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UCS2112

Dual USB Power Switch with Integrated Current Sensor

Status: Not Recommended for new designs

Features:

  • 3.0A continuous current per VBUS port with 40 mΩ On resistance per switch
  • Independent port power switch enable pins
  • Dual fault ALERT# active drain output pins
  • Constant Current or Trip mode current limiting behaviors
  • Undervoltage, overvoltage lockout, back-drive, back-voltage protection
  • Auto-recovery fault handling with low test current
  • BOOST# logic output to increase DC-DC converter output under large load conditions
  • A_DET# open-drain outputs for device attach detection per port
  • Eight programmable current limits assignable to each power switch
  • Other SMBus addresses available upon request
  • Block read and block write
  • 4x4 mm 20-pin QFN
  • Self-contained current monitoring (no external sense resistor required)
  • Fully programmable per-port charge rationing and behaviors
  • Per-port BC1.2 VBUS Discharge Function
  • -40°C to +105°C
  • UL recognized and EN/IEC 60950-1 (CB) Certified
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The UCS2112 is a dual USB port power switch configuration which can provide 3.0A continuous current (3.4A maximum) per VBUS port.  The UCS2112 is well suited for both stand-alone and applications having SMBus/I2C communications. 

For applications with SMBus, the UCS2112 provides per-port current monitoring and eight programmable current limits per switch, ranging from 0.53A to 3.0A continuous current (3.4A maximum). Per-port charge rationing is also provided ranging from 3.8 mAh to 246.3 Ah. 

In Stand-alone mode, the UCS2112 provides eight current limits for both switches, ranging from 0.53A + 0.53A to 3A + 3A total continuous current.
Both power switches include an independent VBUS discharge function and constant current mode current limiting for BC1.2 applications.

Please consider this device UCS2113

Additional Features
    • Dual-Port Power Switches:
      • 3.0A continuous current per VBUS port with 40 mΩ On resistance per switch
      • Independent port power switch enable pins
      • Dual fault ALERT# active drain output pins
      • Constant Current or Trip mode current limiting behaviors
      • Undervoltage, overvoltage lockout, back-drive, back-voltage protection
      • Auto-recovery fault handling with low test current
      • BOOST# logic output to increase DC-DC converter output under large load conditions
      • A_DET# open-drain outputs for device attach detection per port
    • SMBus 2.0/I2C™ Mode Features:
      • Eight programmable current limits assignable to each power switch
      • Other SMBus addresses available upon request
      • Block read and block write
    • 4x4 mm 20-pin QFN
    • Self-contained current monitoring (no external sense resistor required)
    • Fully programmable per-port charge rationing and behaviors
    • Per-port BC1.2 VBUS Discharge Function
    • -40°C to +105°C
    • UL recognized and EN/IEC 60950-1 (CB) Certified
Parametrics
Name
Value
Product Type
USB Power Dist
Type
Dual
Vin Min (V)
2.9
Vin Max (V)
5.5
Adj Current Limit
Yes
Current Limit Adj# (Max)
3.4A
Current Limited
Yes
RDS ON @5V (mΩ)
40
Enable Logic
Active Low, Active High
Rev Block Diode
Yes
UVLO
Yes
Thermal Shutdown
Yes
Fault Flag
Yes
Flag Transient Filter
Yes
UL Approved
Yes

Documents

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Data Sheets

Errata

Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
UCS2112 Dual USB Port Power Eval Board
UCS2112 Dual USB Port Power Eval Board ( ADM00639 )

The UCS2112 Dual USB Port Power Evaluation Board demonstrates the features of two USB ports, capable of data transfer and charging up to 6A. Charging limits, accumulated current, alerts and attachment status can all be configured, exercised and/or observed on a graphical user interface.

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
UCS2112-1-V/G4
0.043100
0.076923
20
QFN
4x4x0.9mm
Matte Tin
e3
UCS2112-1-V/G4-V01
0.043100
0.076923
20
QFN
4x4x0.9mm
Matte Tin
e3
UCS2112-2-V/G4
0.043100
0.076923
20
QFN
4x4x0.9mm
Matte Tin
e3
UCS2112T-1-V/G4
0.043100
0.212121
20
QFN
4x4x0.9mm
Matte Tin
e3
UCS2112T-1-V/G4-V01
0.043100
0.212121
20
QFN
4x4x0.9mm
Matte Tin
e3
UCS2112T-2-V/G4
0.043100
0.212121
20
QFN
4x4x0.9mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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