Microchip UCS81003 Bruksanvisning
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UCS81003
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2014-2022 Microchip Technology Inc. and its subsidiaries DS20005334C-page 1
UCS81003
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/I
2C 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 Overcurrent Limit (OCL), dynamic
thermal management, latch or auto-recovery (low-test
current) fault handling, selectable active-low or active-
high enable, undervoltage and overvoltage lockout,
back-drive protection and back-voltage protection.
Split supply support for VS and VDD is an option for low
power in system standby states. This gives battery-
operated applications (such as on-board computers)
the ability to detect attachments from a Sleep or OFF
state. After the Attach Detection is flagged, the system
can decide to wake-up or provide charging, or both.
In addition to Power Switching and Current Limiting
modes, the UCS81003 automatically charges a wide
variety of portable devices, including USB-IF BC1.2,
YD/T-1591 (2009), most Apple Inc. and RIM, and many
others. Nine preloaded charger emulation profiles
maximize the compatibility coverage of the peripheral
devices. Additionally, a customizable charger
emulation profile is available to accommodate unique
existing and future portable device
handshaking/signature requirements.
The UCS81003 also provides current monitoring to
enable intelligent management of system power and
charge rationing for controlled delivery of current,
regardless of the host power state. This is especially
important for battery-operated applications to provide
power and not to excessively drain the battery.
The UCS81003 is available in a 5 mm x 5 mm
28-pin VQFN package.
The UCS81003 is AEC-Q100 qualified for automotive
applications.
Applications
• DC Power Socket Replacement
• Consumer USB Port Protection
• Consumer Device Charging Port
• Auxiliary Box Charging Feature
• Rear Seat Entertainment Consumer Access Point
Automotive USB Port Power Controller with Charger Emulation
UCS81003
DS20005334C-page 2
2014-2022 Microchip Technology Inc. and its subsidiaries
Package Type
M2
VBUS
VS1
VS3
VS2
M1
NC
VBUS2
VBUS3
PWR_EN
NCSEL
NC
NC
SMDATA/LATCH
SMCLK/S0
ALERT#
DPIN
DMIN
EM_EN
A_DET#
DPOUT
DMOUT
NC
COMM_SEL/ILIM
VDD
NC
GND
1
2
3
4
5
6
7 15
8
9
10
11
12
13
14
16
17
18
19
20
21
26
25
24
23
22
28
27
EP-29
* Includes Exposed Thermal Pad (EP); see Table 3-1.
UCS81003
5 x 5 VQFN*
2014-2022 Microchip Technology Inc. and its subsidiaries DS20005334C-page 3
UCS81003
Block Diagram
Charger Control,
Measurement,
OCL
Interface,
Logic
COMM_SEL/I
LIM
ALERT#
A_DET#
PWR_EN
SEL
EM_EN
M1
M2
SMCLK/S0
SMDATA/LATCH
Power
Switch
Temp
DPOUT
DMOUT
DPIN
VDD
VSVBUS
DMIN
GND
USB 2.0 HS Data Switch
& Charger Emulator
Attach Detector
VDD
VDD
UVLO,
OVLO
Produktspecifikationer
| Varumärke: | Microchip |
| Kategori: | Inte kategoriserad |
| Modell: | UCS81003 |
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