Datasheet

PS2251-33 Datasheet PDF – USB 2.0 Flash Controller

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Part Number: PS2251-33

Function: USB 2.0 Flash Controller

Package: 48-pins / 64-pins QFP Package

Manufacturer: Phison Electronics

Image:

PS2251-33 datasheet

 

Description

PHISON’s PS2251-33 USB-to-Flash micro-controller supports the latest 5Xnm/4Xnm 8K page flash memories and 3 bit-per-cell flash memories. It is the ideal solution to support readyboost feature in Windows Vista. The entire firmware is upgradable thanks to the addition of Programmable RAM, allowing host design flexibility. This chip is specially designed for USB flash disk, USB Disk-On-Module, and embedded applications found in PC motherboard, UMPC, and other portable devices.

Pinout

components

Controller Features

1. Support Host Interfaces : USB 2.0 & 1.1 Interface

(1) Fully compatible with USB Specification Version 2.0 & 1.1

(2) High speed 480Mbit/second supporting

(3) Full speed 12Mbit/second supporting

(4) Support one CONTROL transfer, one INTERRUPT transfer and two BULK transfer

2. Support In-System Programming through USB Port

3. Buffer SRAM : 16 buffers for performance improvement

4. Build-in regulator

5. USB bus-powered capability.

6. Power Saving implemented.

Block Diagram

PS2251-33 block diagram

Other data sheets are available within the file: PS2251

PS2251-33 Datasheet PDF Download

PS2251-33 pdf

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EGP10F Datasheet – 1A, 300V, Rectifier, Diode ( PDF )

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Part Number: EGP10F

Function: 1A, 300V, Glass Passivated High Efficiency Rectifier

Package: DO-41 Type

Manufacturer: ON Semiconductor

Image and Pinouts:

EGP10F datasheet

Description

EGP10F is a high-efficiency, ultrafast recovery rectifier diode rated for 1A average current and 300V reverse voltage. It is optimized for high-frequency switching applications where low switching loss and fast recovery are critical.

Features

  • Superfast recovery time (typically tens of ns range)
  • Low forward voltage drop (improves efficiency)
  • Low reverse leakage current
  • High surge current capability
  • High reliability under switching stress

Functional Characteristics

  • Designed for fast switching → minimizes reverse recovery losses
  • Suitable for high-frequency SMPS topologies
  • Better efficiency compared to standard rectifier diodes
  • Handles repetitive switching stress in inductive environments

Comparison with Other Diodes

  • Standard Rectifier (e.g., 1N4007): Slow (µs range), unsuitable for high frequency
  • Fast Recovery Diode: Improved, but slower than EGP series
  • Ultrafast (EGP10F): Ideal for tens to hundreds of kHz SMPS
  • Schottky: Lower VF but lower voltage rating (typically <200V)

Design Considerations

  • Use in high-frequency switching nodes (flyback, forward converters)
  • Minimize loop inductance to reduce voltage spikes
  • Ensure adequate thermal dissipation (PCB copper area)
  • Consider snubber network if high dv/dt ringing occurs
  • Verify reverse recovery softness for EMI performance

Typical Applications

  • Switch Mode Power Supplies (SMPS)
  • Freewheeling / flyback diodes
  • DC/DC converters
  • Snubber and clamp circuits
  • High-frequency rectification

Equivalent / Alternative Parts

  • UF4004 ~ UF4007 (ultrafast rectifiers, similar class)
  • FR107 (fast recovery diode, slower alternative)
  • HER108 (high efficiency rectifier)
  • MUR110 / MUR120 (higher performance ultrafast diodes)

Other data sheets are available within the file:

EGP10A, EGP10B, EGP10C, EGP10D

 

EGP10F Datasheet PDF Download


EGP10F pdf