This post describes for the controller.

The Part Number is 1200AP100, NCP1200A.

The function of this semiconductor is PWM Current-Mode Controller.

The package is DIP 8 Pin Type

The manufacturer of this part is ON Semiconductor.

See the preview image and the PDF file for more information.

1 page

Description

The 1200AP100 is PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Low Standby Power.

Housed in SOIC−8 or PDIP−8 package, the NCP1200A enhances the previous NCP1200 series by offering a reduced optocoupler current together with an increased drive capability. Due to its novel concept, the circuit allows the implementation of complete off−line AC−DC adapters, battery charger or a SMPS where standby power is a key parameter.

With an internal structure operating at a fixed 40 kHz, 60 kHz or 100 kHz, the controller supplies itself from the high−voltage rail, avoiding the need of an auxiliary winding. This feature naturally eases the designer task in battery charger applications. Finally, current−mode control provides an excellent audio−susceptibility and inherent pulse−by−pulse control.

A PWM (Pulse-Width Modulation) Current-Mode Controller is a type of electronic control circuit used in power electronics and voltage regulation. This controller is commonly used in switch-mode power supplies, such as buck, boost, and buck-boost converters. It is designed to regulate the current flowing through an inductor or load by adjusting the width of the output pulses.

Features

• Pb−Free Packages are Available

• No Auxiliary Winding Operation

• Auto−Recovery Internal Output Short−Circuit Protection

• Extremely Low No−Load Standby Power

• Current−Mode Control with Skip−Cycle Capability

• Internal Temperature Shutdown

• Internal Leading Edge Blanking

• 250 mA Peak Current Capability

 

2 page

Other data sheets are available within the file: NCP1200AP100, NCP1200AP100G

1200AP100 PDF Datasheet

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This post explains for the Controller.

The Part Number is THX-203H.

The function of this semiconductor is Switching Power Controller.

Manufacturer: ETC

Preview images :

Description

THX-203H is Switching Power Controller IC. This is a semiconductor device designed to control and regulate the operation of a switching power supply (SMPS). SMPSs are widely used to efficiently convert one voltage level to another, making them crucial components in various electronic devices, including power adapters, voltage regulators, LED drivers, and more. Switching Power Controller ICs play a central role in governing the switching operation of power transistors, thereby regulating the output voltage or current.

PWM controller of high-performance current mode is specially designed for AC/DC transformer with high performance and price ratio, which supplies continuous output power of 12W within the range of wide-voltage between 85V and 265V, the output power of peak value can be up to 18W.

The combination of optimized reasonable circuit design and bipolar facture technology with high performance and price ratio economizes the whole cost ultimately. The power controller can be applied to the typical flyback circuit topology so as to form a simple AC/DC
transformer.

Features

1. Set-in high-voltage power switch tube of 700V and few peripheral components

2. With the modulation of lock pulse width, the testing is according to the pulse limit
current.

3. With the function of output frequency reduction, the non-output power consumption can
be less than 0.3W.

4. Inner-built ramp and anti-feedback compensation function

Block Diagram

Applications:

1. Adaptor (for example, travel charger, out power station)

2. Open Frame (for example, DVD, DVB)

THX-203H PDF Datasheet