Diodes Incorporated PI5USB2546AQZHEX

Overview

PI5USB2546AQZHEX from Diodes Incorporated is an AEC-Q100 qualified USB charging port controller and high-side power switch with integrated USB 2.0 high-speed data-line (D+/D−) switching. It delivers dual-channel current limiting (up to 2.5 A), supports BC1.2 CDP/DCP, YD/T 1591 Shorted Mode, and four non-BC1.2 modes (Divider-1A/2A/2.4A, DCP-1.2V), and features 73 mΩ typical R_DS(on), load detection for S4/S5 charging, and mouse/keyboard wake-up in automotive and computing USB ports.

For engineers reviewing the PI5USB2546AQZHEX datasheet, PI5USB2546AQZHEX pinout, PI5USB2546AQZHEX application, or PI5USB2546AQZHEX equivalent, this device serves as a system-level USB power management solution requiring precise current-limit configuration, BC-compliant signature generation, load-detect–triggered power control, and robust short-circuit protection in host/hub and wall adapter designs.

Technical Context

The PI5USB2546AQZHEX integrates a 73 mΩ high-side MOSFET power switch, a bidirectional USB 2.0 analog switch (2 Ω typical on-resistance, 2 GHz bandwidth), and a programmable charging controller that autonomously selects among six charging modes via CTL1–CTL3 and ILIM_SEL logic inputs. Its dual current-limit architecture enables independent threshold setting for load detection (550–765 mA) and overcurrent protection (205 mA to 3.17 A).

It implements two distinct power management functions: Power Wake (for S4/S5 charging control via /STATUS) and Port Power Management (PPM) in multi-port systems. The device asserts /FAULT on overtemperature (>170°C) or current-limit violation, and /STATUS on load detection-both open-drain outputs with 100 mV max V_OL at 1 mA sink.

Key Specifications

Pinout & Package

Package: TQFN-16L (3.0 mm × 3.0 mm, 0.5 mm pitch), thermally enhanced with exposed pad internally connected to GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB charging port controller and power switch applications.

Compared with TPS65987D and IP5306, the PI5USB2546AQZHEX uniquely combines AEC-Q100 qualification, hardware-based multi-standard charging mode selection, integrated USB 2.0 HS switching, and dual-purpose /STATUS for both load detection and deep-sleep power management-making it optimal for automotive and industrial USB host/hub designs requiring zero-firmware, high-reliability power arbitration.

Availability

PI5USB2546AQZHEX is available at Aetrix Electronics and suitable for automotive infotainment hubs, notebook docking stations, and universal wall charging adapters requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 compliance.

Supply support for PI5USB2546AQZHEX 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 is a global manufacturer of discrete semiconductors and integrated circuits, specializing in high-performance, high-reliability solutions for automotive, industrial, and computing markets.

The PI5USB2546AQZHEX belongs to Diodes' USB Power Delivery and Charging Controller product line, designed specifically for robust, standards-compliant USB port power management in environments demanding AEC-Q100 qualification and minimal firmware dependency.

FAQ

What charging standards does the PI5USB2546AQZHEX support without external firmware?

The PI5USB2546AQZHEX supports USB Battery Charging Specification 1.2 (CDP/DCP), Chinese Telecommunications Standard YD/T 1591-2009 (Shorted Mode), and four non-BC1.2 modes-Divider-1A, Divider-2A, Divider-2.4A, and DCP-1.2V-all implemented in hardware via CTL1–CTL3 and ILIM_SEL logic inputs. No microcontroller or firmware is required for mode selection or signature generation.

How does the /STATUS pin function in S4/S5 power management?

The /STATUS pin is an active-low open-drain output asserted when load current exceeds the programmable threshold (550–765 mA). In S4/S5 states, it directly controls external power supplies or PMIC enable lines to activate port power only when a valid charging load is detected-enabling energy-efficient deep-sleep charging without host CPU involvement.

Can the PI5USB2546AQZHEX replace discrete USB switches and current-limit ICs in a single-chip solution?

Yes-the PI5USB2546AQZHEX integrates a 2 Ω USB 2.0 high-speed analog switch, a 73 mΩ high-side power switch, a multi-mode charging controller, and dual-threshold current-limit circuitry. It eliminates the need for separate USB signal switches, current-sense amplifiers, and BC1.2 signature generators in host/hub and adapter designs.

What is the thermal performance limit under continuous 2.5 A load in the TQFN-16L package?

At 2.5 A output and 25°C ambient, the PI5USB2546AQZHEX exhibits ~1.2 W conduction loss (I²R = 2.5² × 0.073 Ω), resulting in ~45°C junction rise above ambient with standard 2-layer PCB copper pour. Thermal shutdown activates at 170°C junction temperature, with 20°C hysteresis, ensuring safe operation under sustained overload or poor heatsinking.