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Maxim Integrated MAX16928

Automotive TFT-LCD Power Supply with Boost Converter and Gate Voltage Regulators

Overview

TopologyBoost Converter
Input voltage4.5-5.5 V
Switching frequency1980-2420 kHz
Output 112 V / 0.4 A
IC revision2

Description

The MAX16928 is a highly integrated power supply for automotive TFT-LCD applications. The device integrates one boost converter, one 1.8V/3.3V regulator controller, and two gate voltage regulators. The device comes in several versions to satisfy common automotive TFT-LCD power-supply requirements (see the Ordering Information table).The boost converter uses spread-spectrum modulation to reduce peak interference and to optimize EMI performance. The sequencing input (SEQ) allows flexible sequencing of the positive-gate and negative-gate voltage regulators. The power-good indicator (PGOOD) indicates a failure on any of the converters or regulator outputs. Integrated thermal shutdown circuitry protects the device from overheating.The MAX16928 is available in a 20-pin TSSOP package with exposed pad and operates over the -40NC to +105NC temperature range.

Features

  • High-Power (Up to 6W) Boost Output Providing Up to 18V
  • 1.8V or 3.3V Regulator Provides 500mA with External npn Transistor
  • One Positive-Gate Voltage Regulator Capable of Delivering 20mA at 28V
  • One Negative-Gate Voltage Regulator
  • High-Frequency 2.2MHz Operation
  • Flexible Stand-Alone Sequencing
  • True Shutdown™ Boost Converter
  • Internal Soft-Start
  • Overtemperature Shutdown
  • -40NC to +105NC Operation
  • AEC-Q100 Qualified

Typical applications

  • Automotive Navigation Systems
  • Automotive Dashboards
  • Automotive Central Information Displays

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