TPIC2050 Serial I/F Controlled 9-Channel Motor-Driver With 3-Beam Laser Diode Driver

1 Features

• Serial Port Digital Interface
  • Serial Peripheral Interface (SPI)
  • 4-Wire Interface: SSZ, SCLK, SIMO, SOMI
  • Maximum Read/Write 35 MHz
  • 3.3-V Digital I/O
• Actuator and Motor Driver
  • PWM Control With H-Bridge Output
  • Focus / Tracking / Tilt Actuator Driver With 12-Bit DAC Control
  • Sled Motor Drivers With Current Mode, 10-Bit DAC Control
  • Load Driver With 12-Bit DAC Control Selectable 5 V, 12 V
  • Stepping Motor Driver With 8-Bit PWM Control
• Spindle Motor Driver
  • Low Rdson 0.3-Ω Typical MOSFET Output
  • Sensor-Less: Rotor Position Sense by Motor BEMF
  • Applicable for 10500 rpm Revolution Speed (Assumed in Using 12-Pole Motor)
  • 12-Bit Spindle DAC Programmed Via Serial Port
  • Self-Contained Inductive Position Sense and Startup
  • Auto-Brake Function Which Selects the Optimal Brake Mode in Each Rotation Speed
  • 1.5-A Maximum Continuous Current Excluding Thermal Issues
• Utility Functions
  • Status Latch: Act Timer, SIF Error, PWR Monitor, Thermal Protection, and OCP Error
  • On-Chip Thermometer (15 to 165°C)
• 3-Beam Laser Diode Driver
  • 120-mA Current Output With 11-Bit DAC Register or Analog Input (VLDDIN)
  • Slope-Controlled Current for Rapid Change
  • Select Output Port of CD, DVD, BD by Serial Bit
• Protection
  • Individual Thermal Protect Circuit on SPM and Actuator Driver
  • Two Alert Levels: Pre-Detect and Detect in Thermal Protection
  • ACTTEMP: Monitor the Actuator Temperature Calculated from Integrating the DAC Value Set Up in the Past
  • Short-Circuit Protection in SPM, Sled, Load, Actuator, and Step-Driver Channel
  • Hardware Device Disable Pin, XRSTIN
  • Power Monitor by Undervoltage Lockout (UVLO) and Overvoltage Protection (OVP)
  • Tray-Lock Detection
  • PREOVP-12V: Prevent the 12-V OVP Detection by the Motor BEMF at SPM Brake

2 Applications

Optical Disc Drive (Blu-ray, DVD, CD)

3 Description

The TPIC2050 is low-noise-type motor driver IC suitable for 12-V ODD. The 9-channel driver, IC controlled by serial interface, is optimum for driving a spindle motor, sled motor (stepping motor applicable), load motor, focus / tracking / tilt actuators, and stepping motor for the collimator lens.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

4 Revision History

5 Description (continued)

The spindle motor driver part builds in the sensor-less logic that attains low-noise operation at start-up and while running. Motors or sensors, such as a Hall device, are not required by the starting circuit for self-starting, or for performing position detection by BEMF. As the output stage of all channels works in efficient PWM driving, low-power operation by PWM control is possible. Neutral zone-less control is possible for a focus / tracking / tilt actuator driver. In addition, the spindle part output current limiting circuit, thermal shutdown circuit, sled-end detection circuit, collimator lens end detection circuit, actuator protection, and three beam laser drivers are built in. The newly added built-in thermometer can measure IC temperature.

6 Pin Configuration and Functions

DFD Package

56-Pin HTSSOP

Top View