Overview
The DRV201YMBR, produced by Texas Instruments, is a highly advanced voice coil motor (VCM) driver designed specifically for high-performance autofocus in camera modules. This device is optimized to control the current in the VCM, which generates a magnetic field to move the lens stack connected to a spring. The DRV201YMBR supports an I2C interface for controlling the VCM current and implementing autofocus functions efficiently.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.5 - 4.8 | V |
| Maximum VCM Current | 100 | mA |
| I2C Data Rate | Up to 400 kbit/s | |
| Operating Temperature Range | -40 to 85 | °C |
| ESD Rating (HBM) | ±4000 | V |
| ESD Rating (CDM) | ±500 | V |
| PWM Switching Frequency | 0.5 MHz to 4 MHz | |
| VCM Mechanical Ringing Frequency Range | 50 Hz to 150 Hz |
Key Features
- I2C Interface: Supports data rates up to 400 kbit/s and includes features like auto-increment addressing and compliance with I2C standard 3.
- Current Control Modes: Offers both linear and PWM current control modes, with the ability to switch between them using the PWM/LIN bit in the MODE register.
- Ringing Compensation: Internally compensates for mechanical ringing in the lens position by generating an optimized ramp, ensuring fast autofocus and a pleasant user experience.
- Power Modes: Includes SHUTDOWN, STANDBY, and ACTIVE modes to manage power consumption efficiently.
- Fault Detection: Features open and short-circuit detection on VCM pins, undervoltage lockout (UVLO), and overtemperature protection.
- ESD Protection: All pins have a 4-kV HBM ESD rating.
Applications
The DRV201YMBR is primarily designed for high-performance autofocus in camera modules. It is particularly useful in applications where precise and fast lens movement is required, such as in smartphone cameras, digital cameras, and other optical systems that demand accurate autofocus functionality.
Q & A
- What is the primary application of the DRV201YMBR?
The DRV201YMBR is primarily used for high-performance autofocus in camera modules.
- What are the input voltage range and maximum VCM current of the DRV201YMBR?
The input voltage range is 2.5 to 4.8 V, and the maximum VCM current is 100 mA.
- What types of current control modes does the DRV201YMBR support?
The DRV201YMBR supports both linear and PWM current control modes.
- How does the DRV201YMBR compensate for mechanical ringing in the lens position?
The device compensates for mechanical ringing by generating an optimized ramp whenever the current value in the VCM_CURRENT register is changed.
- What are the different power modes of the DRV201YMBR?
The device has SHUTDOWN, STANDBY, and ACTIVE power modes.
- What is the ESD rating of the DRV201YMBR?
All pins have a 4-kV HBM ESD rating.
- How does the DRV201YMBR communicate with other devices?
The device communicates through an I2C interface that supports data rates up to 400 kbit/s.
- What is the range of the VCM mechanical ringing frequency that can be controlled by the DRV201YMBR?
The VCM mechanical ringing frequency can be controlled from 50 Hz to 150 Hz.
- What type of fault detection does the DRV201YMBR feature?
The device features open and short-circuit detection on VCM pins, undervoltage lockout (UVLO), and overtemperature protection.
- How does the DRV201YMBR enter SHUTDOWN mode?
The device enters SHUTDOWN mode if the SCL pin has a DC level below 0.63 V for at least 0.5 ms.
