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Microchip Technology UCS1001-1-BP-TR
- Part No.:
- UCS1001-1-BP-TR
- Manufacturer:
- Microchip Technology
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
UCS1001-1-BP-TR.pdf
- Description:
- IC USB PORT POWER CTRLR 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,829
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Product details
Overview
UCS1001-1-BP-TR from Microchip (formerly SMSC) is a USB port power controller with integrated charger emulation, designed for host-side USB power management in portable device charging applications. It delivers up to 2.5 A continuous current with 55 mΩ on-resistance, supports BC1.2 CDP/DCP, Apple®, and YD/T-1591 protocols, and features a dedicated CHRG# open-drain output indicating active charging. Used in notebook PCs and docking stations for intelligent VBUS control and legacy device compatibility.
For engineers reviewing the UCS1001-1-BP-TR datasheet, UCS1001-1-BP-TR pinout, UCS1001-1-BP-TR application, or UCS1001-1-BP-TR equivalent, this page provides verified technical context, exact pin functions, real-world USB charging mode behavior, thermal management implementation, and validated alternative options for system-level power architecture design.
Technical Context
The UCS1001-1-BP-TR implements dual-mode current limiting-trip shutdown or constant-current regulation-with dynamic thermal management that reduces switch conduction to maintain safe junction temperature. Its USB 2.0 high-speed data switch operates in Pass-through and CDP modes, maintaining <1.5 dB insertion loss up to 480 MHz while supporting BC1.2 renegotiation via VBUS discharge.
It integrates nine preloaded charger emulation profiles-including BC1.2 DCP, CDP, SDP, and seven legacy Apple/RIM signatures-and uses M1/M2/EM_EN inputs to select active mode. The CHRG# output asserts low during confirmed charge enable, distinct from the A_DET# signal used in the UCS1001-2 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Continuous Current | 2.5 A - enables full-power charging of BC1.2-compliant tablets and smartphones without external FETs |
| On-Resistance (RDS(on)) | 55 mΩ - minimizes voltage drop and thermal dissipation at 2.5 A (ΔV = 137.5 mV, Ploss = 344 mW) |
| Input Voltage Range (VS) | 2.9 V to 5.5 V - supports direct connection to USB VBUS or regulated 3.3 V/5 V rails |
| Charger Emulation Profiles | 9 preloaded - covers USB-IF BC1.2 CDP/DCP, YD/T-1591, and major Apple® (1A/2.1A/2.4A) and RIM® signatures |
| ESD Immunity | IEC61000-4-2 ±8 kV contact / ±15 kV air - ensures robustness against user-handling ESD in end-product enclosures |
| Operating Temperature | –40 °C to +85 °C - qualified for industrial and mobile computing environments including laptop docks and monitors |
| Package | 20-pin QFN 4 mm × 4 mm - surface-mount footprint compatible with automated PCB assembly and thermal pad grounding |
Pinout & Package
UCS1001-1-BP-TR is housed in a lead-free, RoHS-compliant 20-pin QFN package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. The package supports reflow soldering per JEDEC J-STD-020 and requires PCB thermal land per Figure 9.4 in the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBUS1 / VBUS2 | Power switch output | Parallel high-current outputs tied together; deliver switched VBUS to downstream port; rated for 2.5 A continuous |
| VS1 / VS2 | Power switch input | Input supply pins for power FET; accept 2.9–5.5 V; support split-supply operation with VDD for ultra-low sleep current |
| CHRG# | Open-drain status output | Asserts low when charger emulation profile is accepted and charging is active; requires external pull-up |
| ALERT# | Open-drain fault indicator | Asserts low on over-current, over-temperature, UVLO/OVLO, or back-drive condition; latched or auto-recovery per LATCH pin |
| PWR_EN | Active-high/low enable input | Controls power switch gate; polarity selectable via SEL pin; enables system-level power sequencing |
| M1 / M2 / EM_EN | Mode configuration inputs | Select among Data Pass-through, BC1.2 SDP/CDP/DCP, or Dedicated Charger Emulation Cycle |
| DPOUT / DMOUT | USB data line emulation drivers | Generate BC1.2/Apple signature voltages on D+ and D−; not data-passing in DCP/DCE modes |
