M5840 Datasheet PDF – Off-line PWM Controller, SOP 8

Part Number: M5840

Function: High-performance Off-line PWM Controller

Package: SOP-8 Pin Type

Manufacturer: Mojay ( www.mojay.com.cn )


M5840 datasheet pdf


This is high-performance off-line PWM controller for low-power AC/DC chargers and power adapter.

The M5840 is a high-performance off-line PWM power switch used in low-power AC/DC battery chargers, power adapters, and LEDs. The constant voltage and constant current accuracy can be maintained within ±5% within the full voltage input range. The chip adopts the primary side feedback technology, so that the TL431 and optocoupler can be saved in the system application to reduce the cost.



M5840 pinout


1. Constant voltage and constant current accuracy up to 5%

2. Primary side control mode, no need for TL431 and optocoupler

3. Flyback Topology in Discontinuous Mode

4. Quasi-resonant switching mode reduces switching losses

5. Built-in leading edge blanking circuit (LEB)

6. Constant voltage and constant current control



Suitable for small and medium power AC/DC off-line switching power supply

1. CC/CV battery charger

2. Mobile/cordless phone chargers

3. digital camera charger

4. PDA charger

5. Low power power adapter



M5840 Datasheet PDF

M5840 pdf

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STK412-220 Datasheet PDF – 2-Channel AF Power Amplifier

Part Number: STK412-220, STK412-220A

Function: 2-channel AF Power Amplifier

Package: SIP 18 Pin type

Manufacturer: Sony

STK412-220 datasheet pinout


This is 80W x 2 channel, Class H, AF Power amplifer, THD = 0.8%.

The STK412-220 is a power amplifier integrated circuit (IC) produced by Sanyo Semiconductor Corporation. It is a hybrid IC that combines an analog power amplifier with a digital control circuit in one package. TheSTK412220 is designed for use in audio power amplification applications, such as audio systems in vehicles and home theater systems. It features high output power, low distortion, and good heat dissipation.

The STK412-000 series are class H audio power amplifier ybrid ICs that feature a built-in shift power supply circuit. These ICs provide high efficiency audio power amplification by controlling (switching) the supply voltage supplied to the power transistors according to the detected level of the input audio signal.


stk412-220a power amplifier


1. Channels : 2

2. Class : Power supply switching ( Class H )

3. Lead pitch (mm) = 2.54 mm

4. Po (W) = 80 W

5. THD(%) = 0.8 %

6. Vcc max (V) = +-65, Vcch max(Vccl) = ±42



STK413-220 Pinout:




stk412-220a datasheet pinout



1. Audio Equipment

STK412-220 Datasheet

1. http://bbs.hifidiy.net/thread-440208-1-1.html

2. https://www.elitesecurity.org/t461587-Kenwood-KRF-VD-pojacalo-reciver-nema-zvuka

STK412-150 Datasheet PDF

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