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Texas Instruments TPS65185x Power Management Integrated Circuit

Texas Instruments TPS65185x Power Management Integrated Circuit (PMIC) is a single-chip power supply designed for E-Ink® Vizplex™ displays used in portable e-reader applications. This device supports panel sizes up to 9.7 inches and greater. Two high-efficiency DC-DC boost converters generate ±16V rails that are boosted to 22V and –20V by two change pumps. This feature provides the gate driver supply for the Vizplex panel. Two tracking LDOs create the ±15V source driver supplies that support up to 120/200mA (TPS65185/TPS651851) of output current. All rails are adjustable through the I2C interface to accommodate specific panel requirements.

Features

  • Single chip power-management solution for E Ink Vizplex electronic paper (E-Paper) displays
  • Generates positive and negative gates, and source driver voltages and back-plane bias from a single, low-voltage input supply
  • Supports 9.7" and larger panel sizes
  • 3V to 6V Input voltage range
  • Boost converter for positive rail base
  • Inverting buck-boost converter for negative rail base
  • Two adjustable LDOs for source driver supply
    • TPS65185 LDO1: 15V, 120mA (VPOS)
    • TPS65185 LDO2: –15V, 120mA (VNEG)
    • TPS651851 LDO1: 15V, 200mA at VIN ≥ 3.6V (VPOS)
    • TPS651851 LDO2: –15V, 200mA at VIN ≥ 3.6V (VNEG)
  • Accurate output voltage tracking
    • VPOS – VNEG = ±50mV
    • Two charge pumps for gate driver supply
    • CP1: 22V, 15mA (VDDH)
    • CP2: –20V, 15mA, (VEE)
  • Adjustable VCOM driver for accurate panel-backplane biasing
    • 0V to –5.11V
    • ±1.5% accuracy (±10mV)
    • 9-Bit control (10mV nominal step size)
  • Active discharge on all rails
  • Integrated 10Ω, 3.3V power switch for disabling system power rail to E-Ink panel

Applications

  • Power supply for active Matrix E ink Vizplex panels
  • Electronic Paper Display (EPD) power supplies
  • E-Book readers
  • Dual-display phones and tablets
  • Application processors with integrated or software timing controller (OMAP™)

Typical Application Schematic

Schematic - Texas Instruments TPS65185x Power Management Integrated Circuit
Opublikowano: 2017-08-11 | Zaktualizowano: 2022-04-11