A PWM (Pulse Width Modulation) current-mode controller is a type of electronic control system used in power electronics and switch-mode power supplies. It combines current sensing and feedback techniques with pulse width modulation to regulate and control the output current of a power converter.

Part Number: DAP011

Function: PWM Current-Mode Controller

Package: SO-14 Pin type

Manufacturer: ON Semiconductor

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Description

Housed in an SO−14 package, the DAP011/DAP011C represents an enhanced version of the Maximus, DAP008, controller. Due to its high drive capability, SpeedKing drives large gate−charge MOSFETs which, together with internal ramp compensation and a user selectable frequency jittering, ease the design of modern AC/DC adapters. With an internal structure operating at a fixed 65/100 kHz frequency, the controller directly connects to the high−voltage rail for a loss less and clean startup sequence. Current−mode control also provides an excellent input audio−susceptibility and inherent pulse−by−pulse control. Internal ramp compensation easily prevents subharmonic oscillations from taking place in continuous conduction mode designs. When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so−called skip cycle mode and provides excellent efficiency at light loads.

Features

• Current−Mode Control with Adjustable Skip−Cycle Capability

• Internal Ramp Compensation

• Adjustable Frequency Jittering for Better EMI Signature

• Auto−Recovery Internal Output Short−Circuit Protection

• Adjustable Timer for Improved Short−Circuit Protection

• Dedicated Latch Input

 

Typical Applications:

• High Power AC/DC Converters for TVs, Set−Top Boxes, etc.

• Offline Adapters for Notebooks

• All Power Supplies

[…]

Overall, a PWM current-mode controller is a versatile control technique widely used in various power electronic applications, including voltage regulators, DC-DC converters, motor drives, and LED drivers, among others. It offers advantages such as excellent transient response, inherent current limiting, and the ability to operate in continuous or discontinuous conduction modes.

DAP011 PDF Datasheet

Part Number: RM6203

Function: High Performance Current Mode PWM Switching Power Supply Controller

Package: DIP 8 Pin Type

Manufacturer: Reactor

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Description

The RM6203 is a current mode PWM switching power supply controller that specifically designed for AC/DC converter with high performance versus cost ratio. It provides continuous output power up to 12W in the broad voltage range of 85V – 265V.Its optimized and highly reasonable circuit design has made it possible to minimize the total cost of the
product.

This power supply controller could be used in typical flyback circuit topology to constitute simple AC/DC converter. The internal initiating circuit of RM6203 has been designed
with a unique means of current sink to complete the startup using the amplifying function of the power switching tube. This will significantly reduce the power consumption of the start-up resistor; and when the output power becomes smaller, RM6203 will automatically lower its operating frequency to enable very low standby power consumption. […]

Features:

■ Built-in 700V high voltage power switching tube with minimal external parts count

■ Latched PWM and pulse-by-pulse current limiting inspection

■ Reduced frequency at low output with standby power consumption below 0.25W

■ Built-in slope and feedback compensation function

■ Separate upper limit current inspection controller to handle timely the over-current and overload of the controller

■ Turn off periodic bias output of the emitter to improve the voltage resistance of the power tube

Applications:

■ Power Adaptors(traveling chargers ,stand-alone power set)

■ Internal power supply for Energy-Saving Appliances (such as electromagnetic oven, microwave oven and etc.)

RM6203 PDF Datasheet