●Description
●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.
●Features
●• Single-Chip Power Management Solution for E Ink® Vizplex™ Electronic Paper Displays
●• Generates Positive and Negative Gate and Source Driver Voltages and Back-Plane Bias from a Single, Low-Voltage Input Supply
●• 3-V to 6-V Input Voltage Range
●• Boost Converter for Positive Rail Base
●• Inverting Buck-Boost Converter for Negative Rail Base
●• Two Adjustable LDOs for Source Driver Supply
● – LDO1: 15 V, 120 mA (VPOS)
● – LDO2: –15 V, 120 mA (VNEG)
●• Accurate Output Voltage Tracking
● – VPOS - VNEG = ±50 mV
●• Two Charge Pumps for Gate Driver Supply
● – CP1: 22 V, 10 mA (VDDH)
● – CP2: –20 V, 12 mA, (VEE)
●• Adjustable VCOM Driver for Accurate Panel- Backplane Biasing
● – –0.3 V to –2.5 V
● – ±1.5% Accuracy (±18 mV)
● – 8-Bit Control (11-mV Nominal Step Size)
● – 15-mA Maximum Integrated Switch
●• Integrated 3.3-V Power Switch for Disabling System Power Rail
●• Thermistor Monitoring
● – –10°C to +85°C Temperature Range
● – ±1°C Accuracy from 0°C to 50°C
●• I2C Serial Interface
● – Slave Address 0x48h (1001000)
●• Flexible Power-Up Sequencing
●• Interrupt and Sleep Mode Support
●• Thermally-Enhanced Package for Efficient Heat Management (48-Pin 7 mm × 7 mm × 0.9 mm VQFN)
●Applications
●• Power Supply for Active Matrix E Ink Vizplex Panels
●• EPD Power Supply
●• E-Book Readers
●• EPSON® S1D13522 (ISIS) Timing Controller
●• EPSON S1D13521 (Broadsheet) Timing Controller
●• Application Processors With Integrated or Software Timing Controller (OMAP™)
