TPS65186RGZT

The TPS65186 is a single-chip power supply designed specifically to power E Ink Vizplex displays in portable e-reader applications. This device supports display sizes of 9.7 inches and above. Two high-efficiency DC-DC boost converters generate ±16V rails. These two rails are then boosted to 22V and –20V respectively via two charge pumps, providing gate driver power for the Vizplex display. Two tracking LDOs generate ±15V source driver power, supporting output currents up to 120mA. All voltage rails are adjustable via I²C to accommodate specific display requirements. The device provides a precise backplane bias voltage through a linear amplifier, with 9-bit control of the voltage value via a serial interface, adjustable from 0V to –5.11V. It also features sink/source current capability to accommodate varying display conditions. The TPS65186 supports automatic display transition voltage measurement, eliminating the need for manual VCOM calibration on the production line. Measurement results are stored in non-volatile memory and become the new VCOM power-on default value.

Applications

• Power supply for active matrix E Ink Vizplex displays
• EPD power supply
• E-book readers
• EPSON S1D13522 (ISIS) timing controller
• EPSON S1D13521 (wide-format print) timing controller
• Application processors with integrated or software timing controllers (OMAP)

Key features

• Supports display sizes of 9.7 inches and above
• Input voltage range: 3V to 6V
• Boost converter for positive rail base
• Inverting buck-boost converter for negative rail base
• LDO1: 15V, 120mA (VPOS); LDO2: –15V, 120mA (VNEG)
• Accurate output voltage tracking
• Two charge pumps for gate drive supply
• CP1: 22V, 10mA (VDDH); CP2: –20V, 12mA (VEE)
• Adjustable VCOM driver for precise panel backplane bias voltage
• 0V to –5.11V accuracy ±1.5% (±10mV), 9-bit control (nominal step size 10mV)
• Integrated 10Ω, 3.3V power switch for disabling system power rails to E-Ink displays