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Texas Instruments TPS2047BD
- Part No.:
- TPS2047BD
- Manufacturer:
- Texas Instruments
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2047BD.pdf
- Description:
- IC PWR SWTCH N-CH 1:2/1:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:259
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Product details
Overview
TPS2047BD from Texas Instruments is a triple-channel, current-limited, high-side power-distribution switch with independent enable inputs (EN1–EN3), 70-mΩ N-channel MOSFETs per channel, 250-mA continuous output current per switch, and active-low open-drain overcurrent reporting (OC1–OC3). It operates from 2.7 V to 5.5 V and is used in USB host/hub power management where controlled inrush, short-circuit protection, and thermal shutdown are required.
For engineers reviewing the TPS2047BD datasheet, TPS2047BD pinout, TPS2047BD application, or TPS2047BD equivalent, key selection considerations include per-channel enable logic (active-low), SOIC-16 package footprint, 0.5-A typical current limit, thermal shutdown recovery behavior, and compatibility with USB 2.0 bus-powered hub designs requiring multiple isolated downstream ports.
Technical Context
The TPS2047BD integrates three independent high-side switches, each with internal charge-pump gate drive enabling operation down to 2.7 V input while maintaining fast rise/fall times (0.4–1.5 ms) and minimizing inrush surges. Each channel features dedicated undervoltage lockout (UVLO), current-sense FET-based limiting (0.3–0.7 A trip range), and deglitched OCx outputs with 4–15 ms timeout.
Thermal protection activates at ~135°C junction temperature and recovers at ~125°C with 10°C hysteresis; fault reporting remains asserted until overload removal. The device uses separate IN1 (pins 2, 15, 14) and IN2 (pin 6, 11) inputs to support dual-rail configurations - critical for hybrid self-/bus-powered USB hubs where upstream and downstream rails differ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 2.7 V to 5.5 V - supports USB 5-V rail with margin for drop; enables direct use with 3.3-V systems via level-shifting. |
| Continuous output current | 250 mA per channel - ensures safe operation under sustained load without derating at 85°C ambient. |
| rDS(on) | 70 mΩ typical at 5 V - limits conduction loss to ≤4.4 mW at 250 mA, reducing thermal stress in SOIC-16 package. |
| Current-limit threshold | 0.3 A min / 0.7 A max - provides robust short-circuit tolerance while avoiding nuisance tripping on capacitive loads up to 100 µF. |
| OCx deglitch time | 4–15 ms - suppresses false overcurrent assertions during hot-plug transients or heavy-capacitance turn-on. |
| Supply current (disabled) | ≤2 µA max - minimizes standby power in always-on USB port controllers or battery-backed systems. |
| Operating temperature | –40°C to 85°C ambient - qualified for industrial and embedded computing environments including desktop peripherals. |
Pinout & Package
TPS2047BD is housed in a 16-pin SOIC (D-16) package with 1.27-mm pitch, 10.3-mm × 7.5-mm body, and exposed pad not connected internally. Pin numbering follows standard SOIC convention (pin 1 = top-left corner, counterclockwise).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | GND | Power ground return for all three channels; must be low-inductance connection to minimize noise coupling into OCx signals. |
| 2 | IN1 | Main input rail for OUT1 and OUT2; connects to upstream 5-V USB VBUS or regulated system rail. |
| 3 | EN1 | Active-low enable for IN1→OUT1 path; pulled high externally to keep channel enabled unless controlled by USB controller. |
| 4 | EN2 | Active-low enable for IN1→OUT2 path; allows independent software-controlled power gating of two downstream ports. |
| 6 | IN2 | Secondary input rail for OUT3; supports dual-rail architectures such as hub controller + auxiliary peripheral rail. |
| 7 | EN3 | Active-low enable for IN2→OUT3 path; isolates third downstream port with separate fault domain. |
| 8, 9, 10 | NC | No internal connection - must remain unconnected; no pull-up/down or routing required. |
| 11 | OUT3 | Switched output for IN2 rail; delivers current only when EN3 = low and IN2 ≥2.7 V. |
| 12 | OC3 | Open-drain overcurrent indicator for OUT3; requires external pull-up to monitor fault status independently. |
| 13 | OC2 | Open-drain overcurrent indicator for OUT2; shares no logic with OC1/OC3 - enables per-port fault diagnostics. |
| 14 | OUT2 | Switched output for IN1 rail; electrically isolated from OUT1/OUT3 for fault containment. |
