This post explains for the MOSFET.

The Part Number is 4957AGM, AP4957AGM.

The function of this semiconductor is -30V, -7.4A, P-Channel Power MOSFET.

The package is SO-8 pin Type

Manufacturer: Advanced Power Electronics

Preview images :

Description

4957AGM is P-CHANNEL ENHANCEMENT MODE POWER MOSFET.

Advanced Power MOSFETs from APEC provide the designer with the best combination of fast switching, ruggedized device design, ultra low on-resistance and cost-effectiveness.

Features

1. Low On-Resistance

2. Simple Drive Requirement

3. Dual P MOSFET Package

Absolute Maximum Ratings (Ta = 25°C)

1. Drain to source voltage: VDSS = – 30 V

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

3. Drain current: ID = – 7.4 A

4. Total Power Dissipation: Pd = 2 W

5. Channel temperature: Tch = 150 °C

6. Storage temperature: Tstg = -55 to +150 °C

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4957AGM PDF Datasheet

Part Number: F9222L, F9221L

Function: 500V, MOSFET, M-POWER2

Package: SIP-13 Pin Type

Manufacturer: Fuji

Images:

Description

F9222L is Fuji Smart power device Fuji Smart power device. M-POWER2 for Multi for Multi-oscillated current resonant type power supply oscillated current resonant type power supply.

“MOSFET for Switch Power IC” refers to the type of metal-oxide-semiconductor field-effect transistor (MOSFET) that is commonly used in switch-mode power supply (SMPS) integrated circuits (ICs). These MOSFETs are designed to handle the high currents and switching frequencies involved in power conversion processes within SMPS designs.

Switch-mode power supplies are widely used to efficiently convert one voltage level to another, often with regulation and isolation. They are commonly found in various electronic devices, including computers, mobile phones, televisions, and more. The MOSFETs used in these applications play a crucial role in controlling the power flow and efficiency of the SMPS.

Features

Multiple-chip Power Device：M-POWER2 contains IC and two MOSFETs in SIP-13pin package.
M-POWER has various types of protection functions.

1. High efficiency (a reduction in SMPS size is possible.)

(1) DC/DC : 92.3%(DC input:400V,output:16V)

(2)PFC+DC/DC :87.0%(AC100V),89.5%(AC200V)

2. Fail-safety (Built in protection functions:OC,SC,OV,Tj(OH))

3. Easy design power supply (Reduction of design time

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F9222L PDF Datasheet