Controller

OZ9967 Datasheet – Six String High Power LED Controller

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Part Number: OZ9967, OZ9967GN

Function: Six String High Power LED Controller

Package: 28 SOP, SSOP, TSSOP, Lead-free Pin Type

Manufacturer: O2Micro

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OZ9967 datasheet led controller

Description

The OZ9967 is an LED controller that drives up to six (6) strings of LEDs in parallel confi guration, with multiple LEDs per string connected in series. It provides six (6) LED current sense inputs in an “OR” confi guration to improve backlight reliability. This allows the backlight to remain functioning in the event that any string (s) is damaged during normal operation. OZ9967 supports external Pulse Width Modulation (PWM) or internal Low frequency PWM (LPWM) dimming control. Plus, it provides an integrated circuit to balance the current fl ow through each LED string. The balance transistors are external to accommodate different power dissipation resulting from the forward voltage difference
among the LED strings.

Pinout

OZ9967 pinout

Features

1. High frequency DC/DC boost converter controller

2. Drives 6 LED strings in parallel

3. Integrated LED current balance control circuit

4. Up to 1MHz switching frequency

5. External PWM or internal LPWM dimming control

6. LED short circuit protection

7. Over-current and over-voltage protection

8. Soft start function

Applications

1. LCD Monitor

2. LCD TV

OZ9967 Datasheet

DRV8711 Datasheet – Stepper Motor Controller ( PDF )

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Part Number: DRV8711

Function: STEPPER MOTOR CONTROLLER IC

Package: PowerPAD (HTSSOP) 38 Pin Type

Manufacturer: Texas Instruments

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DRV8711 datasheet pdf

Description

The DRV8711 is a stepper motor controller that uses external N-channel MOSFETs to drive a bipolar stepper motor or two brushed DC motors. A microstepping indexer is integrated, which is capable of step modes from full step to 1/256-step.

An ultra-smooth motion profile can be achieved using adaptive blanking time and various current decay modes, including an auto-mixed decay mode. Motor stall is reported with an optional back-EMF output.

A simple step/direction or PWM interface allows easy interfacing to controller circuits. A SPI serial interface is used to program the device operation. Output current (torque), step mode, decay mode,and stall detection functio ns are all programmable via a SPI serial interface.

Features

  • Supports full-step to 1/256 microstepping resolution
  • External N-channel MOSFET gate driver architecture for high power scalability
  • Programmable PWM current regulation with internal torque DAC
  • Multiple decay modes including slow, fast, and automatic mixed decay
  • Adaptive blanking time for improved current regulation accuracy
  • SPI interface for full configuration control
  • Step/Direction and PWM input control options
  • Integrated stall detection with optional back-EMF (BEMF) output

Pinout

DRV8711 datasheet

Design Notes

  • Requires careful MOSFET selection (low RDS(on), fast switching) for efficiency and thermal performance
  • Current sensing resistors determine peak motor current; layout must minimize noise and parasitics
  • Proper configuration of decay mode is critical for minimizing current ripple and acoustic noise
  • SPI initialization sequence must be completed before enabling motor outputs
  • Use proper gate drive layout and bootstrap/charge pump capacitors for stable operation

How to Choose This Part

  • Select when high current or high voltage stepper control is required using external MOSFETs
  • Ideal for applications needing fine microstepping (up to 1/256)
  • Suitable when SPI configurability and advanced tuning are required
  • Prefer over integrated drivers when thermal dissipation or scalability is critical

Applications

  • Stepper motor control in industrial equipment
  • Robotics and automation systems
  • Precision positioning and motion control
  • Medical instrumentation

Alternative / Equivalent Products

  • DRV8701 (brushed DC motor driver variant)
  • DRV8825 (integrated stepper driver)
  • TMC5160 (Trinamic high-end stepper driver)
  • A4988 (basic integrated stepper driver)

Other data sheets are available within the file: DRV8711DCP, DRV8711DCPR

 

DRV8711 Datasheet PDF Download


DRV8711 pdf