USB-C PD 3.1 EPR Controller Selection: A 240W Sourcing Guide

A customer last quarter sent over a BOM for a 240W travel charger. Bench-side, the prototype ran 28V into a 140W laptop fine. Production target was a single-port 48V/5A brick. Halfway down the BOM, the line that mattered most read “TBD — looking for PD 3.1 EPR controller, ideally with AVS.” That line is where most 240W projects either get clean or get stuck.

Three years after USB-IF locked PD 3.1 with Extended Power Range, the controller IC market is still uneven. Datasheets promise EPR. Marketing decks promise 240W. In practice, a lot of the parts engineers reach for first only run to 28V (140W) and call it EPR — because technically that is EPR. The handful of ICs that actually negotiate 48V at 5A end-to-end is smaller than any distributor category page suggests.

This guide is the conversation I have with engineers and buyers most weeks: what PD 3.1 EPR really demands at the controller, which ICs are honestly in the 240W club, what shows up at independent distributors versus what is locked behind allocations, and where 240W projects go sideways. Trade-offs for prototype work versus production volume differ — both are below.

What PD 3.1 EPR Actually Changes at the Silicon Level

USB-C PD 3.0 capped at 20V/5A — 100W on a good day. PD 3.1 keeps SPR (Standard Power Range) at the old 5V/9V/15V/20V tiers and bolts on EPR (Extended Power Range) with three new fixed voltages: 28V, 36V, and 48V, all at up to 5A. That is the headline 240W. The full revision history lives in the USB Power Delivery Specification on usb.org, and any controller datasheet should cite the exact spec revision it claims compliance with.

Three things change inside the controller silicon when you cross from SPR to EPR. The chip’s VBUS sense pin, gate drivers, OVP comparator, and CC pull-up logic all need to survive a sustained 48V plus transients without degrading — a PD 3.0 controller spec’d for 24V VBUS tolerance is not a candidate. The protocol stack adds the EPR mode-entry handshake and the EPR_KeepAlive heartbeat; drop the heartbeat and the link falls back to SPR. And EPR introduces AVS (Adjustable Voltage Supply) — different from PPS. PPS lives in SPR and tunes under 21V. AVS lives in EPR, tunes 15V-48V in 100mV steps, and exists primarily so a sink can request the exact voltage that minimizes downstream conversion loss. If your sink is “USB-C straight into a buck converter to a battery pack,” AVS is the difference between 90%+ system efficiency and 80%.

The cable matters too. Every EPR cable must carry an e-marker rated for 50V/5A and declare it during the handshake. A non-EPR cable plugged into an EPR source silently drops back to SPR — the most common reason “the controller works on the bench but only delivers 100W in customer hands.”

The Five Engineering Decisions That Drive IC Selection

Before opening distributor search, answer these five. They eliminate 80% of the catalog.

1. Source or sink? A wall charger or power station is a source. A laptop, monitor, dock, or end-product battery system is a sink. The two are different ICs at different price points. Source controllers are scarcer and pricier; sink controllers are denser and cheaper. Some parts are dual-role (DRP) — useful for docks, overkill for a charger.

2. SPR-only, EPR-28V, or full EPR-48V? A lot of “PD 3.1” parts support EPR mode but cap the highest voltage at 28V (140W). Fine for a 100W-class laptop charger. Not fine if your customer expects 240W. Read past “PD 3.1 EPR” on the front page and look at the maximum advertised PDO. If the largest fixed PDO is 28V, you have a 140W chip.

3. AVS support? If you are charging a battery directly off USB-C, AVS is close to mandatory. If you are running a fixed 48V bus into a downstream converter, AVS is a nice-to-have. If only fixed PDOs are needed, simpler ICs that skip AVS get cheaper.

4. Integration level. Three rough tiers: (a) bare PD protocol controller — bring your own MCU, FETs, current sense; (b) controller plus integrated FETs and protection — drop-in for adapters; (c) MCU-class part with the PD stack as firmware on a Cortex-M0 you can extend. The third tier costs more but lets you ship custom logic without a second MCU.

5. Certification path. USB-IF certification is mandatory for the official USB-C/PD logo. Some chip vendors ship pre-certified firmware so your end product inherits compliance with minimal re-test. Others give you a stack and wish you luck. Decisive for retail consumer chargers; irrelevant for one-off industrial designs.

