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Position:IcFull.com » IC Electronic information » Category: F

IC Electronic information

FAN302HL: Highly Integrated PWM Controller

In Electronic Infomation Category: F | on March 18,2011

FAN302HL is a highly integrated PWM controller, with a number of general upgrading of the flyback converter performance characteristics, such as integrated 500V JFET, the device is turned off in the current path to reduce the startup losses. Its patented constant current control topology that simplifies circuit design, and LT1477CS8 datasheet and without the secondary side constant-current feedback circuit for battery charger applications, provide an important advantage.

FAN302HL also has several features, including a by-cycle current limit to ensure that the fixed peak current limit level, even in the case of a short circuit is no different. In addition, the device will be clamped at 15V gate-level output voltage, to protect the power MOSFET to prevent the gate - source voltage is too high, causing damage.

FAN302HL no external secondary-side over-voltage protection (OVP) circuit, if the VS pin OVP function or over-temperature protection features within any one is triggered, the device will enter lockdown mode until the AC power off until OVP to be able to eliminate the secondary-side components, while enhancing the protection VO (

Pin configuration


functional block diagram

Features

under the ultra-low standby power consumption in 230VAC 10mW

constant current (CC) control, without secondary feedback circuits

fixed PWM frequency of 85kHz, hopping to solve EMI problems

high-voltage start-up

Low operating current: 3.5mA

peak current mode control in the constant voltage regulator

-by-cycle current limit

VDD over-voltage protection (auto restart)

Over Voltage Protection (Latch mode)

VDD undervoltage lockout (UVLO)

Gate output voltage clamped at 15V

fixed over-temperature protection (latch mode)

8-lead SOIC package

Typical application

Application

For cellular phones, cordless phones, PDA, digital cameras, power tools, batteries and LT1477CS8 price and chargers. Replace the linear transformers and LT1477CS8 suppliers and RCC SMPS.

data download: FAN302HL.rar

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