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Diodes Incorporated PI5USB2546QZHEX
- Part No.:
- PI5USB2546QZHEX
- Manufacturer:
- Diodes Incorporated
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
PI5USB2546QZHEX.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:1 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
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Product details
Overview
PI5USB2546QZHEX from Diodes Incorporated (formerly Pericom) is an AEC-Q100 qualified USB charging port controller and high-side power switch with integrated USB 2.0 data-line (D+/D−) switching, 73-mΩ RDS(on), adjustable current limit up to 2.5 A, load detection for S4/S5 charging, and support for BC1.2 CDP/DCP, Chinese YD/T1591 Shorted Mode, Divider-1A/2A, and DCP-1.2V charging protocols. It enables automotive-grade USB host ports with mouse/keyboard wake-up capability.
For engineers reviewing the PI5USB2546QZHEX datasheet, PI5USB2546QZHEX pinout, PI5USB2546QZHEX application, or PI5USB2546QZHEX equivalent, key selection criteria include BC1.2 compliance assurance, dual current-limit threshold configuration via ILIM_HI/ILIM_LO resistors, /STATUS-driven port power management in multi-port systems, and thermal shutdown at 170°C with 20°C hysteresis.
Technical Context
The PI5USB2546Q integrates a 73-mΩ high-side MOSFET power switch with programmable overcurrent protection, two independent current-limit thresholds (set by external resistors on ILIM_HI and ILIM_LO), and a dedicated load-detection circuit that asserts /STATUS for S4/S5 charging control and port power management. Its logic-controlled CTL1–CTL3 pins configure charging mode (CDP, DCP, Divider-1A/2A) without firmware intervention.
It embeds a high-bandwidth analog switch for USB 2.0 D+/D− lines with ≤4 Ω on-resistance, <0.15 Ω channel mismatch, 2 GHz bandwidth, and >52 dB off-state cross-talk isolation - enabling transparent data pass-through during active charging. The device supports automatic SDP/CDP switching and power-wake functionality triggered by low/full-speed USB peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 5.5 V - ensures compatibility with regulated 5 V USB power rails under worst-case tolerance and drop conditions. |
| RDS(on) | 73 mΩ (typ.) - minimizes conduction loss and self-heating at 2 A output, supporting continuous operation in thermally constrained automotive cabins. |
| Adjustable Current Limit | Up to 2.5 A (typ.) - set via external resistors on ILIM_HI/ILIM_LO, enabling precise tailoring for different downstream device classes (e.g., 550 mA for load detect, 2.5 A for fast-charging tablets). |
| USB Data Switch Bandwidth | 2.0 GHz (−3 dB) - preserves USB 2.0 HS signal integrity (480 Mbps) with <0.25 ns propagation delay and <0.2 ns skew between D+/D− paths. |
| Load Detection Threshold | 650 mA (typ.) rising - triggers /STATUS for S4/S5 charging enablement and multi-port port-power arbitration without host CPU involvement. |
| Thermal Shutdown | 170 °C with 20 °C hysteresis - prevents latch-up during sustained overload or ambient temperature excursions in enclosed automotive enclosures. |
| Quiescent Current | 270 μA (enabled), 2 μA (disabled) - meets automotive standby power budgets for always-on USB ports in ignition-off states. |
Pinout & Package
Package: TQFN-16L (3.0 mm × 3.0 mm, 0.5 mm pitch) with exposed thermal pad internally connected to GND for PCB heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power input | 5 V supply input; requires ≥0.1 μF ceramic decoupling capacitor placed adjacent to pin for stable switching and EMI suppression. |
| 2 DM_OUT / 3 DP_OUT | USB 2.0 data output (to host controller) | High-bandwidth analog switch outputs; routed directly to USB PHY with controlled impedance traces to maintain signal integrity. |
| 4 ILIM_SEL | Current-limit mode select | Logic input selecting between low-threshold (ILIM_LO) and high-threshold (ILIM_HI) current limits - tied to IN or GND, no pull resistor needed. |
| 5 EN | Global enable | Active-high logic input disabling both power switch and data switches; drives OUT into discharge state when low. |
| 6–8 CTL1–CTL3 | Charging mode control | Three logic inputs configuring BC1.2 mode (CDP/DCP), Divider-1A/2A, or DCP-1.2V - direct connection to MCU GPIO or fixed voltage rails. |
| 9 STATUS | Load detection flag | Active-low open-drain output asserted when load current exceeds threshold; used for S4/S5 wake and multi-port PPM coordination. |
| 10–11 DP_IN / DM_IN | USB 2.0 data input (from downstream connector) | High-isolation inputs accepting micro-USB connector signals; tolerate ±15 mA DCP-mode short-circuit currents per spec. |
