Diodes Incorporated PI5USB2546AZHEX

Overview

PI5USB2546AZHEX from Diodes Incorporated (acquired Pericom) is a USB 2.0 charging port controller and high-side power switch with integrated D+/D– data-line switching, 73-mΩ R_DS(on), adjustable current limit up to 3 A, BC1.2/CDP/DCP/YD/T1591-2009 compliance, and S3 wake-up support for mouse/keyboard. It targets USB host ports and wall adapters requiring intelligent load detection and multi-mode charging control.

For engineers reviewing the PI5USB2546AZHEX datasheet, PI5USB2546AZHEX pinout, PI5USB2546AZHEX application, or PI5USB2546AZHEX equivalent, key selection criteria include BC1.2-compliant signature generation, S4/S5 charging enablement via /STATUS, programmable current thresholds for load detection, and TQFN-16 package thermal performance in high-capacitance USB port designs.

Technical Context

The PI5USB2546AZHEX implements dual-function control logic: one path handles USB data-line signaling (D+/D– switching and voltage divider-based charger identification), while the other manages power delivery via a high-side MOSFET with overcurrent protection and /STATUS-driven power wake/PPM. Its internal state machine automatically selects between Divider-1A, Divider-2A, DCP-1.2V, and Shorted modes based on connected device behavior.

It operates across 4.5 V to 5.5 V supply range with ultra-low quiescent current (2 μA disabled, 270 μA enabled), enabling always-on S4/S5 charging supervision. The /STATUS pin outputs open-drain signals indicating fault conditions, current-limit status, and port power management states for host microcontroller coordination.

Key Specifications

Pinout & Package

PI5USB2546AZHEX is housed in a thermally enhanced 3.0 mm × 3.0 mm, 16-pin TQFN package with exposed thermal pad (pin 16). The package supports reflow soldering per JEDEC J-STD-020 and provides low thermal resistance for sustained 3 A operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2546RTET and IP2721, PI5USB2546AZHEX uniquely combines BC1.2/YD/T1591 signature generation, integrated D+/D– switching, and S4/S5 load detection in a single TQFN-16 package-enabling minimal-footprint, firmware-free USB-A charging solutions for host systems.

Availability

PI5USB2546AZHEX is available at Aetrix Electronics and suitable for notebook motherboard USB ports, multi-port wall adapters, and industrial USB charging kiosks requiring stable component supply, UL-certified operation, and robust short-circuit resilience.

Supply support for PI5USB2546AZHEX 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 timing portfolio into broad mixed-signal solutions for computing, consumer, and industrial markets.

The PI5USB2546AZHEX belongs to Diodes' USB Power Delivery and Charging Controller product line, designed specifically for host-side USB-A port intelligence-enabling BC1.2-compliant charging, data-path integrity, and system-level power state coordination without firmware dependency.

FAQ

What USB charging standards does PI5USB2546AZHEX support natively?

PI5USB2546AZHEX natively supports USB Battery Charging Specification 1.2 (CDP/DCP), Chinese Telecommunication Standard YD/T1591-2009 (Shorted mode), and three non-BC1.2 modes: Divider-1A, Divider-2A, and DCP-1.2V. It performs automatic mode selection without host MCU intervention or external components.

How does the /STATUS pin function in S4/S5 charging applications?

The /STATUS pin operates as an open-drain output that asserts low during overcurrent events, current-limit activation, or PPM state changes. In S4/S5, it signals load presence to enable auxiliary power supplies and coordinate wake-up sequencing-verified with Intel Platform Environment Control Interface (PECI) and ACPI S4/S5 state transitions.

Can PI5USB2546AZHEX be used with USB 3.0 data lines?

PI5USB2546AZHEX integrates a USB 2.0 high-speed (480 Mbps) D+/D– analog switch only. It does not process or switch USB 3.0 SuperSpeed (5 Gbps) lanes. For USB 3.0 ports, it must be paired with a discrete SS mux; the power switch and BC1.2 functionality remain fully applicable to the 5 V VBUS rail.

What is the thermal performance of the TQFN-16 package at 3 A continuous load?

Under 2-layer PCB conditions (2 oz copper, 1-in² thermal pad area), the PI5USB2546AZHEX TQFN-16 achieves ≤35 °C temperature rise at 3 A continuous load. Thermal derating begins above 85 °C ambient; full 3 A operation is validated up to 70 °C ambient with 1000 µF downstream capacitance.