| DPIN / DMIN | USB data path inputs | Connect to upstream host D+/D−; routed through internal HS switch only in Pass-through and CDP modes |
Key Features
| Feature | Design Value |
|---|---|
| BC1.2 VBUS discharge function | Enables port renegotiation by discharging VBUS to <0.4 V within 100 ms, satisfying USB-IF CDP handshake timing requirements |
| Dynamic thermal management | Reduces effective current limit and modulates switch duty cycle before thermal shutdown, preventing system-level brownouts during sustained 2.5 A load |
| Selectable fault handling | Latch or auto-recovery mode (via LATCH pin) allows either persistent fault blocking or low-test-current retry-critical for unattended docked systems |
| Split-supply standby support | VDD and VS can be independently powered, enabling <10 µA sleep current while retaining attach detection capability in notebook lid-close states |
| Back-drive and back-voltage protection | Prevents reverse current flow from downstream device into host VBUS rail and blocks >6 V reverse voltage on VBUS pins |
Applications
| USB-C Docking Station Power Management | Notebook PC Charging Port Controller |
|---|---|
Use Scenario: A multi-port USB-C dock supplies power and data to laptops, phones, and peripherals while managing simultaneous charging across ports. IC Role / Device Role / Timing Role: UCS1001-1-BP-TR acts as the primary VBUS switch and charger emulator for legacy USB-A ports, coordinating with PD controllers on USB-C ports. Use Value: Enables backward-compatible 2.5 A charging on USB-A ports using BC1.2 and Apple signatures, eliminating need for discrete charger ID ICs. |
Use Scenario: A clamshell notebook detects peripheral attachment during S3/S5 sleep and wakes to initiate fast charging. IC Role / Device Role / Timing Role: UCS1001-1-BP-TR monitors VBUS in Detect State, asserts CHRG# upon valid signature acceptance, and maintains low-power wake signaling. Use Value: Achieves sub-10 µA sleep current with attach detection-extending battery life in lid-closed state without sacrificing charge readiness. |
| Desktop Monitor USB Hub Charger | AC-DC Wall Adapter with USB-A Output |
Use Scenario: An all-in-one monitor includes USB-A ports that must charge phones and tablets at full speed while passing USB 2.0 data to connected peripherals. IC Role / Device Role / Timing Role: UCS1001-1-BP-TR configures as BC1.2 CDP to allow concurrent 1.5 A charging and high-speed data transfer via its integrated USB 2.0 switch. Use Value: Eliminates separate data switch and charger ID ICs-reducing BOM count and PCB area while meeting USB-IF compliance. |
Use Scenario: A compact wall adapter delivers 5 V/2.4 A to smartphones using non-USB-host circuitry, requiring reliable legacy device recognition. IC Role / Device Role / Timing Role: UCS1001-1-BP-TR operates in Dedicated Charger Emulation (DCE) mode, cycling through 9 preloaded profiles until device accepts charge. Use Value: Delivers >95% legacy device compatibility (including older Apple models) without firmware updates or microcontroller overhead. |
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 |
|---|---|---|---|
| TUSB246IRHBR | Single-chip USB Type-C port controller with PD 3.0 support; no native BC1.2 DCP/CDP emulation; requires external power switch | Designed for USB-C source applications only; lacks legacy Apple/YD/T-1591 signature support | Choose for new USB-C designs needing PD negotiation; not suitable for USB-A BC1.2/legacy charging retrofit |
| TPS65987D | USB-C PD controller with integrated 5 V/3 A buck-boost; supports BC1.2 via GPIO-driven resistor networks-not hardware-emulated signatures | Requires external analog switches and firmware logic to emulate legacy chargers; higher system complexity | Use when full USB-C PD 3.0 + programmable VBUS is required; avoid when deterministic, zero-firmware BC1.2/Apple support is mandatory |
Compared with TUSB246IRHBR and TPS65987D, the UCS1001-1-BP-TR provides hardware-native BC1.2 CDP/DCP and Apple signature generation without MCU intervention, making it optimal for cost-sensitive, firmware-light USB-A charging ports where guaranteed legacy device compatibility is critical.
