DRV2605L-Q1 Datasheet, PDF (18/67 Pages) Texas Instruments – Automotive Haptic Driver for LRA and ERM

DRV2605L-Q1
SLOS874A – OCTOBER 2015 – REVISED OCTOBER 2015
www.ti.com
V_DD
2V
1.8 V
Case 1
Return to
default
state
Case 2
Case 3
Unknown
state
Unknown
state
Case 4
Return to
default
state
V_DD
REG
V_(BOT)
0V
Slew rate > 3.6 kV/s
Slew rate < 3.6 kV/s
Slew rate < 3.6 kV/s
Figure 15. Brownout Behavior
Slew rate > 3.6 kV/s
Time
7.4 Device Functional Modes
7.4.1 Power States
The DRV2605L-Q1 device has three different power states which allow for different power-consumption levels
and functions. Figure 16 shows the transition in to and out of each state.
EN = 0
Shutdown
EN = 1
STANDBY = 0
Standby
EN = 0
Active
STANDBY = 1
DEV_RESET = 1
Figure 16. Power-State Transition Diagram
7.4.1.1 Operation With V_DD < 2 V (Minimum V_DD)
Operating the device with a V_DD value below 2 V is not recommended.
7.4.1.2 Operation With V_DD > 5.5 V (Absolute Maximum V_DD)
The DRV2605L-Q1 device is designed to operate at up to 5.2 V, with an absolute maximum voltage of 5.5 V . If
exposed to voltages above 5.5 V, the device can suffer permanent damage.
7.4.1.3 Operation With EN Control
The EN pin of the DRV2605L-Q1 device gates the active operation. When the EN pin is logic high, the
DRV2605L-Q1 device is active. When the EN pin is logic low, the device enters the shutdown state, which is the
lowest power state of the device. The device registers are not reset. The EN pin operation is particularly useful
for constant-source PWM and analog input modes to maintain compatibility with non-I²C device signaling. The
EN pin must be high to write I²C device registers. However, if the EN pin is low the DRV2605L-Q1 device can
still acknowledge (ACK) during an I²C transaction, however, no read or write is possible. To completely reset the
device to the powerup state, set the DEV_RESET bit in register 0x01.
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