Packaging information
| Package | Pins VQFN (RGZ) | 48 |
| Operating temperature range (°C) -10 to 85 |
| Package qty | Carrier 250 | SMALL T&R |
Features for the TPS65186
- Single Chip Power-Management Solution for
E Ink Vizplex Electronic Paper Displays - Generates Positive and Negative Gates, Source
Driver Voltages, and Back-Plane Bias From a
Single, Low-Voltage Input Supply - Supports 9.7 Inch and Larger Panel Size
- 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 V to –5.11 V
- ± 1.5% accuracy (±10 mV)
- 9-Bit Control (10-mV Nominal Step Size)
- Integrated 10-Ω, 3.3-V Power Switch for Disabling
System Power Rail to E-Ink Panel
Description for the TPS65186
The TPS65186 device is a single-chip power supply designed to for E Ink Vizplex displays used in portable e-reader applications, and the device supports panel sizes up to 9.7 inches and greater. Two high-efficiency DC-DC boost converters generate ±16-V rails that 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 that 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 that can be adjusted from 0 V to –5.11 V with 9-bit control through the serial interface; it can also source or sink current depending on panel condition. The TPS65186 supports automatic panel kickback voltage measurement, which eliminates the need for manual VCOM calibration in the production line. The measurement result can be stored in nonvolatile memory to become the new VCOM power-up default value.
TPS65186 is available in a 48-pin 7-mm × 7-mm2 VQFN with 0.5-mm pitch.