UCS81003
Automotive USB Port Power Controller with Charger Emulation
Features
• Port Power Switch with Two Current Limit Behaviors
- 2. 9V to 5. 5V Source Voltage Range - Up to 3. 0A Current (2. 85A typical) with
55 m on Resistance - Overcurrent Trip or Constant Current Limiting - Soft Turn-On Circuitry - Programmable Current Limit - Dynamic Thermal Management - Undervoltage and Overvoltage Lockout - Back-Drive, Back-Voltage Protection - Latch or Auto-Recovery (Low Test Current)
Fault Handling - Selectable Active-High or Active-Low Power
Switch Enable - BC1. 2 VBUS Discharge Port Renegotiation
Function
• Selectable/Automatic Cycling of Universal Serial Bus (USB) Data Line Charger Emulation Profiles
- USB-IF BC1. 2 Charging Downstream Port (CDP) and Dedicated Charging Port (DCP) modes, Chinese Telecommunications Industry Standard YD/T 1591-2009 and most Apple® Inc. and RIM® Protocols Standard; others as defined via the SMBus 2. 0/I2C Protocol
- Supports 12W Charging Emulation - USB 2. 0 Compliant High-Speed Data Switch
(in Data Pass-Through, SDP and CDP modes) - Nine Preloaded Charger Emulation Profiles
for Maximum Compatibility Coverage of the Peripheral Devices - One Custom-Programmable Charger Emulation Profile for Portable Device Support for Fully Host-Controlled Charger Emulation
• Supports Active Cables
• Self-Contained Current Monitoring and Rationing for Power-Allocation Applications
• Low-Power Attach Detection and Open-Drain (A_DET#) Pin
• Ultra Low-Power Sleep State
• Optional Split Supply Support for VS and VDD for Low-Power in System Standby States
• Wake on Attach USB • SMBus 2. 0/I2C Communications
- Supports Block Write and Read - Multiple SMBus Addresses
• Wide Operating Temperature Range: -40°C to +85°C
• IEC61000-4-2 8/15 kV Electrostatic Discharge (ESD) Immunity
• Passes Automotive AEC-Q100 Reliability Testing
General Description
The UCS81003 provides a USB port power switch for precise control of up to 3. 0A continuous current (2. 85A typical) with Over...
UCS81003 PDF File
