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.?

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[ CXLC8955 ]"
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产品概述 返回TOP
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TOP
· Single Chip Power Management Solution for Epaper Displays
· Input SupplyVoltage Range: 3.0~5.5V
· I 2C Series Interface
· Boost Converter for Positive Rail Base (HVINP)
· Inverting Buck-Boost Converter for Negative Rail Base (HVINN)
· Accurate Voltage Tracking between HVINP and HVINN: +50mV
· Integrated Two Power Switches with Soft-start Control for Source Driver Supply -POS: +15V/120mA -NEG: -15V/120mA
· Two Charge Pump for Gate Driver Supply
-DGVDD: +22V/20mA
-DGVEE:-22V/20mA
· Accurate and Adjustable VCOM Voltage for Panel Backplane Biasing
- -0.3 to -2.85V/100mA, 10mV per step
-8-bit Control
· Programmable Turn-on/Turn-off Timing in every Output Voltage
· Remote Temperature Sensing
· POK Output
· FAULTOutput
· Enable Input
· Current Limit Protection
· Over Temperature Protection
· Fault Events Report in Every Output for Easy Debugging
· 1MHz Fixed PWM Frequency
· Up to 85% efficiency for the Boost
· Internal Soft Start Control
· Available in TQFN5x5-32 Package
· Halogen and Lead Free Available (RoHS Compliant)
应用范围 返回TOP
· E-paper Display
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产品封装图 返回TOP
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PMIC > LCD Bias Converter |
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Part_No |
Package |
Topology |
Buffer for Vcom |
Switch Current Limit (A) |
Vin (V) |
Fmax Khz |
SYNC ASYNC |
PFM/PSM |
Vref (V) |
R-Top milohm |
Iq(No load) (uA) |
En pin |
POK |
Charge Pump Output |
|
min |
max |
||||||||||||||
TQFN3 x3-20 |
Boos tCharge pump |
Yes |
2 |
2.7 |
5.5 |
1500 |
ASYNC |
PSM/PWM |
1.25 |
500 |
300 |
Yes |
No |
Two set for VGH, VGL |
|
TQFN3 x3-20 |
Boos tCharge pump |
2 |
2.9 |
5.5 |
1000 |
ASYNC |
PSM/PWM |
1.25 |
Yes |
No |
Two set for VGH,VGL |
||||
TQFN5 x5-32 |
Boost Charge pump |
Yes |
1.8 |
3 |
5.5 |
1000 |
ASYNC |
PSM/PWM |
1.25 |
250 |
2000 |
Yes |
No |
Two set for VGH,VGL |
|
WLCSP1.92 x1.28-15 |
Boost Charge pum |
0.6 |
2.5 |
5.5 |
1800 |
SYNC |
PSM/PWM |
540 |
Yes |
No |
Two set for VGH,VGL |