| 15 | OUT1 | Switched output for IN1 rail; primary port for hub controller or high-priority peripheral. |
| 16 | OC1 | Open-drain overcurrent indicator for OUT1; asserted low during overload or thermal shutdown; debounced internally. |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent high-side switches | Enables simultaneous, isolated power control of three USB downstream ports with no shared failure modes. |
| Per-channel active-low enable logic | Matches standard USB hub controller GPIO output polarity, eliminating need for inverters in enumeration firmware. |
| Dual-input rail architecture (IN1/IN2) | Supports hybrid hub designs where controller and auxiliary functions operate from separate 5-V sources - improves fault isolation. |
| Integrated charge pump | Eliminates external components while ensuring full MOSFET enhancement at 2.7 V input - critical for low-voltage USB OTG applications. |
| Thermal shutdown with hysteresis | Prevents latch-up during sustained shorts; automatic recovery at 125°C allows graceful degradation instead of hard failure. |
| Undervoltage lockout (UVLO) | Guarantees switch remains off until input reaches ≥2.5 V - prevents erratic behavior during brownout or hot-insertion ramp-up. |
Applications
| USB Bus-Powered Hub | Industrial USB Peripheral |
|---|---|
|
Use Scenario: A 4-port bus-powered USB 2.0 hub draws power solely from upstream host port and must limit inrush to <100 mA at startup while delivering up to 500 mA total after enumeration. IC Role / Device Role / Timing Role: TPS2047BD acts as per-port power switch, controlling OUT1–OUT3 for three downstream ports with independent enable timing and OCx fault reporting to hub controller. Use Value: Meets USB specification requirements for inrush limiting (via controlled 0.4–1.5 ms rise time) and overcurrent reporting without external circuitry. |
Use Scenario: An industrial barcode scanner with USB interface requires hot-plug resilience, ESD-hardened power sequencing, and fault isolation between imaging sensor, laser driver, and MCU subsystems. IC Role / Device Role / Timing Role: TPS2047BD provides independent power domains: OUT1 powers MCU (EN1), OUT2 powers laser (EN2), OUT3 powers imager (EN3), each with dedicated OCx monitoring. Use Value: Prevents single-point failure - a short in laser circuit disables only OUT2, preserving communication and imaging functionality. |
| Self-Powered Docking Station | Embedded Computing Module |
|
Use Scenario: A laptop docking station with integrated USB 3.0 hub, Ethernet, and display outputs uses local 5-V SMPS but must comply with USB current-limit and fault-reporting rules for downstream ports. IC Role / Device Role / Timing Role: TPS2047BD serves as USB port protector on three legacy USB 2.0 ports, interfacing with host controller via OC1–OC3 to trigger port disable on overcurrent. Use Value: Replaces discrete FET + sense resistor + comparator solutions, reducing BOM count by ≥7 components per port and improving layout density. |
Use Scenario: A fanless edge AI module with USB-C host capability requires selective power delivery to attached peripherals (camera, storage, sensor) while maintaining low standby current (<5 µA). IC Role / Device Role / Timing Role: TPS2047BD gates power to three peripheral slots; EN1–EN3 driven by SoC GPIOs; OC1–OC3 feed interrupt lines for real-time fault handling. Use Value: Achieves ≤2 µA disabled supply current - extends battery life in portable deployments without sacrificing fault visibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-distribution switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2046BD | Dual-channel version in same SOIC-16 package; lacks IN2/OUT3/EN3/OC3 pins and dual-rail capability. | Suitable for 2-port hubs or dual-load systems; cannot support three independent downstream rails. | Select TPS2046BD only when third channel is unnecessary - saves cost and simplifies routing but forfeits flexibility. |
| TPS2055BDBV | Single-channel SOT-23-5 variant with active-high enable; 250-mA rating, 70-mΩ rDS(on), same UVLO/OC specs. | Used in space-constrained single-port applications; requires three discrete units to match TPS2047BD's integration. | Choose TPS2055BDBV for ultra-compact designs where board area outweighs component count and thermal coupling concerns. |
Compared with TPS2046BD and TPS2055BDBV, the TPS2047BD uniquely delivers triple-channel isolation with dual-input rail support in a single SOIC-16 package - essential for compact, standards-compliant USB hubs requiring independent port control and fault reporting without external logic.
