A Current-Mode PWM (Pulse-Width Modulation) controller is a type of integrated circuit (IC) or controller used in power electronics for regulating the output voltage or current in switch-mode power supplies (SMPS) and other related applications.

Part Number: LD7523, LD7523GS, LD7523GN

Function: Smart Green-Mode PWM Controller

Package: DIP, SOP 8 Pin Type

Manufacturer: Leadtrend

Images:

Description

The LD7523 is a low startup current, current mode PWM controller with green-mode power-saving operation. The SOP-8/DIP-8 package integrated functions such as the leading- edge blanking of the current sensing, internal slope compensation, line compensation, and several
protection features. The protection functions include cycle-by-cycle current limit, OVP, OLP, and brownout protection. It provides the users a high efficiency, low external component counts solution for AC/DC power applications.

Features

1. High-Voltage CMOS Process with Excellent ESD protection

2. Very Low Startup Current (< 35μA)

3. Current Mode Control

4. Non-audible-noise Green Mode Control

5. UVLO (Under Voltage Lockout)

6. LEB (Leading-Edge Blanking) on CS Pin

Pinouts:

Applications:

1. Switching AC/DC Adaptor and Battery Charger

2. Open Frame Switching Power Supply

3. LCD Monitor/TV Power

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LD7523 PDF Datasheet

Part Number: STR-W6053S

Function: Off-Line PWM Controller

Package: TO220F-6L Type

Manufacturer: Sanken

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Description

This is Off-Line PWM Controllers with Integrated Power MOSFET. The STR-W6000S, STR-W6053S series are power ICs for switching power supplies, incorporating a MOSFET and a current mode PWM controller IC. The low standby power is accomplished by the automatic switching between the PWM operation in normal operation and the burst-oscillation under light load conditions. The product achieves high cost-performance power supply systems with few external components.

An offline PWM (Pulse-Width Modulation) controller, also known as a flyback controller, is an integrated circuit (IC) or electronic device used in power supply and power conversion applications. Its primary function is to regulate the output voltage of a power supply by controlling the duty cycle of a switching transistor, typically in a flyback topology. Offline PWM controllers are commonly used in various power supply designs, including AC-DC converters, DC-DC converters, and isolated power supplies.

Features

1. Current Mode Type PWM Control

2. Brown-In and Brown-Out function

3. Auto Standby Function No Load Power Consumption < 30 mW

4. Operation Mode :

(1) Normal Operation : PWM Mode

(2) Standby : Burst Oscillation Mode

5. Random Switching Function

6. Slope Compensation Function

7. Leading Edge Blanking Function

8. Bias Assist Function

9. Audible Noise Suppression function during Standby mode

 

Applications:

1. White goods

2. Office automation equipment

3. Industrial equipment

STR-W6053S PDF Datasheet