Dell D220p 01 Power Supply Pinout 2 !!top!! Today

I assume you mean the Dell D220p‑01 laptop power adapter (barrel plug) — here’s the pinout for its 7.4×5.0 mm DC barrel with center pin (typical for Dell laptops):

3. Secondary Connector: The "P4" (4-pin) Mystery

Most guides mention "Pinout 2" referring to the secondary 4-pin connector near the 20-pin. On standard ATX, this is a P4 12V CPU connector. On the D220P-01: Dell D220p 01 Power Supply Pinout 2

The D220P-01 uses a proprietary 8-pin connector that is mechanically similar to an 8-pin EPS12V motherboard connector but uses a completely different electrical layout. I assume you mean the Dell D220p‑01 laptop

(Some units have pin 1,2,3 top row and 4,5,6 bottom row; either way, wire colors are the definitive identifier). Center pin (male, inner contact): +19

Introduction

The Ultimate Guide to the Dell D220P-01 Power Supply Pinout (Revision 2)

Introduction: The Workhorse of the Optiplex Era

If you have ever cracked open a Dell Optiplex GX270, GX280, or an SX280, you have encountered the Dell D220P-01. Manufactured by Delta Electronics (Model number DPS-220PB A), this 220-watt power supply unit (PSU) is a classic example of proprietary OEM engineering. Unlike standard ATX power supplies, the D220P-01 uses a non-standard 20-pin main connector and a unique "sense" wire configuration.

• Center pin (male, inner contact): +19.5 V DC (V+)
• Barrel outer sleeve: Ground (V– / chassis)
• No data/ID pin on the barrel itself — identification for Dell chargers is done inside the adapter connector or via a separate 3‑pin smart plug on some models; the D220p‑01 is a simple two‑contact output.

Compatibility: This unit is the standard replacement for Dell Optiplex models SX280, GX620, 745, 755, and 760.