Multi-Output Power Supply with VCOM Amplifier for EPD CXLC8955 is a single chip, multi outputs PMIC for Epaper displays. Two PWM converters respectively generate positive and negative voltages which

   产品概述 返回TOPd5c嘉泰姆

The CXLC8955 is a single chip, multi outputs PMIC for Epaper displays. Two PWM converters respectively generate positive and negative voltages which are boosted to higher voltage by two charge pumps for both source and gate drivers. Two integrated power switches are used to disconnect these PWM outputs from load in shutdown mode. All PWM and charge pump output voltages are adjustable by external resistors and their power on/off timings can be individually programmable via I2C interface. One accurate VCOM voltage, for backplane biasing, is adjustable via I2C interface from -0.3V to -2.85V with 10mV per step. The VCOM is capable of sourcing and sinking current, depending on panel condition, at lease 100mA. An external negative temperature coefficient(NTC) resistor is incorporated to sense remote temperature. This remote temperature sensing can be used to monitor the battery’s surface temperature to avoid over heating. The temperature data is mapped from the voltage on TS pin according to a preset conversion table. Approximately every 250ms the CXLC8955 executes the voltage/temperature conversion and stores the temperature date in register in two’s complement format. The CXLC8955 is available in a space saving TQFN5x5 32-pin package and is specified over the -40oC to +85oC extended temperature range.

   产品特点 返回TOPd5c嘉泰姆

· Single Chip Power Management Solution for Epaper Displays d5c嘉泰姆

· Input SupplyVoltage Range: 3.0~5.5V d5c嘉泰姆

· I 2C Series Interface d5c嘉泰姆

· Boost Converter for Positive Rail Base (HVINP) d5c嘉泰姆

· Inverting Buck-Boost Converter for Negative Rail Base (HVINN) d5c嘉泰姆

· Accurate Voltage Tracking between HVINP and HVINN: +50mV d5c嘉泰姆

· Integrated Two Power Switches with Soft-start Control for Source Driver Supply -POS: +15V/120mA -NEG: -15V/120mA d5c嘉泰姆

· Two Charge Pump for Gate Driver Supply d5c嘉泰姆

 -DGVDD: +22V/20mA d5c嘉泰姆

 -DGVEE:-22V/20mA d5c嘉泰姆

· Accurate and Adjustable VCOM Voltage for Panel Backplane Biasing d5c嘉泰姆

- -0.3 to -2.85V/100mA, 10mV per step d5c嘉泰姆

 -8-bit Control d5c嘉泰姆

· Programmable Turn-on/Turn-off Timing in every Output Voltage d5c嘉泰姆

· Remote Temperature Sensing d5c嘉泰姆

· POK Output d5c嘉泰姆

· FAULTOutput d5c嘉泰姆

· Enable Input d5c嘉泰姆

· Current Limit Protection d5c嘉泰姆

· Over Temperature Protection d5c嘉泰姆

· Fault Events Report in Every Output for Easy Debugging d5c嘉泰姆

· 1MHz Fixed PWM Frequency d5c嘉泰姆

· Up to 85% efficiency for the Boost d5c嘉泰姆

· Internal Soft Start Control d5c嘉泰姆

· Available in TQFN5x5-32 Package d5c嘉泰姆

· Halogen and Lead Free Available (RoHS Compliant)d5c嘉泰姆

   应用范围 返回TOPd5c嘉泰姆

· E-paper Displayd5c嘉泰姆

   技术规格书（产品PDF) 返回TOP d5c嘉泰姆

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