Pinout

IRF4905 PDF Datasheet – P-Ch, 55V, 74A, MOSFET

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Part Number: IRF4905

Function: P-Channel, -55V, -74A, MOSFET, Transistor

Package: TO-220C Type

Manufacturer: Inchange Semiconductor

Images:IRF4905 pdf pinout

Description

IRF4905 is P-Channel MOSFET Transistor.

Features

1. Advanced Process Technology

2. Ultra Low On-Resistance

3. Dynamic dv/dt Rating

4. 175°C Operating Temperature

5. Fast Switching

6. P-Channel

7. Fully Avalanche Rated Description

8. This benefit, combined with the fast switching speed and ruggedized device .

IRF4905 datasheet mosfet

Absolute Maximum Ratings (Ta = 25°C)

1. Drain to source voltage: VDSS = – 55 V

2. Gate to source voltage: VGSS = ± 20 V

3. Drain current: ID = – 74 A

4. Total dissipation : Pd = 200 W

5. Channel temperature: Tch = 175 °C

6. Storage temperature: Tstg = -55 to +175 °C

 

 

IRF4905 PDF Datasheet

OB2279 PDF Datasheet – Current Mode PWM Controller

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This post explains for the PWM Controller. A current-mode PWM (Pulse Width Modulation) controller is an integrated circuit (IC) or semiconductor device designed to control the duty cycle of a switching power supply based on the feedback of the output current. It is commonly used in switch-mode power supplies (SMPS) to regulate and control the output voltage or current, making it a fundamental component in many electronic devices and power conversion applications.

The Part Number is OB2279.

The function of this semiconductor is Current Mode PWM Controller.

The package is DIP, SOP 8 Pin Type

Manufacturer: On-Bright

Preview images :OB2279 pdf controller

Description

The OB2279 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications.

PWM switching frequency at normal operation is externally programmable and trimmed to tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Lower standby power and higher conversion efficiency is thus achieved.

Pinouts

OB2279 pinout datasheet

Features

1. On-Bright Proprietary Frequency Shuffling Technology for Improved EMI Performance

2. Power On Soft Start

3. Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design

4. Audio Noise Free Operation

5. External Programmable PWM Switching Frequency

6. Internal Synchronized Slope Compensation

7. Low VIN/VDD Startup Current(3uA) and Low Operating Current (2.3mA)

 

Applications:

1. Adaptor

2. Notebook Adaptor

3. LCD Monitor/TV/PC/Set-Top Box Power Supplies

4. Open-frame SMPS

5. Printer Power

Other data sheets are available within the file: OB2279AP, OB2279CP, OB2279CPA,

0B2279AP, 0B2279CP, 0B2279CPA, 0B2279

 

OB2279 PDF Datasheet