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Diodes Incorporated PI5USB2549WAEX
 Exposed Pad.jpg)
- Part No.:
- PI5USB2549WAEX
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
PI5USB2549WAEX.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,125
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Product details
Overview
PI5USB2549WAEX from Diodes Incorporated (formerly Pericom) is a USB charging port controller and high-side power switch with integrated 65-mΩ MOSFET, programmable current limit up to 3A, /STATUS pin for plug-in detection, and support for BC1.2 DCP, YD/T 1591-2009 Shorted Mode, Divider-1A/2A/2.4A, and DCP-1.2V charging schemes - deployed in vehicle USB chargers and AC-DC wall adapters.
For engineers reviewing the PI5USB2549WAEX datasheet, PI5USB2549WAEX pinout, PI5USB2549WAEX application, or PI5USB2549WAEX equivalent, key selection criteria include its ±7% current-limit accuracy at 2.51A, 4.5–5.5V operating range, EP-SOP8L package with exposed thermal pad, and automatic multi-mode DCP detection state machine enabling interoperability across legacy and modern portable devices.
Technical Context
The PI5USB2549WAEX implements an autonomous DCP auto-detection state machine that sequences through Divider-1A → DCP-1.2V → BC1.2 shorted mode upon device attachment, with MODE_SEL pin enabling or disabling Divider-2.4A mode. It integrates UVLO (4.1V typ.), thermal shutdown (170°C), and output discharge (2.0s typ.) for safe hot-plug recovery.
Its charging controller block delivers precise voltage signatures on DP_IN/DM_IN: 2.0V/2.7V (Divider-1A), reversed 2.7V/2.0V (Divider-2A), dual 2.7V (Divider-2.4A), and 1.25V (DCP-1.2V), with output impedances of 7.5–16 kΩ and shorted-mode resistance ≤125 Ω - all verified per BC1.2 and YD/T 1591-2009 compliance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 5.5 V - ensures compatibility with standard 5V USB power rails including automotive transients and wall adapter ripple. |
| On-Resistance (RDS(on)) | 65 mΩ typ. at 25°C - minimizes conduction loss and thermal rise under 2.5A continuous load. |
| Current Limit Accuracy | ±7% at 2.51A typ. - enables reliable overcurrent protection without excessive derating in high-volume charger designs. |
| Plug-In Detection Threshold | 55 mA rising / 45 mA falling - provides robust load sensing across varying cable capacitance and connector contact resistance. |
| Charging Mode Support | BC1.2 DCP, YD/T 1591-2009 Shorted, Divider-1A/2A/2.4A, DCP-1.2V - covers >95% of legacy and mainstream smartphones, tablets, and wearables. |
| Thermal Shutdown | 170°C with 20°C hysteresis - prevents latch-up during sustained overload while allowing recovery after cooling. |
| Output Discharge Time | 2.0 s typ. - ensures full VOUT collapse before renegotiation, avoiding handshake conflicts with attached devices. |
Pinout & Package
PI5USB2549WAEX is housed in an EP-SOP8L package with exposed thermal pad for enhanced power dissipation in compact USB charger PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ILIM | Current-limit set input | Connects external resistor (16.9–750 kΩ) to program precise current threshold from 205 mA to 3.17 A. |
| 2 IN | Main power input | Accepts 4.5–5.5 V supply; requires local 0.1 µF // 10 µF ceramic decoupling for stable switching operation. |
| 3 /STATUS | Active-low plug-in indicator | Open-drain output asserted low when load current exceeds 55 mA - used for microcontroller interrupt or LED enable. |
| 4 MODE_SEL | Charging mode control | Logic-high enables Divider-2.4A mode; logic-low restricts to Divider-1A/2A - allows hardware-selectable fast-charge capability. |
| 5 DP_IN | USB D+ line interface | Bi-directional I/O providing BC1.2-compliant voltage signatures (e.g., 2.0 V, 2.7 V, or 1.25 V) for DCP negotiation. |
| 6 DM_IN | USB D− line interface | Bi-directional I/O paired with DP_IN to generate required D+/D− voltage differentials per charging protocol. |
| 7 OUT | Switched power output | Delivers regulated 5V to USB port; features internal discharge path and constant-current limiting during overload. |
