DRV201A Datasheet, PDF (9/25 Pages) Texas Instruments – VOICE COIL MOTOR DRIVER FOR CAMERA AUTO FOCUS

DRV201A
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MODES OF OPERATION
SLVSBN6 – JUNE 2013
SHUTDOWN If the driver detects SCL has a DC level below 0.63 V for duration of at least 0.5 ms, the driver will
enter shutdown mode. This is the lowest power mode of operation. The driver will remain in shutdown for
as long as SCL pin remain low.
STANDBY If SCL goes from low to high the driver enters STANDBY mode and sets the default register values.
In this mode registers can be written to through the I²C interface. Device will be in STANDBY mode when
VCM_CURRENT register is set to zero. From ACTIVE mode the device will enter STANDBY if the
SW_RST bit of the CONTROL register is set. In this case all registers will be reset to default values.
STANDBY mode is entered from ACTIVE mode if any of the following faults occur: Over
temperature protection fault (OTPF), VCM short (VCMS), or VCM open (VCMO). When
STANDBY mode is entered due to a fault condition current register is cleared.
ACTIVE The device is in ACTIVE mode whenever the VCM_CURRENT control is set to something else than
zero through the I²C interface. In ACTIVE mode VCM driver output stage is enabled all the time resulting
in higher power consumption. The device remains in active mode until the SW_RST bit in the CONTROL
register is set, SCL is pulled low for duration of 0.5 ms, VCM_CURRENT control is set to zero, or any of
the following faults occur: Over temperature protection fault (OTPF), VCM short (VCMS), or VCM open
(VCMO). If active mode is entered after fault the status register is automatically cleared.
Copyright © 2013, Texas Instruments Incorporated
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