CQO765RT Datasheet, CQ0765RT PDF – Power Switch

Posted on June 16, 2022October 22, 2022 by pinout

Part Number: CQO765RT

CQO765RT => Correct Part number CQ0765RT

Package: TO-220 Type

Function: Green Mode Fairchild Power Switch

Manufacturer: Fairchild

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Features

1. Optimized for Quasi-Resonant Converter (QRC)
2. Advanced Burst-Mode Operation for under 1 W Standby Power Consumption
3. Pulse-by-Pulse Current Limit
4. Under-Voltage Lockout (UVLO) with Hysteresis
5. Extended Quasi-Resonant Switching

Pinouts:

Description

A Quasi-Resonant Converter (QRC) typically shows lower EMI and higher power conversion efficiency compared to a conventional hard-switched converter with a fixed switching frequency.

In general, Quasi-Resonant Converter (QRC) shows lower EMI and higher power conversion efficiency compared to the conventional hard switched converter with a fixed switching frequency. Therefore, it is well suited for applications that are sensitive to the noise, such as color TV and audio. The FSCQ0765RT is an integrated Pulse Width Modulation (PWM) controller and Sense FET specifically designed for Quasi-resonant off-line Switch Mode Power Supplies (SMPS) with minimal external components. The PWM controller includes integrated fixed frequency oscillator, under voltage lockout, leading edge blanking (LEB), optimized gate driver, internal soft start, temperature compensated precise current sources for a loop compensation and self protection circuitry. Compared with discrete MOSFET and PWM controller solution, it can reduce total cost, component count, size and weight simultaneously increasing efficiency, productivity, and system reliability. This device is a basic platform well suited for cost effective designs of Quasi resonant switching flyback converters.

Block Diagram

Applications

1. CTV
2. Audio Amplifier

Other data sheets are available within the file: CQ0565RT, CQ05659T, CQ1265RT, CQ1565RT,

CQO565RT, CQO5659T.

CQO765RT Datasheet

FAN6862 Datasheet PDF – Green-Mode PWM Controller

Posted on June 15, 2022December 7, 2022 by pinout

Part Number: FAN6862, FAN6862TY, FAN6862NY

Function: Green-Mode PWM Controller

Package: SSOT-6, DIP 8 Pin Type

Manufacturer: Fairchildsemi

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Description

This FAN6862 is Highly Integrated Green-Mode PWM Controller.

A highly integrated PWM controller, FAN6862 provides several features to enhance the performance of flyback converters. To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to continuously decrease the switching frequency under light-load conditions. Under zero-load conditions, the power supply enters burst-mode, which completely shuts off PWM output. Output restarts just before the supply voltage drops below the UVLO lower limit. This green-mode function enables power supplies to meet international power conservation requirements.

The FAN6862 is designed for SMPS and integrates a frequency-hopping function that helps reduce EMI emission of a power supply with minimum line filters. The built-in synchronized slope compensation is proprietary sawtooth compensation for constant output power limit over universal AC input range. The gate output is clamped at 18V to protect the external MOSFET from over-voltage damage.

Other protection functions include V_DD over-voltage protection and over-temperature protection. For over-temperature protection, an external NTC thermistor can be applied to sense the ambient temperature. When V_DD OVP or OTP is activated, an internal latch circuit latches off the controller.

Block Diagram :

Features

1. Low Startup Current: 8μA

2. Low Operating Current in Green Mode: 3mA

3. Peak-Current Mode Operation with Cycle-by-Cycle Current Limiting

4. PWM Frequency Continuously Decreasing with Burst Mode at Light Loads

5. VDD Over-Voltage Protection (OVP)

6. Constant Output Power Limit (Full AC Input Range)

7. Internal Latch Circuit for OVP, OTP