Pinout

LD7577JA PDF – High Voltage Green-Mode PWM Controller

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A Green-Mode PWM Controller is a type of integrated circuit (IC) used in power supply applications, primarily in switched-mode power supplies (SMPS) and voltage regulator circuits. The term “Green-Mode” indicates that these controllers are designed to optimize power efficiency, reduce standby power consumption, and meet various energy efficiency standards and regulations, making electronic devices more environmentally friendly.

Part Number: LD7577JA

Function: High Voltage Green-Mode PWM Controller

Package: SOP-7, SOP-8 or DIP-8 Type

Manufacturer: Leadtrend

Images:LD7577JA pdf controller

Description

The LD7577JA integrated several functions of protections, and EMI-improved solution in a SOP-7, SOP-8/or DIP-8 package. It minimizes the component counts and the circuit space, and it’s perfect for the low cost of applications.

It provides functions of low startup current, green-mode power-saving operation, leading-edge blanking of the current sensing and internal slope compensation. Also, the device features more protections like OLP (Over Load Protection), OVP (Over Voltage Protection), and brownout protection to prevent the circuit being damaged from the abnormal conditions.

 

Features

1. High-Voltage (500V) Startup Circuit

2. Current Mode Control

3. Non-Audible-Noise Green Mode Control

4. UVLO (Under Voltage Lockout)

5. LEB (Leading-Edge Blanking) on CS Pin   [ … ]

Pinouts:
LD7577JA pinout datasheet

Applications:

1. Switching AC/DC Adaptor and Battery Charger

2. Open Frame Switching Power Supply

3. LCD Monitor/TV Power

LD7577JA PDF Datasheet

LA78040B PDF – Vertical Deflection Output IC

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Part Number: LA78040B

Function: Vertical Deflection Output IC

Package: TO220-7H Type

Manufacturer: Sanyo

Images:LA78040B pdf sanyo

Description

The LA78040B is a vertical deflection output IC for TVs and CRT displays with excellent image quality that use a BUS control system signal processing IC. This IC can drive the direct (even including a DC component) deflection yoke with the saw tooth wave output from the BUS control system signal processing IC.

A Vertical Deflection Output Integrated Circuit (IC) is a semiconductor device used in cathode-ray tube (CRT) television and monitor displays. Its primary function is to generate the vertical deflection signal necessary to control the vertical movement of the electron beam in the CRT. This vertical deflection signal is responsible for scanning and displaying the image on the screen from top to bottom.

Key features:

1. Vertical Deflection: The IC generates a sawtooth waveform, often referred to as the vertical deflection signal. This signal is applied to the vertical deflection coil in the CRT, which causes the electron beam to move vertically on the screen.

2. Frequency Control: The IC allows control over the frequency of the sawtooth waveform, which determines the refresh rate of the display. Common refresh rates for CRT displays include 60Hz, 75Hz, and 100Hz, among others.

 

Functions :

1. Low power dissipation due to built-in pump-up circuit

2. Vertical output circuit

3. Thermal protection circuit built in

4. Excellent crossover characteristics

5. DC coupling possible

Pinouts:

LA78040B pinout datasheet

LA78040B PDF Datasheet