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Multi-Output DC-DC Power Supply with VCOM Amplifier and Temperature Sensor for E-Paper Applications

Complete Panel Power Solution for Electrophoretic Displays in Small, 5mm x 5mm, 32-Pin TQFN Package

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

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Key Features

  • Four Regulated Output Voltages for Source- and Gate-Driver Power Supplies
  • VPOS + VNEG = ±50mV Tracking Accuracy
  • Measures Internal and Remote Diode Temperature Sensors
  • True Shutdown on All Outputs
  • 2.7V to 5.5V IN Supply Voltage Range
  • Controlled Inrush Current During Soft-Start
  • I²C Serial Interface for Temperature Read, Power Output Enable, POS Voltage Regulation Set-Point Adjustment, Power-Up/Power-Down Sequencing Adjustment, and Fault Monitoring

Applications/Uses

  • e-Book Readers

Description

The MAX17135 is a complete power-management IC for E-paper displays that provides source- and gate-driver power supplies, a high-speed VCOM amplifier, and a temperature sensor.

The source-driver power supplies consist of a boost converter and an inverting buck-boost converter that generates +15V (up to +17V) and -15V (up to -17V), respectively. Both source-driver power supplies can deliver up to 200mA. The positive source-driver supply regulation voltage (VPOS) can be set either by using an I²C interface or by connecting an external resistor-divider. The negative source-driver supply voltage (VNEG) is always tightly regulated to -VPOS within ±50mV.

The gate-driver power supplies consist of regulated charge pumps that generate +22V (up to +40V) and -20V (up to -40V) and can deliver up to 20mA each.

The IC features a VCOM amplifier output whose output voltage is controlled by an internal 8-bit digital-to-analog converter (DAC). The DAC is programmable through an I²C interface and allows small-voltage-step sizes per DAC step.

The IC includes a temperature sensor that provides the ability to read the internal IC temperature and an external panel temperature with the use of an external temperature-sensing diode. Temperature output data is supplied through I²C.

The device is available in a space-saving, 32-pin TQFN package and is specified over the -40°C to +85°C extended temperature range.

Simplified Block Diagram

MAX17135: Simplified Operating Circuit MAX17135: Simplified Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .