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RT5081

 2017-02-15

【产品特性】

Battery Charger
• High-Accuracy Voltage/Current Regulation
• Average Input Current Regulation (AICR) : 0.1A to 3.25A in 50mA steps
• Charge Current Regulation Accuracy : ± 7%
• Charge Voltage Regulation Accuracy : ±1% (0 -85°C)
• Battery Temperature Sensing
• Synchronous 1.5Mz/0.75MHz Fixed-Frequency PWM Controller with up to 95% Duty Cycle
• Thermal Regulation and Protection
• Over-Temperature Protection
• Input Over-Voltage Protection
• IRQ Output for Communication via I2C
• Automatic Charging
• BATFET Control to Support Ship Mode, Wake Up,and Full System Reset
• Resistance Compensation from Charger Output to Cell Terminal
• USB OTG Output Voltage Range : 4.4255V to 5.5825V and Output Current : 2A
• D+/D- Detection for BC1.2
• Integrated ADCs for System Monitoring (Charger Current, Voltage, and Temperature,)
• JEITA Thermal Comparator Accuracy ± 1%VTS
• Low Battery Protection from 2.3V to 3.8V for Boost Operation
• Initial VOREG Set for Relieve Battery Protection
• External OVP MOSFET Driving for Higher Surge application, up to AMR 28V

USB_PD
• PD-Compatible Dual-Role
• Attach/Detach Detection as Host, Device or Dual- Role Port
• Current Capability Definition and Detection
• Cable Recognition
• Alternate Mode Supported
• Supports VCONN with Programmable Over-Current Protection (OCP)
• Dead Battery Support
• Ultra-Low Power Mode for Attach Detection (<10μA)
• BIST Mode Supported
• USB PD3.0

Backlight WLED Driver
• Drives up to 8 series WLEDs in 4 Strings
• External PWM Pin and I2C-Controlled with Programmable 11 bits of Linear and Exponential Brightness
• I2C-Programmable Over-Voltage Protection (OVP) Threshold
• Supports Torch Mode and Strobe Mode for Front Cameras
• Auto Switch Frequency Mode (500kHz, 1MHz)
• Four Over-Voltage Protection Thresholds (17V, 21V,25V, and 29V)
• Four Over-Current Protection Thresholds (900mA,1200mA, 1500mA, and 1800mA)
• Front-Facing Flash with 300% Brightness for Selfshot

Flash LED Driver
• Synchronous Boost Dual Flash LED Driver with Dual Independently-Programmable LED Current Sources
• Torch Mode Current : from 25mA to 400mA in 12.5mA Steps per Channel
• I2C-Programmable Flash Safety Timer, from 64ms to 2432ms with 32ms/Step
• Flash LED1/LED2 Short-Circuit Protection, and Output Short-Circuit Protection
• TX Mask Protection with dedicated FL_TXMASK Pin
• Shared Charger/OTG as Power Stage
• Support Auto-Tracking Mode
• Independent Torch Bypass MOSFET from VSYS
• Strobe Mode Current : 50mA to 750mA or 100mA to 1.5A in 12.5mA Steps per Channel, and up to 2.5A in Total

Display Bias Driver
• I2C-Programmable Output Voltages
• Flexible Output Voltages (VBST, VPOS, VNEG) Setting
• Boost Converter Output Voltage (VBST) Range : 4V to 6.15V, 50mV/Step
• Positive Voltage Output (VPOS) Range : 4 to 6V, 50mV/Step
• Negative Voltage Output (VNEG) Range : −4 to −6V,50mV/Step
• Selectable Output Mode (Fast Discharge or Float)when Positive/Negative Voltage Output Disabled
• External Independent Positive/Negative Enable Control
• True Load Disconnect, Over-Current Protection, and Positive/Negative Short-Circuit Protection Function
• Output Current : 50mA
• Power-Saving by Periodic Mode

LDO
• Output Voltage Range : 1.6V to 4V, 200mV/Step
• Output Current : 400mA
• High PSRR and Low Dropout LDO RGB LED Driver

4-Channel LED Driver
• Sink Current for 3 RGB LEDs : 24mA/Channel in 4mA Steps
• PWM Dimming Frequency Range : 0.1Hz to 1kHz
• RGB_ISINK4 for CHG_VIN Power Good Indicator
• Support Register Mode, PWM Mode and Breath Mode

【产品应用】

• Cellular Telephones
• Personal Information Appliances
• Tablet PCs
• Portable Instruments

【文字介绍】

The RT5081 is a highly-integrated smart power management IC, which includes a single cell Li-Ion/Li-Polymer switching battery charger, a USB Type-C & Power Delivery (PD) controller, dual Flash LED current sources, a RGB LED driver, a backlight WLED driver, a display bias driver and a general LDO for portable devices.