PD & Fast Charge Protocol Simulator

Accurately simulate proprietary protocols and PDO voltage steps across brands. Supports QC backward compatibility, D+/D- masking tests, and JSON imports.

Source (100W)

Mask D+/D- Pins

Sink (100W)

Negotiated State / Active Handshake

100 W

PD(20V / 5A)

Cable Bottleneck: Both devices support up to 100W, but the Standard 5A Cable caps current at 5A, dropping final output to 100W.

Charger

Rated Max Output (W)

PD 100W20V / 5A

PPS 105W3.3-21V / 5A

AVS 240W3.3-48V / 5A

Mi-Charge 120W20V / 6A

SUPERVOOC 100.1W11V / 9.1A

VFC 100W20V / 5A

SCP 100W20V / 5A

UFCS 65W3.3-20V / 3.25A

QC5 100W3.3-20V / 5A

QC4 33W3.3-11V / 3A

QC3.0 36W3.3-12V / 3A

QC2.0 18W12V / 1.5A

FCP 18W9V / 2A

AFC 15W9V / 1.67A

APPLE 12W5V / 2.4A

BC1.2 7.5W5V / 1.5A

Device

Rated Max Input (W)

PD 100W20V / 5A

PPS 105W3.3-21V / 5A

AVS 240W3.3-48V / 5A

Mi-Charge 120W20V / 6A

SUPERVOOC 100.1W11V / 9.1A

VFC 100W20V / 5A

SCP 100W20V / 5A

UFCS 65W3.3-20V / 3.25A

QC5 100W3.3-20V / 5A

QC4 33W3.3-11V / 3A

QC3.0 36W3.3-12V / 3A

QC2.0 18W12V / 1.5A

FCP 18W9V / 2A

AFC 15W9V / 1.67A

APPLE 12W5V / 2.4A

BC1.2 7.5W5V / 1.5A

PMIC Protocol Negotiation Priority (Drag to reorder)

Mi-Charge

SUPERVOOC

VFC

SCP

UFCS

AVS

PPS

QC5

QC4

QC3.0

QC2.0

FCP

AFC

APPLE

BC1.2

Why isn't my iPhone 18 Pro / Pro Max using AVS?

Your charger advertises AVS support, so why isn’t AVS enabled? The devil is in the details.
Under PD 3.2, AVS must appear before PPS in the PD capabilities message. Some chargers place AVS between two PPS entries, which may prevent the phone from negotiating AVS and cause it to fall back to fixed-voltage PD.

AVS comes before all PPS entries

The order meets the requirements. The phone can negotiate an AVS profile and enable 18V fast charging.

Negotiated protocolAVS 18V 3A

Voltage: 18.00V
Current: 2.85A
Power: 51.30W

SOURCE CAPABILITIES

Charger capabilities · 100W

7 PDOs

#TYPEVOLTAGEMAX A

1Fixed5 V3 A

2Fixed9 V3 A

3Fixed15 V5 A

4Fixed20 V5 A

59–20 V5 A

6PPS5–11 V5 A

7PPS5–20 V5 A

Compliant order

Fast Charging Tech & Cable Bottlenecks

High Voltage Approach (Standard PD/PPS)Devices using standard protocols keep power between 30W–65W by raising voltage (15V, 20V) while keeping current under 3A. Because current load on the cable is low, almost any standard Type-C cable (even without an E-Marker chip) can deliver up to 60W.

High Current Proprietary ApproachTo break past 100W without phone step-down heat, brands use low-voltage, high-current specs (e.g., 11V / 9A). This exceeds Type-C's native 5A physical limit, requiring thick custom copper wires and detection pins. Standard cables will trigger safety fallbacks down to basic slow charging.

Fixed Voltage vs Dynamic Protocols (PPS / AVS)

Standard PD and legacy protocols use Fixed PDOs (5V, 9V, 15V, 20V). PPS (Programmable Power Supply) allows devices to dynamically request micro-adjustments in 20mV steps, drastically reducing thermal losses inside the phone. The newer AVS (Adjustable Voltage Supply) in PD 3.1 enables high-voltage dynamic adjustments between 15V and 48V for high-power devices.

Why does my 100W charger only supply 15W? (PDO Mismatch)

Fast charging is about 'Voltage (V) × Current (A)', not just total wattage. If a device asks for 9V/5A (PPS) for 45W charging, but your 100W charger only supports 20V/3.25A on PPS, it can't deliver 5A. Handshaking fails, falling back to basic 9V/1.67A (15W) slow charging due to incomplete PDO profiles.

Note: This page is for theoretical simulation. Real charging rates depend on battery level, thermal controls, and cable losses.
Charger and device protocol handshakes are for reference and may differ from real hardware behavior.