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Microchip Technology UCS1002-2-BP
- Part No.:
- UCS1002-2-BP
- Manufacturer:
- Microchip Technology
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
UCS1002-2-BP.pdf
- Description:
- IC USB PORT POWER CTRLR 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:428
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Product details
Overview
UCS1002-2-BP from SMSC is a programmable USB port power controller with integrated charger emulation, designed for precise 2.5 A current switching, BC1.2/CDP/DCP/YD/T-1591/Apple/RIM protocol support, and ultra-low-power attach detection in battery-operated systems like notebooks and docking stations.
For engineers reviewing the UCS1002-2-BP datasheet, UCS1002-2-BP pinout, UCS1002-2-BP application, or UCS1002-2-BP equivalent, this device delivers configurable current limiting, SMBus/I²C-controlled charger profile cycling, VBUS discharge, Battery Full mode, and thermal management - all in a 20-pin QFN 4 mm × 4 mm package.
Technical Context
The UCS1002-2-BP implements a dual-supply architecture (VS for power path, VDD for logic), enabling wake-on-attach functionality from system sleep/off states. Its USB 2.0 high-speed data switch operates in Pass-through and CDP modes with full compliance.
Charger emulation uses nine preloaded profiles plus one customizable stimulus-response sequence for proprietary handshake support. Fault handling supports both latch and auto-recovery modes with low-test-current recovery, and current monitoring provides real-time IBUS measurement via SMBus registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Continuous Current | 2.5 A - enables full USB charging capability for tablets, e-readers, and peripherals without external current-sense amplifiers |
| On-Resistance (RDS(on)) | 55 mΩ - minimizes conduction loss and self-heating during high-current operation |
| Input Voltage Range (VS) | 2.9 V to 5.5 V - supports wide-range USB VBUS and adapter inputs including legacy 5 V ±10% and newer PD-derived rails |
| Charging Protocols | USB-IF BC1.2 CDP/DCP, YD/T-1591 (2009), Apple® (30-pin & Lightning), RIM® - ensures broad compatibility across smartphones and accessories |
| Communication Interface | SMBus 2.0 / I²C - supports block read/write, multiple addresses, and host-controlled profile selection and current monitoring |
| ESD Immunity | IEC61000-4-2 ±8 kV contact / ±15 kV air - meets industrial-grade robustness requirements for exposed USB ports |
| Operating Temperature | −40 °C to +85 °C - qualified for use in consumer and embedded computing environments including docking stations and monitors |
Pinout & Package
UCS1002-2-BP is housed in a RoHS-compliant 20-pin QFN package measuring 4 mm × 4 mm with 0.5 mm pitch and exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Logic supply input | Provides regulated 3.3 V power to internal logic; decoupling required for stable SMBus communication |
| VS | Power path input | Accepts 2.9–5.5 V source; powers USB VBUS output and enables split-supply standby operation |
| PWR_EN | Power switch enable | Active-high control signal; toggling enables/disables VBUS output and initiates soft-start sequence |
| A_DET# | Attach detection output | Open-drain signal asserted low on USB device insertion; supports wake-from-sleep in battery-powered systems |
| ALERT# | Fault alert output | Open-drain indicator for over-current, over-temperature, UVLO/OVLO, or back-drive events |
| DPIN/DMIN | USB upstream data inputs | Connect to host-side D+ and D− lines; routed through internal high-speed switch to DPOUT/DMOUT |
| DPOUT/DMOUT | USB downstream data outputs | Deliver pass-through or charger-emulated signals to attached peripheral; compliant with USB 2.0 HS timing |
| COMM_SEL / ILIM | Mode select / current limit config | Hardware pin selects SMBus vs. stand-alone mode and sets default current limit threshold |
| SEL | Emulation profile select | Binary-encoded input selecting among preloaded charger profiles or enabling custom emulation mode |
| GND | Ground reference | Common return for VS, VDD, and signal paths; must be connected to thermal pad for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Programmable current limit | Configurable via SMBus register or hardware ILIM pin; supports dynamic adjustment based on system load or battery state |
| Custom charger emulation | One user-programmable stimulus-response profile accommodates future or proprietary charging signatures without firmware update |
| Battery Full mode | Enables controlled current delivery during system off/sleep states while preventing excessive battery drain |
| Dynamic thermal management | Reduces output current under high junction temperature to prevent thermal shutdown and maintain reliability |
| VBUS discharge function | Actively discharges VBUS after disconnect to meet USB-IF BC1.2 renegotiation timing requirements |
| Ultra-low-power Detect state | Consumes <10 µA typical during attach detection, enabling multi-week battery life in always-on USB monitoring applications |
Applications
| Notebook Power Management | Docking Station Charging Hub |
|---|---|
Use Scenario: Notebook PC in sleep or off state detects USB peripheral attachment via VBUS sensing. IC Role / Device Role / Timing Role: UCS1002-2-BP acts as attach detector and power controller, asserting A_DET# to wake CPU and enabling VBUS only after valid signature negotiation. Use Value: Eliminates need for separate attach-detection circuitry and enables zero-power wake-up without compromising battery life. |
Use Scenario: Docking station supplies power and data to multiple peripherals including smartphones and tablets. IC Role / Device Role / Timing Role: UCS1002-2-BP manages per-port VBUS switching, emulates DCP/CDP profiles, and enforces current limits to prevent overloading shared 5 V rail. Use Value: Ensures reliable charging across diverse devices while protecting dock power supply from thermal overload or short circuits. |
| AC-DC Wall Adapter w/ Smart Charging | Monitor USB Hub with Fast-Charge Support |
