Texas Instruments DRV201YFMR

Overview

DRV201YFMR from Texas Instruments is a voice coil motor (VCM) driver IC for camera auto-focus systems, integrating a 10-bit DAC, PWM/linear dual-mode current control, advanced ringing compensation, and I²C interface. It delivers up to 102.3 mA output current with ±10 LSB relative accuracy, operates from 2.5 V to 4.8 V, and supports resonant frequency compensation from 50 Hz to 150 Hz for fast lens settling in mobile phone cameras.

For engineers reviewing the DRV201YFMR datasheet, DRV201YFMR pinout, DRV201YFMR application, or DRV201YFMR equivalent, this page provides verified technical context, confirmed package mapping (6-ball YFM WCSP), validated pin functions, real-world settling time data (±10% error band), and two documented alternative VCM drivers with explicit functional and application-level differences.

Technical Context

The DRV201YFMR implements a half-bridge PWM or high-side linear current source architecture, selectable via the MODE register's PWM/LIN bit. Current regulation uses an internal 1-Ω sense resistor and error amplifier referenced to the 10-bit DAC output, enabling precise closed-loop control of VCM position.

Ringing compensation is dynamically tuned using the VCM_FREQ register (07h) to match mechanical resonance between 50 Hz and 150 Hz; it supports ±10% tolerance with 1/f_VCM mode and ±30% with 2/f_VCM mode, eliminating need for per-unit calibration. Fault protection includes open/short detection on ISOURCE/ISINK, thermal shutdown at 140°C, and undervoltage lockout with 50–250 mV hysteresis.

Key Specifications

Pinout & Package

DRV201YFMR is housed in a 6-ball wafer chip-scale package (YFM) with 0.4-mm pitch and 0.15-mm profile, optimized for space-constrained camera modules. Pin numbering follows bottom-view orientation with A1 marked by solid fill.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voice coil motor driver applications.

Compared with DRV201YFMR, DRV202YFMR offers higher-resolution resonance tuning and faster settling without hardware changes, while BU3298FV trades advanced features for lower unit cost and simpler integration in non-mobile applications where size and speed are secondary.

Availability

DRV201YFMR is available at Aetrix Electronics and suitable for smartphone camera modules, digital still camera autofocus subsystems, and embedded vision systems requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle support.

Supply support for DRV201YFMR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability silicon solutions for industrial, automotive, and consumer markets.

The DRV201 product line was designed specifically for miniaturized camera autofocus systems, emphasizing ultra-low profile packaging, integrated signal conditioning, and intelligent mechanical resonance adaptation.

FAQ

What is the maximum VCM current supported by the DRV201YFMR?

The DRV201YFMR supports a maximum output current of 102.3 mA, corresponding to full-scale code (0x3FF) of its integrated 10-bit DAC. This value is confirmed in Section 6.5 of the SLVSB25C datasheet under "IMAX" parameter, and is achievable within the 2.5–4.8 V supply range and –40°C to +85°C ambient temperature. The DRV201YFMR maintains this rating with built-in thermal shutdown at 140°C to prevent damage during sustained load.

Does the DRV201YFMR require external current-sense resistors?

No, the DRV201YFMR does not require external current-sense resistors. It integrates a precision 1-Ω sense resistor and closed-loop error amplifier that compares the sensed voltage against the DAC output. This is explicitly stated in Section 7.3.1 and verified in the "VCM DRIVER STAGE" subsection of Section 6.5, where "IRES" (relative accuracy) and "ILIMIT" (average current limit) are specified with internal sensing assumed.

How does the ringing compensation function work in the DRV201YFMR?

The DRV201YFMR implements ringing compensation by generating an optimized current ramp when the VCM_CURRENT register value changes, based on the VCM's mechanical resonance frequency. Users program the VCM_FREQ register (07h) with a value from 50–150 Hz in 1-Hz steps, enabling either 1/f_VCM (±10% tolerance) or 2/f_VCM (±30% tolerance) compensation modes. This is detailed in Section 7.3.2 and Table 1 of the SLVSB25C datasheet.

What package type is used for the DRV201YFMR, and what are its dimensions?

The DRV201YFMR uses the YFM package: a 6-ball wafer chip-scale package (WCSP) with 0.4-mm ball pitch, 0.80 mm × 1.48 mm nominal body size, and 0.15-mm maximum height. This is confirmed in the "Device Information" table on page 2 and the "Package Heights" specification in Section 3 of the SLVSB25C datasheet. The YFM variant has no top-side markings.

Can the DRV201YFMR operate in both PWM and linear modes simultaneously?

No, the DRV201YFMR cannot operate in both PWM and linear modes simultaneously. The MODE register's PWM/LIN bit selects one operational mode at a time - either PWM (half-bridge switching) or linear (high-side current source). Section 7.3.1 states "PWM or linear mode can be selected with the PWM/LIN bit," and Figure 5 confirms exclusive ACTIVE-mode behavior based on VCM_CURRENT register value and mode selection. Concurrent operation is electrically and functionally unsupported.