| 12 OUT | Switched power output | Delivers regulated 5 V to downstream port; includes internal discharge path (500 Ω typ.) for safe hot-plug removal. |
| 13 FAULT | Fault indicator | Active-low open-drain output asserted on overtemperature or overcurrent; debounced with 5–12 ms deglitch for noise immunity. |
| 14 GND | Ground reference | Main signal and power ground; must be connected to exposed thermal pad for thermal performance and EMI control. |
| 15 ILIM_LO / 16 ILIM_HI | Current-limit resistor terminals | Analog inputs setting low/high current thresholds; resistor values determine trip points (e.g., 80.6 kΩ → 625 mA; 20 kΩ → 2.51 A). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 2 qualification | Validated for −40 °C to +105 °C ambient operation with full electrical characterization - suitable for under-hood and infotainment USB host applications. |
| Dual programmable current-limit thresholds | Independent ILIM_LO and ILIM_HI resistor inputs allow simultaneous configuration of load-detect threshold (e.g., 650 mA) and overcurrent cutoff (e.g., 2.5 A), eliminating external comparators. |
| Integrated USB 2.0 data switch | 2 Ω typical on-resistance, <0.15 Ω D+/D− mismatch, and 52 dB cross-talk isolation ensure bit-error-free 480 Mbps data transfer while charging. |
| S4/S5 charging support with /STATUS | /STATUS assertion enables system-level power sequencing - e.g., enabling 5 V rail only when valid load is detected, reducing standby leakage in sleep states. |
| Mouse/keyboard wake-up capability | Supports low-speed and full-speed USB peripheral wake events from S3 state without host enumeration - critical for automotive accessory power management. |
Applications
| Automotive Infotainment USB Host | Universal Wall Adapter Controller |
|---|---|
|
Use Scenario: USB Type-A port in center console providing charging and data sync for smartphones and tablets. IC Role / Device Role / Timing Role: Charging port controller and power distribution switch managing BC1.2 negotiation, current limiting, and D+/D− signal routing. Use Value: Enables single-port support for Apple, Samsung, and legacy Android devices via auto-detected CDP/DCP/Divider modes while maintaining USB 2.0 HS data throughput. |
Use Scenario: Dual-port wall charger where one port delivers 5 V/2.4 A and the other 5 V/1.0 A with independent load management. IC Role / Device Role / Timing Role: Load-detection power switch coordinating port enablement and current allocation using /STATUS and /FAULT signals. Use Value: Prevents total output overload by disabling secondary port when primary port draws >650 mA, ensuring UL-compliant thermal safety. |
| Notebook Docking Station Port | Industrial USB Hub with Charging |
|
Use Scenario: Powered USB-C dock with legacy Type-A ports delivering BC1.2-compliant charging to peripherals. IC Role / Device Role / Timing Role: High-side power switch and charging signature generator handling automatic SDP-to-CDP transition upon device attachment. Use Value: Eliminates need for host-side software polling - CDP mode activates within 200 ms of plug-in, enabling immediate 1.5 A charging. |
Use Scenario: Factory-floor USB hub powering barcode scanners, RFID readers, and industrial tablets with reliable hot-swap capability. IC Role / Device Role / Timing Role: Robust power switch with 73-mΩ RDS(on), 170°C thermal shutdown, and 6 kV HBM ESD protection on USB pins. Use Value: Survives repeated 500 V surge events and 100,000+ hot-plug cycles due to integrated discharge path and fault-deglitched /FAULT output. |
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 |
|---|---|---|---|
| TUSB214IRWBR | Single-channel USB 2.0 repeater with integrated 5 V switch; no BC1.2 charging logic or load detection; 3.3 V I/O only. | Lacks CDP/DCP signature generation, /STATUS-based PPM, and automotive qualification - limited to data-only hubs. | Select when only signal integrity extension is required, not intelligent charging control. |
| TPS2546RTET | USB charging detector + 115-mΩ switch; supports BC1.2 but no Divider modes or YD/T1591 Shorted Mode; no integrated D+/D− switch. | Requires external analog switch for data path; lacks /STATUS-driven S4/S5 wake; rated for commercial (0–70 °C), not automotive. | Choose for cost-sensitive consumer docks where AEC-Q100 and multi-standard charging are not required. |
Compared with TUSB214IRWBR and TPS2546RTET, the PI5USB2546QZHEX uniquely combines AEC-Q100 qualification, full BC1.2 + YD/T1591 + Divider-mode support, integrated high-bandwidth data switching, and dual-threshold load detection - making it the only solution for automotive-qualified, single-chip USB host port controllers requiring both data and intelligent charging.
