DRV2605L Datasheet, PDF (19/69 Pages) Texas Instruments – DRV2605L 2 to 5.2 V Haptic Driver for LRA and ERM With Effect Library and Smart-Loop Architecture

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DRV2605L
SLOS854C – MAY 2014 – REVISED SEPTEMBER 2014
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 16. Brownout Behavior
Slew rate > 3.6 kV/s
Time
8.4 Device Functional Modes
8.4.1 Power States
The DRV2605L device has three different power states which allow for different power-consumption levels and
functions. Figure 17 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 17. Power-State Transition Diagram
8.4.1.1 Operation With V_DD < 2 V (Minimum V_DD)
Operating the device with a V_DD value below 2 V is not recommended.
8.4.1.2 Operation With V_DD > 5.5 V (Absolute Maximum V_DD)
The DRV2605L 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.
8.4.1.3 Operation With EN Control
The EN pin of the DRV2605L device gates the active operation. When the EN pin is logic high, the DRV2605L
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 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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