| 8 GND + Exposed PAD | Power and signal ground | Primary ground return path; exposed thermal pad must be soldered to PCB copper for thermal management and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-Detect Charging State Machine | Seamlessly transitions between Divider-1A → DCP-1.2V → BC1.2 DCP modes without firmware intervention - reduces BOM count and MCU overhead. |
| Programmable Current Limit | Configurable from 205 mA to 3.17 A via single external resistor - supports diverse output power tiers (5W to 15W) using one footprint. |
| Integrated Output Discharge | 2.0 s typical hold time ensures complete VOUT collapse before re-enabling - eliminates data-line handshake glitches during reconnection. |
| High-Voltage Tolerance on DP_IN/DM_IN | Withstands up to IN+0.3 V or 5.7 V - protects against USB data-line ESD and transient coupling in noisy automotive environments. |
| 6 kV HBM ESD on USB Pins | Robust electrostatic discharge immunity on DP_IN, DM_IN, and OUT pins - meets IEC 61000-4-2 Level 4 for production-ready reliability. |
Applications
| Vehicle USB Power Charger | AC-DC Wall Adapter with USB Port |
|---|---|
Use Scenario: Integrated into 12V-to-5V automotive USB charging modules powering smartphones and tablets in dash-mounted or cigarette-lighter adapters. IC Role / Device Role / Timing Role: USB charging port controller and high-side power switch managing load detection, current limiting, and D+/D− signaling for BC1.2/YD/T 1591-2009 compliance. Use Value: Enables single-chip implementation of multi-standard fast charging without MCU firmware, reducing cost and qualification time for Tier-1 automotive suppliers. | Use Scenario: Embedded in compact 5V/2.4A wall adapters for consumer electronics, supporting simultaneous charging of multiple devices with adaptive current allocation. IC Role / Device Role / Timing Role: Load-detection power switch and charging protocol negotiator delivering accurate current limiting and plug-in status to system controller. Use Value: Eliminates need for discrete current-sense amplifiers and level-shifters while maintaining ±7% current accuracy across temperature - improving efficiency and thermal margin. |
| USB Hub with Charging Ports | Industrial Docking Station |
Use Scenario: Used in self-powered USB 2.0 hubs with dedicated charging downstream ports (CDPs), where each port must independently negotiate charging current with attached peripherals. IC Role / Device Role / Timing Role: Independent port controller providing isolated D+/D− signaling, current limiting, and /STATUS feedback per port. Use Value: Supports concurrent BC1.2 DCP and Divider-2.4A handshakes across multiple ports - enabling true "smart" hub functionality without host-side software coordination. | Use Scenario: Deployed in ruggedized docking stations for medical tablets and handheld HMIs requiring reliable hot-plug detection and overload protection in factory-floor environments. IC Role / Device Role / Timing Role: Robust power switch and load monitor interfacing with industrial-grade USB connectors subject to frequent insertion/removal and ESD exposure. Use Value: 6 kV HBM ESD rating on DP_IN/DM_IN/OUT and 170°C thermal shutdown ensure uninterrupted operation despite repeated mechanical stress and electrical noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB charging port controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2549RTET | Higher RDS(on) (100 mΩ), fixed 2.4A current limit, no Divider-2.4A mode, requires external pull-up resistors for D+/D− | Lacks auto-detection sequencing and DCP-1.2V support; limited to BC1.2 and proprietary modes | Choose when design prioritizes TI ecosystem integration and simplified layout over multi-standard flexibility. |
| IP5306 | Integrated Li-ion charger + power bank controller; no USB data-line signaling; only supports basic 5V/2.1A output | Not a drop-in replacement - targets portable power banks, not host-side charging ports | Select only for battery-backed USB power delivery where D+/D− negotiation is unnecessary. |
Compared with TPS2549RTET and IP5306, PI5USB2549WAEX uniquely combines BC1.2 auto-detection, DCP-1.2V, Divider-2.4A, and ±7% current accuracy in EP-SOP8L - making it optimal for universal AC/DC and automotive USB chargers requiring zero-firmware, multi-protocol compliance.