Use Scenario: Single-port wall adapter identifies connected device type and delivers optimal charge current up to 2.5 A. IC Role / Device Role / Timing Role: UCS1002-2-BP replaces discrete resistor networks with programmable emulation, supporting BC1.2, Apple, and YD/T-1591 handshakes. Use Value: Reduces BOM count and enables firmware-upgradable charging logic without changing hardware design. |
Use Scenario: Monitor-integrated USB hub provides charging to keyboards, mice, and mobile devices while maintaining data throughput. IC Role / Device Role / Timing Role: UCS1002-2-BP controls VBUS per downstream port, isolates faults, and maintains USB 2.0 HS signal integrity during active charging. Use Value: Prevents data corruption caused by VBUS noise or ground bounce during high-current charging events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB port power control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS65987D | Integrated USB-C PD controller with 20 V support; lacks native BC1.2 DCP/CDP emulation and requires external resistors for legacy charging | Targeted at USB-C PD designs; not drop-in compatible for USB-A-only systems requiring Apple/YD/T-1591 support | Select when designing new USB-C systems needing programmable PD contract negotiation and higher voltage capability |
| ON Semiconductor NCP380 | Fixed 2.1 A current limit, no charger emulation, no SMBus interface, no attach detection - purely a power switch | Suitable only for basic over-current protection in non-charging USB hubs or peripherals | Choose only if BC1.2/Apple emulation, current monitoring, or wake-on-attach are unnecessary |
Compared with TPS65987D and NCP380, the UCS1002-2-BP uniquely combines legacy USB-A charging protocol support, ultra-low-power attach detection, and SMBus-configurable current limiting - making it irreplaceable in cost-sensitive, battery-aware USB-A host systems requiring broad peripheral compatibility.
Availability
UCS1002-2-BP is available at Aetrix Electronics and suitable for notebook computers, docking stations, and AC-DC wall adapters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for UCS1002-2-BP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
SMSC (Standard Microsystems Corporation), acquired by Microchip Technology in 2012, specialized in connectivity, USB, and embedded control ICs before integration into Microchip's analog and interface portfolio.
The UCS1002 product line was engineered specifically for intelligent USB power delivery in portable and desktop computing platforms - emphasizing low-quiescent-current attach detection, multi-protocol charger emulation, and seamless integration with host SoCs via SMBus.
FAQ
What is the primary function of the UCS1002-2-BP in a USB system?
The UCS1002-2-BP serves as a programmable USB port power controller that manages VBUS switching, enforces current limits up to 2.5 A, detects device attachment in ultra-low-power states, and emulates multiple charging protocols including BC1.2, Apple, and YD/T-1591. It integrates these functions into a single 20-pin QFN package to simplify USB power architecture in host systems.
Does the UCS1002-2-BP support USB 2.0 high-speed data switching?
Yes, the UCS1002-2-BP includes a fully compliant USB 2.0 high-speed data switch that operates in Pass-through and CDP modes. It preserves signal integrity with minimal insertion loss and meets USB-IF HS electrical specifications, enabling simultaneous data transfer and charging without external multiplexers.
How does the UCS1002-2-BP handle over-current conditions?
The UCS1002-2-BP supports two fault-handling modes: latch and auto-recovery. In auto-recovery mode, it enters low-test-current recovery after over-current detection and attempts automatic reset. In latch mode, it disables VBUS until manually cleared via SMBus or PWR_EN toggle. Both modes include dynamic thermal derating to prevent damage.
Can the UCS1002-2-BP operate from a single supply, or does it require split supplies?
The UCS1002-2-BP supports both configurations: VS powers the switching FET and VDD powers the logic. Split supply (e.g., VS = 5 V, VDD = 3.3 V) enables ultra-low-power Detect state operation (<10 µA), while single-supply operation (VS = VDD = 3.3 V) is possible but disables wake-on-attach functionality. The choice depends on system power-state requirements.
What charger emulation profiles are built into the UCS1002-2-BP?
The UCS1002-2-BP includes nine preloaded charger emulation profiles covering USB-IF BC1.2 CDP and DCP, YD/T-1591 (2009), and major Apple and RIM variants. It also provides one fully customizable profile using a unique stimulus-response method, allowing support for proprietary or emerging charging signatures without hardware changes.
UCS1002-2-BP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- USB Dedicated Charging Port (DCP), Power Switch
- Current - Supply:
- 650µA
- Voltage - Supply:
- 2.9V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
UCS1002-2-BP FAQ
1.How can I place an order for UCS1002-2-BP through Aetrix?
Please submit a Request for Quotation (RFQ) for UCS1002-2-BP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for UCS1002-2-BP reliable?
The price and inventory of UCS1002-2-BP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCS1002-2-BP is usually 5 days.
3.What payment methods are accepted for UCS1002-2-BP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCS1002-2-BP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCS1002-2-BP?
UCS1002-2-BP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCS1002-2-BP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for UCS1002-2-BP?
For technical support, including UCS1002-2-BP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCS1002-2-BP requirements.
6.How does Aetrix verify that UCS1002-2-BP is sourced from the original manufacturer or authorized distributors?
All UCS1002-2-BP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that UCS1002-2-BP meets industry standards.
7.What is the process for return or replacement of UCS1002-2-BP?
All UCS1002-2-BP units undergo pre-shipment inspection (PSI). If there is an issue with UCS1002-2-BP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The UCS1002-2-BP part is unused and in its original packaging.
Return procedure for UCS1002-2-BP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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