Availability
PI5USB2546QZHEX is available at Aetrix Electronics and suitable for automotive infotainment systems, universal wall charging adapters, and industrial USB docking stations requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for PI5USB2546QZHEX 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 integrates its high-performance interface and power management portfolio into automotive, industrial, and computing solutions.
The PI5USB2546Q belongs to Diodes' USB Power Delivery and Charging Controller product line, designed specifically for robust, standards-compliant USB host port implementation in thermally demanding and safety-critical environments.
FAQ
What USB charging standards does the PI5USB2546QZHEX support?
The PI5USB2546QZHEX supports USB Battery Charging Specification 1.2 (CDP/DCP), Chinese Telecommunication Industry Standard YD/T1591-2009 (Shorted Mode), and non-BC1.2 modes including Divider-1A, Divider-2A, and DCP-1.2V. It automatically detects and applies the correct D+/D− signature without host intervention, verified across 20+ popular smartphone and tablet models.
How is load detection implemented and what is its design purpose?
Load detection uses an internal comparator monitoring OUT current against a user-set threshold (650 mA typ.) via ILIM_LO resistor. When exceeded, /STATUS asserts low to signal valid load presence - enabling S4/S5 charging enablement and port power arbitration in multi-port systems. The 200 ms detection window and 3 s reset time prevent false triggers from transient inrush.
Can the PI5USB2546QZHEX operate without external resistors on ILIM_HI and ILIM_LO?
Yes. ILIM_LO and ILIM_HI are optional inputs; if left unconnected, default current-limit thresholds apply (240 mA and 2.51 A respectively). However, precise tuning for specific load profiles - such as 550 mA for S4/S5 wake detection and 2.5 A for tablet charging - requires 80.6 kΩ and 20 kΩ resistors as specified in the datasheet.
What is the role of the /FAULT and /STATUS pins, and how do they differ?
/FAULT is an active-low open-drain output asserting during overtemperature (>170 °C) or overcurrent events, debounced with 5–12 ms deglitching. /STATUS is also active-low open-drain but signals load detection only - used for power sequencing and port arbitration. Both require 10 kΩ pull-up resistors; neither drives high, and both sink up to 10 mA.
PI5USB2546QZHEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 16-WFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- Not Required
- Current - Output (Max):
- 2.5A
- Rds On (Typ):
- 73mOhm
- Input Type:
- Non-Inverting
- Features:
- Status Flag
- Fault Protection:
- Current Limiting (Adjustable), Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
PI5USB2546QZHEX FAQ
1.How can I place an order for PI5USB2546QZHEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI5USB2546QZHEX 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 PI5USB2546QZHEX reliable?
The price and inventory of PI5USB2546QZHEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI5USB2546QZHEX is usually 5 days.
3.What payment methods are accepted for PI5USB2546QZHEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI5USB2546QZHEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI5USB2546QZHEX?
PI5USB2546QZHEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI5USB2546QZHEX 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 PI5USB2546QZHEX?
For technical support, including PI5USB2546QZHEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI5USB2546QZHEX requirements.
6.How does Aetrix verify that PI5USB2546QZHEX is sourced from the original manufacturer or authorized distributors?
All PI5USB2546QZHEX 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 PI5USB2546QZHEX meets industry standards.
7.What is the process for return or replacement of PI5USB2546QZHEX?
All PI5USB2546QZHEX units undergo pre-shipment inspection (PSI). If there is an issue with PI5USB2546QZHEX, 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 PI5USB2546QZHEX part is unused and in its original packaging.
Return procedure for PI5USB2546QZHEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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