TPS65181B

PMIC，用于启用 E Ink Vizplex 技术的电子纸显示器

The TPS6518x and TPS65181xB family of devices are single-chip power supplies designed to for E Ink Vizplex displays used in portable e-reader applications and support panel sizes up to 9.7 inches. Two high-efficiency DC–DC boost converters generate ±17-V rails which are boosted to 22 V and –20 V by two change pumps to provide the gate driver supply for the Vizplex panel. Two tracking LDOs create the ±15-V source driver supplies which support up to 120-mA of output current. All rails are adjustable through the I2C interface to accommodate specific panel requirements.

Accurate back-plane biasing is provided by a linear amplifier and can be adjusted either by an external resistor or the I2C interface. The VCOM driver can source or sink current depending on panel condition. For automatic VCOM adjustment in production line, VCOM can be set from –0.3 V to –2.5 V with 8-bit control through the serial interface. The power switch is integrated to isolate VCOM driver from E Ink® panel.

The TPS6518x and TPS65181xB devices provide precise temperature measurement function to monitor the panel temperature during operation. The TPS65180 and TPS65180B requires the host processor to trigger the temperature acquisition through an I2C write whereas the TPS65181 and automatically updates the temperature every 60 s.

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Single-Chip Power Management Solution for

E Ink® Vizplex™ Electronic Paper Displays

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Generates Positive and Negative Gate and

Source Driver Voltages and Back-Plane Bias from

a Single, Low-Voltage Input Supply

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3-V to 6-V Input Voltage Range

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Boost Converter for Positive Rail Base

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Inverting Buck-Boost Converter for Negative Rail

Base

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Two Adjustable LDOs for Source Driver Supply

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LDO1: 15 V, 120 mA VPOS

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LDO2: –15 V, 120 mA VNEG

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Accurate Output Voltage Tracking

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VPOS – VNEG = ±50 mV

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Two Charge Pumps for Gate Driver Supply

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CP1: 22 V, 10 mA VDDH

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CP2: –20 V, 12 mA, VEE

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Adjustable VCOM Driver for Accurate Panel-

Backplane Biasing

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–0.3 V to –2.5 V

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±1.5% Accuracy ±18 mV

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8-Bit Control 11-mV Nominal Step Size

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15-mA Maximum Integrated Switch

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Integrated 3.3-V Power Switch for Disabling

System Power Rail

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Thermistor Monitoring

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–10°C to +85°C Temperature Range

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±1°C Accuracy from 0°C to 50°C

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I2C Serial Interface

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Slave Address 0x48h 1001000

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Flexible Power-Up Sequencing

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Interrupt and Sleep Mode Support

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Thermally-Enhanced Package for Efficient Heat

Management 48-Pin 7 mm × 7 mm × 0.9 mm VQFN

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APPLICA ONS

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Power Supply for Active Matrix E Ink Vizplex

Panels

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EPD Power Supply

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E-Book Readers

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EPSON® S1D13522 ISIS Timing

Controller

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EPSON S1D13521 Broadsheet Timing Controller

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Application Processors With Integrated

or Software Timing Controller OMAP

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