If you’re a hobbyist or prototype team: pick the most integrated, pre-certified part you can find. Optimize for time-to-first-light. Re-spin to a cheaper BOM in v2.

If you’re production-bound: optimize for AVS, full 48V, and a vendor with a credible second-source story. The sourcing tax on a single-source PD controller during an allocation event is brutal.

The Controller IC Landscape — Who Makes What in 2026

The market segments into four camps.

Western majors. Infineon (which absorbed Cypress’s EZ-PD line), TI, ST, Renesas, OnSemi, and Diodes Incorporated. Their parts cost more, datasheets are long and accurate, and they dominate certified consumer adapter designs. The Cypress EZ-PD lineage is the most-used family in consumer adapters, but be careful with naming: the EZ-PD CCG7DC (CYPD7271) is a dual-port PD 3.1 SPR controller with integrated buck-boost — its output stage tops out around 21V, so the public reference design (REF-CCG7DC-120W-2C) is a 120W dual-port adapter at 100W/port, not an EPR part. Useful for multi-port SPR chargers; not a 240W candidate. Infineon’s EZ-PD PMG1-S3 is an MCU-class part programmable in ModusToolbox, supporting EPR up to 28V/140W with AVS in 100mV steps.

TI’s PD line is split. The widely-stocked TPS25750 and TPS65987D are PD 3.0 — capped at 20V/100W. They are not PD 3.1 EPR controllers, despite often appearing in EPR shortlists. TI’s actual EPR controller is the TPS26750, paired sink-side with the BQ25756 charger for full 240W reference designs. If a vendor sends you a “TI EPR” BOM with a TPS25750 on it, push back.

ST’s most visible USB-C PD parts (STUSB4761 source, STUSB4500 sink) are both PD 3.0; the STUSB4761 is now NRND. ST has been slower to land a fully public PD 3.1 EPR part — for new ST-aligned designs, expect to bridge to a different vendor for the EPR controller itself. Renesas’s R9A02G015 is one of the cleanest “full 240W” stories among Western majors: an MCU-based Type-C Port Manager (TCPM) on an RL78 core, USB-IF Silicon Certified for PD 3.1 SPR/EPR up to 240W, typically paired with the RAA489400 TCPC for the high-voltage analog front end. Pricing sits at the high end. Diodes Incorporated’s AP43771H is popular in adapters but the published variant tops out at 28V (140W).

Asian specialists. Injoinic (IP2736U, IP2738U, IP2756, IP2761), Hynetek (HUSB238A, HUSB253), Weltrend (WT6635 family), Richtek (RT1726), and a long tail of fab-light Shenzhen vendors. These dominate the white-label charger market visible on the Huaqiangbei wholesale floors. The Hynetek HUSB238A is explicitly 48V/240W EPR-capable in I²C mode and ships in volume into the consumer accessory market; the Injoinic IP2756 is widely cited at the 36V/180W EPR tier in public datasheets, with the higher 48V variants generally appearing under separate order codes — verify the suffix before assuming 240W. See our Shenzhen electronics market guide for context on how this supply chain operates. Datasheets are sometimes Chinese-first, certification stories looser, and prices often half or less of the Western equivalents. Viable for a Chinese-domestic SKU; for US/EU-certified product, plan for compliance work.

MCU-plus-firmware approach. Some teams skip dedicated controllers and run the PD stack on a general-purpose MCU with an analog front end — STM32G0/G4 with TCPP0203 transceivers is the textbook example. Engineer-time-expensive, BOM-cheap, and fully flexible. Not recommended unless you have a firmware engineer who has shipped USB before. For broader context on mixed Western/Chinese USB silicon sourcing, see our CH340G/CH340N USB serial bridge sourcing guide.

Reference-design-bound parts. A growing category: ICs technically available but only shipping through a specific reference design at low volumes, with full availability tied to a customer commitment. Treat these as effectively unavailable for prototype work without a direct FAE relationship.

A Comparison Matrix You Can Actually Use

Use this as a starting filter, not a final decision. Always cross-check the specific order code against the latest datasheet revision — vendors fork the same family number into SPR-only, EPR-28V, and EPR-48V variants without renaming the part. BOM lines that say “CYPD72xx” without a full suffix are ambiguous.

Sourcing Reality — What’s Available, What’s Long Lead Times

Three patterns dominate what we see on the desk in 2026.

