Closed Loop, BiDir_Input = 1
0x7F
0xFF
Full Braking
0x81
0x00
0x7F
0x3F
0xBF
75%
SLOS825B – DECEMBER 2012 – REVISED JANUARY 2014
Closed Loop Mode, Bi-Directional
In closed loop, bi-directional mode, the gives automatic overdrive and braking for both ERM and LRA devices.
This mode preserves compatibility with data created in open-loop signaling by keeping zero drive strength at the
mid-scale value. When input values less than the mid-scale value are given, the DRV2605 will treat them the
same as the mid-scale with zero drive.
In closed loop, bi-directional mode, the gives automatic overdrive and braking for both ERM and LRA devices.
This mode preserves compatibility with data created in open-loop signaling by keeping zero drive strength at the
mid-scale value. When input values less than the mid-scale value are given, the DRV2605 will treat them the
same as the mid-scale with zero drive.
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. Since this mode preserves compatibility with
existing/legacy dataDRV2605 formats, yet still provides closed loop benefits, it is the default configuration at
power up.
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 this mode preserves compatibility with
existing/legacy dataDRV2605 formats, yet still provides closed loop benefits, it is the default configuration at
power up.
The RTP mode has 8 bits of resolution over the I2C bus. The RTP data can be in either signed (2’s complement)
or unsigned format as defined by DataFormat_RTP.
or unsigned format as defined by DataFormat_RTP.
Restrictions: This mode is compatible with all DRV2605 interfaces except for TS2200 Library A (with fixed
overdrive programming). Library A should only be used in open loop mode. Libraries B through E (no overdrive)
may take advantage of this mode for automatic overdrive and braking.
overdrive programming). Library A should only be used in open loop mode. Libraries B through E (no overdrive)
may take advantage of this mode for automatic overdrive and braking.
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