Availability
PI5USB2549WAEX is available at Aetrix Electronics and suitable for vehicle USB power chargers, AC-DC wall adapters, USB hubs with charging ports, and industrial docking stations requiring stable component supply and long-term lifecycle support.
Supply support for PI5USB2549WAEX 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
Diodes Incorporated acquired Pericom Semiconductor in 2017 and maintains its legacy high-performance analog and interface product lines, including USB power delivery and signal integrity solutions.
The PI5USB2549WAEX belongs to Pericom's USB charging controller family, designed specifically for host-side USB ports needing seamless interoperability with legacy and modern portable devices without MCU dependency.
FAQ
What is the function of the /STATUS pin?
The /STATUS pin is an active-low open-drain output that asserts low when load current exceeds 55 mA (rising threshold), indicating a valid USB device connection. It remains low until current falls below 45 mA (falling threshold), providing hysteresis to prevent chatter during marginal loads. This pin directly interfaces with microcontrollers or LEDs for plug-in indication without external circuitry.
How does MODE_SEL affect charging behavior?
When MODE_SEL is pulled HIGH, the PI5USB2549WAEX enables Divider-2.4A mode and automatically switches to it if detected load current exceeds 1.8 A. When MODE_SEL is LOW, Divider-2.4A is disabled, and the device operates only in Divider-1A or Divider-2A modes. This pin allows hardware-selectable fast-charge capability without firmware changes.
Can PI5USB2549WAEX be used without an external microcontroller?
Yes - the PI5USB2549WAEX operates autonomously using its integrated state machine to detect and negotiate charging protocols (BC1.2 DCP, Divider-1A/2A/2.4A, DCP-1.2V) without MCU intervention. Only passive components (ILIM resistor, decoupling caps) and MODE_SEL logic level are required for full functionality in standalone charger designs.
What is the maximum continuous output current?
The maximum continuous output current is 2.5 A, defined by the recommended operating condition table. While the current limit can be programmed up to ~3.17 A (with 16.9 kΩ ILIM resistor), sustained operation above 2.5 A requires careful thermal design due to RDS(on) heating and junction temperature limits (125°C max operating, 170°C shutdown).
PI5USB2549WAEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Type:
- USB Switch
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 4.5V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- -
- Current - Output (Max):
- 2.5A
- Rds On (Typ):
- 65mOhm
- Input Type:
- -
- Features:
- Status Flag
- Fault Protection:
- Current Limiting (Adjustable), Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
PI5USB2549WAEX FAQ
1.How can I place an order for PI5USB2549WAEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI5USB2549WAEX 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 PI5USB2549WAEX reliable?
The price and inventory of PI5USB2549WAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI5USB2549WAEX is usually 5 days.
3.What payment methods are accepted for PI5USB2549WAEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI5USB2549WAEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI5USB2549WAEX?
PI5USB2549WAEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI5USB2549WAEX 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 PI5USB2549WAEX?
For technical support, including PI5USB2549WAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI5USB2549WAEX requirements.
6.How does Aetrix verify that PI5USB2549WAEX is sourced from the original manufacturer or authorized distributors?
All PI5USB2549WAEX 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 PI5USB2549WAEX meets industry standards.
7.What is the process for return or replacement of PI5USB2549WAEX?
All PI5USB2549WAEX units undergo pre-shipment inspection (PSI). If there is an issue with PI5USB2549WAEX, 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 PI5USB2549WAEX part is unused and in its original packaging.
Return procedure for PI5USB2549WAEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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