Mainstream 100W-class parts (PD 3.0, EPR-28V) are largely commodity. Diodes AP43771, Infineon CCG3PA / CCG6, ST STUSB4500, Weltrend WT663x — available, shipping in days, multi-sourced. Authenticity risk low when bought from reputable channels. Our verifying electronic component authenticity guide covers the inspection routine we run on every PD controller line.

True 240W EPR parts (full 48V) are still allocation-influenced. Renesas R9A02G015 + RAA489400, TI TPS26750, and the higher-end Infineon EPR SKUs frequently show extended lead times through authorized channels for new buyers without a forecast — industry sources currently quote multi-month quoted lead times in this segment. Independent distributors carry pockets of inventory diverted from canceled programs or excess from large OEMs. Quality is fine when sourced carefully; price is volatile.

Chinese EPR specialists (Injoinic, Hynetek) are widely available locally, harder remotely. Buying via a US distributor is patchy. Buying via Shenzhen-side independents is fast and cheap, but you inherit responsibility for verifying authenticity and matching the datasheet revision to firmware expectations — counterfeit and re-marked parts in this segment are not unheard of when prices look too good.

For prototype work, default to whatever your design house’s reference design uses. The bring-up cost of switching ICs mid-prototype is far higher than any per-unit savings. For production, the dual-source question is what matters: does your chosen IC have a credible second source at the same package and pinout, and have you verified that second source ships? “Available at three distributors” means nothing if all three source from the same fab. Same discipline we apply to any hard-to-find component.

Common Pitfalls We’ve Seen in PD 3.1 Projects

Confusing “PD 3.1” with “240W.” PD 3.1 is the spec revision; EPR is the optional power range. A part can be “PD 3.1 compliant” and still cap at 100W. Read the maximum source PDO, not the spec banner.

Underspeccing the cable in test. A non-EPR cable silently falls back to SPR. If your bench prototype “won’t go above 100W,” check the cable before debugging the controller. Test with multiple branded e-marker cables, not just the one in the eval kit.

Underrated VBUS-side FETs. 48V at 5A is 240W of real power, with switching transients above 60V. Silicon FETs that worked at 20V get marginal at 48V. We covered the SiC-versus-GaN trade in our SiC vs GaN power semiconductor decision guide — for most 240W adapters, GaN is winning on density.

Ambiguous BOM lines. A line that says “USB PD controller, 240W” gets you a wide spread of guesses. Full part number, package, and revision get you a real number. Our BOM preparation guide covers the format that actually saves time.

FAQ

Is the TPS25750 a PD 3.1 EPR controller?
No. The TPS25750 is a PD 3.0 part, capped at 20V/100W. It supports PPS but not EPR. For TI’s EPR offering, use the TPS26750.

Do I need AVS if my product only charges at fixed voltages?
No. If your sink works fine on 28V, 36V, or 48V fixed PDOs, AVS adds cost and firmware work for no benefit. AVS earns its place when you are charging a battery directly and want to dynamically minimize buck-converter loss.

Can I use a Chinese PD 3.1 EPR controller in a US-certified product?
Yes, but you bear the certification load. The chips themselves are spec-compliant; what you give up versus a Western major is the pre-certified firmware story and a polished English-language compliance support team. Fine for a domestic-China SKU. For US/EU retail, budget the extra time.

What’s the smallest BOM that delivers real 240W from a USB-C source?
At minimum: a PD 3.1 EPR source controller, a high-voltage primary stage (typically a GaN-based dual-switch or active-clamp flyback), a synchronous rectifier on the secondary, an EPR-capable e-marker cable, and protection rated for >50V transients. Reference designs from Infineon, ON Semi, and TI publish complete BOMs for 140-240W class adapters; start from one of those.

How long do PD 3.1 EPR designs take from kickoff to certified production?
For a competent team using a vendor reference design, 4-6 months including USB-IF certification. Clean-sheet without reference IP, double that. The certification queue itself can run 4-8 weeks.

If you have a PD 3.1 EPR design in front of you and the controller line is still TBD, send us the rest of the BOM. We will tell you within four hours which controllers we have authentic stock for, which need 3-5 days, and which ones — given current allocation — genuinely require considering an alternate vendor. 100% authenticity or full refund, applied to the ICs that determine whether your charger ships at 100W or 240W.