Availability
UCS1001-1-BP-TR is available at Aetrix Electronics and suitable for notebook computers, docking stations, and AC-DC adapters requiring stable component supply, long-lifecycle support, and guaranteed BC1.2/Apple charging interoperability.
Supply support for UCS1001-1-BP-TR 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
Microchip Technology acquired SMSC in 2012 and maintains full support for the UCS1001 family, including datasheets, application notes, and long-term manufacturing commitments.
The UCS1001 product line was engineered specifically for USB host-side power control and legacy charger emulation in space-constrained, thermally sensitive computing platforms-prioritizing hardware-based protocol compliance over software configurability.
FAQ
What is the key functional difference between UCS1001-1-BP-TR and UCS1001-2-BP-TR?
The UCS1001-1-BP-TR provides a CHRG# open-drain output that asserts low when a portable device has accepted a charger emulation profile and entered active charging. In contrast, the UCS1001-2-BP-TR outputs A_DET# to indicate physical attachment detection only-without confirming charge enable. This makes UCS1001-1-BP-TR ideal for systems requiring precise charge-state feedback, such as smart docks that throttle host CPU activity during charging.
Does UCS1001-1-BP-TR support USB 2.0 high-speed data pass-through, and under what conditions?
Yes, UCS1001-1-BP-TR supports USB 2.0 high-speed (480 Mbps) data pass-through only in Data Pass-through mode and BC1.2 CDP mode. In these modes, the internal high-speed analog switch connects DPIN→DPOUT and DMIN→DMOUT with <1.5 dB insertion loss up to 480 MHz. It does not pass data in DCP or Dedicated Charger Emulation modes-where DPOUT/DMOUT are repurposed for signature generation.
How does the dynamic thermal management feature operate in UCS1001-1-BP-TR?
UCS1001-1-BP-TR continuously monitors die temperature and, when approaching thermal regulation threshold, automatically reduces effective current limit and modulates switch conduction-rather than triggering immediate shutdown. This maintains partial functionality (e.g., 1.2 A instead of 2.5 A) during sustained high-load conditions, avoiding abrupt disconnects that could corrupt USB enumeration or file transfers.
Can UCS1001-1-BP-TR be used in a standalone wall adapter without a USB host controller?
Yes. UCS1001-1-BP-TR operates autonomously in Dedicated Charger Emulation (DCE) mode, cycling through its nine preloaded profiles-including BC1.2 DCP, Apple 1A/2.1A/2.4A, and YD/T-1591-until a connected device responds. No host processor, firmware, or USB protocol stack is required, making it suitable for fixed-function AC-DC adapters targeting broad legacy device compatibility.
What is the purpose of the split-supply support (VS and VDD) in UCS1001-1-BP-TR?
Split-supply support allows VS (power switch rail) to remain active while VDD (logic rail) is powered down-enabling ultra-low sleep current (<10 µA) while retaining VBUS monitoring and attach detection capability. This is essential for notebook platforms that must detect peripheral insertion during S3/S5 sleep states without waking the main SoC, thereby extending battery life in lid-closed scenarios.
UCS1001-1-BP-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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)
UCS1001-1-BP-TR FAQ
1.How can I place an order for UCS1001-1-BP-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for UCS1001-1-BP-TR 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 UCS1001-1-BP-TR reliable?
The price and inventory of UCS1001-1-BP-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCS1001-1-BP-TR is usually 5 days.
3.What payment methods are accepted for UCS1001-1-BP-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCS1001-1-BP-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCS1001-1-BP-TR?
UCS1001-1-BP-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCS1001-1-BP-TR 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 UCS1001-1-BP-TR?
For technical support, including UCS1001-1-BP-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCS1001-1-BP-TR requirements.
6.How does Aetrix verify that UCS1001-1-BP-TR is sourced from the original manufacturer or authorized distributors?
All UCS1001-1-BP-TR 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 UCS1001-1-BP-TR meets industry standards.
7.What is the process for return or replacement of UCS1001-1-BP-TR?
All UCS1001-1-BP-TR units undergo pre-shipment inspection (PSI). If there is an issue with UCS1001-1-BP-TR, 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 UCS1001-1-BP-TR part is unused and in its original packaging.
Return procedure for UCS1001-1-BP-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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