Availability
TPS2047BD is available at Aetrix Electronics and suitable for USB host/hub designs, industrial peripheral power management, and embedded computing modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS2047BD 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies with decades of power management innovation.
The TPS204xB family was designed specifically for USB-compliant power distribution - addressing inrush control, per-port current limiting, thermal safety, and fault reporting in host, hub, and peripheral applications.
FAQ
What is the enable logic polarity for TPS2047BD?
The TPS2047BD uses active-low enable inputs: EN1, EN2, and EN3 must be pulled low to turn on their respective power switches (IN1→OUT1, IN1→OUT2, IN2→OUT3). This matches common USB hub controller GPIO output states and eliminates need for external inverters in standard implementations. When any EN pin is high, its associated channel remains fully off with leakage current ≤1 µA.
Does TPS2047BD support dual input rails, and how are they configured?
Yes, TPS2047BD supports dual input rails: IN1 (pin 2) supplies OUT1 (pin 15) and OUT2 (pin 14), while IN2 (pin 6) supplies OUT3 (pin 11). This allows independent power domains - for example, IN1 from USB VBUS and IN2 from a local 5-V regulator - enhancing fault isolation and enabling hybrid self-/bus-powered hub architectures per USB specifications.
How does the overcurrent reporting work on TPS2047BD?
TPS2047BD provides three independent open-drain OCx outputs (OC1–OC3), each asserted low during overcurrent or thermal shutdown on its corresponding channel. Each OCx signal is deglitched with 4–15 ms timeout to prevent false triggers from inrush transients. External pull-up resistors (typically 10 kΩ to 3.3 V or 5 V) are required to interface with microcontroller interrupt pins or status LEDs.
What is the maximum continuous current per channel for TPS2047BD?
The TPS2047BD is rated for 250 mA continuous output current per channel under recommended operating conditions (TA ≤85°C, VI(IN) = 2.7–5.5 V). Its current-limit threshold is specified from 0.3 A minimum to 0.7 A maximum, with typical trip at 0.5 A - providing margin for transient surges while protecting against sustained shorts. Derating applies above 70°C ambient per the dissipation rating table.
Can TPS2047BD be used in USB 3.0 applications?
TPS2047BD is qualified for USB 2.0 power delivery and commonly used in USB 3.0 hubs for backward-compatible downstream ports. It does not manage SuperSpeed data lines, but its per-port switching, inrush control, and fault reporting meet USB 3.0 power-distribution requirements for legacy ports. For native USB 3.0 power switching, TI recommends newer devices like TPD3S014 or TPS6598x series.
TPS2047BD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Type:
- General Purpose
- Number of Outputs:
- 3
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 250mA
- Rds On (Typ):
- 70mOhm
- Input Type:
- Inverting
- Features:
- -
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
TPS2047BD FAQ
1.How can I place an order for TPS2047BD through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2047BD 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 TPS2047BD reliable?
The price and inventory of TPS2047BD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2047BD is usually 5 days.
3.What payment methods are accepted for TPS2047BD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2047BD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2047BD?
TPS2047BD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2047BD 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 TPS2047BD?
For technical support, including TPS2047BD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2047BD requirements.
6.How does Aetrix verify that TPS2047BD is sourced from the original manufacturer or authorized distributors?
All TPS2047BD 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 TPS2047BD meets industry standards.
7.What is the process for return or replacement of TPS2047BD?
All TPS2047BD units undergo pre-shipment inspection (PSI). If there is an issue with TPS2047BD, 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 TPS2047BD part is unused and in its original packaging.
Return procedure for TPS2047BD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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