Diodes Incorporated AP43671ZDZ20-13

Overview

AP43671ZDZ20-13 from Diodes Incorporated is a highly integrated USB Type-C Power Delivery 3.0 controller with embedded synchronous rectification (SR) control, MCU-based protocol decoding, OTP firmware storage, and support for Programmable Power Supply (PPS), QC4/QC4+, and e-marker cable detection. It operates from 3V to 21V VCC, delivers 5/9/12V CV regulation with ±0.3% reference accuracy, and integrates OVP/UVP/OCP/SCP/OTP protection with CC1/CC2 short-to-VBUS protection up to 24V - targeting compact, cost-sensitive AC-DC USB PD chargers.

For engineers reviewing the AP43671ZDZ20-13 datasheet, AP43671ZDZ20-13 pinout, AP43671ZDZ20-13 application, or AP43671ZDZ20-13 equivalent, key selection criteria include its embedded SR controller supporting Adaptive QR/CCM modes, 5 mΩ current-sense resistor compatibility, ultra-low 750 µA deep-sleep current, USB-IF TID 4999 certification, and W-QFN4040-20 (Type A1) package with validated thermal resistance of 134 °C/W.

Technical Context

The AP43671ZDZ20-13 implements a dual-domain architecture: a USB PD PHY with BMCTX/RX transceivers and 24V-tolerant CC1/CC2 pins coexist with an adaptive SR controller featuring DISR/VDET sensing, programmable gate drive timing (tR_Gate = 50 ns, tF_Gate = 30 ns), and mode-switching logic between DCM and CCM based on PWM frequency and slew-rate detection.

Its MCU executes protocol stack firmware from OTP memory while managing real-time CV/CC loop control via OCDRV open-drain output, VFB feedback, and built-in 5V LDO (V5V pin), eliminating external CC/CV reference circuitry. Protection logic includes auto-restart SCP with 1–2 s restart interval, 90 ms OVP debounce, and dual-stage CC_OVP: hardware isolation + 3 ms timeout-triggered VBUS reset to 5V.

Key Specifications

Pinout & Package

AP43671ZDZ20-13 is housed in a thermally enhanced W-QFN4040-20 (Type A1) package with 0.5 mm pitch, 4 mm × 4 mm body, and exposed thermal pad. The 20-pin top-view layout supports high-density USB PD charger PCBs with optimized thermal dissipation (θJA = 134 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB PD controller with integrated SR applications.

Compared with MPQ4282-AEC1 and IP2726, the AP43671ZDZ20-13 uniquely combines USB-IF-certified PPS, embedded SR control, and OTP firmware in a single W-QFN4040-20 package - reducing total component count by two and eliminating external flash programming steps in high-volume charger production.

Availability

AP43671ZDZ20-13 is available at Aetrix Electronics and suitable for smartphone fast chargers, notebook wall adapters, USB-C power banks, and multi-port desktop chargers requiring stable component supply, USB-IF certification traceability, and production-ready firmware.

Supply support for AP43671ZDZ20-13 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 analog ICs, specializing in power management, signal integrity, and connectivity solutions for consumer, industrial, and computing markets.

The AP43671 belongs to Diodes' USB Power Delivery product line, engineered specifically for cost-optimized, high-efficiency AC-DC USB-C chargers that require integrated protocol handling, synchronous rectification, and robust safety protection in minimal footprint.

FAQ

What USB PD specifications and fast-charging protocols does AP43671ZDZ20-13 support?

The AP43671ZDZ20-13 supports USB PD3.0 v1.2 with Programmable Power Supply (PPS), Qualcomm QC4 and QC4+ protocols, and legacy BC1.2. It is USB-IF certified with TID 4999 and implements full PD contract negotiation, PDO selection, VCONN power delivery (20 mA), and e-marker cable detection - all executed by its on-chip MCU using firmware stored in OTP memory.

How does the embedded synchronous rectification controller operate across different converter modes?

The AP43671ZDZ20-13's SR controller operates in Adaptive Quasi-Resonant (QR) mode for discontinuous conduction and Continuous Conduction Mode (CCM) for high-load conditions. It uses VDET pin sensing with internal 1.6 kΩ pull-down and DISR-driven gate drive, with MCU-based mode selection triggered by PWM frequency and slew-rate thresholds - enabling seamless transition without external mode-select pins or configuration resistors.

What protection features are integrated, and how do they respond to fault conditions?

Integrated protections include OVP (5.5–16.2 V programmable), UVP (3.8–9.1 V), OCP (30 ms deglitch), SCP (1–2 s auto-restart), OTP (100 µA external NTC bias), and CC1/CC2 short-to-VBUS (24 V tolerant). On OVP trip, it disables PWREN, activates internal VBUS discharge path, and terminates discharge at target voltage; on CC_OVP >7 V for >3 ms, it forces VBUS reset to 5 V and sends Hard Reset to upstream device.

Can AP43671ZDZ20-13 be used without external current-sense amplifiers or voltage references?

Yes. The AP43671ZDZ20-13 eliminates external current-sense amplifiers by supporting direct Kelvin connection to a 5 mΩ shunt resistor referenced to VCC and AGND/S_GND pins. It also removes external voltage references via integrated precision CV references (4.85–5.15 V for 5 V, 8.73–9.27 V for 9 V, 11.64–12.36 V for 12 V) and a built-in 5 V LDO (V5V pin) for SR gate drive - reducing bill-of-materials by up to four passive components.