L6564D

Series:	--
Packaging:	Tube
Part Status:	Active
Mode:	Discontinuous (Transition)
Frequency - Switching:	--
Current - Startup:	90µA
Voltage - Supply:	10.3 V ~ 22.5 V
Operating Temperature:	-25°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	10-SOP (0.154", 3.90mm Width)
Supplier Device Package:	10-SSOP
Base Part Number:	L6564

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Overview

The L6564D is a Power Factor Correction (PFC) integrated circuit from STMicroelectronics. It is implemented in a state-of-the-art synchronous-rectification technology, and provides high efficiency and accurate control in a wide input voltage and range of output power levels. The L6564D has broad application in the energy-saving and energy-management areas where high-efficiency, high stability, and low noise operation is required in all kinds of power supplies.

Application Fields

The L6564D can be used in a variety of applications. As a Power Factor Correction (PFC) controller, it can be used in an offline PFC boost converter to meet efficiency requirements as well as a variety of other switching power supply topologies. It can be used in battery chargers and other portable devices, automotive interior and exterior lighting systems, LED driver applications, power adapters, and power systems requiring output power up to 250 W.

Working Principle

The working principle of the L6564D is based on the hysteretic control technique. In hysteretic control, the output voltage is set as a function of an input voltage, and the comparator is used to detect the peak of the input voltage. When the input voltage exceeds the set value, the switch will turn off.The L6564D contains two cascaded comparators with hysteretic thresholds. The first comparator compares the signal from the current-sense resistor, with a hysteretic voltage threshold, and its output then turns off the main switch. The second comparator compares the voltage on the output capacitor with a hysteretic voltage, and its output then turns on the synchronous rectifier. The L6564D then controls the power output of the converter and hence maximizes the power efficiency.

Features

The L6564D has many features, including:• Internal fault detection circuitry to detect overcurrent, overtemperature and overvoltage conditions• On-chip high-efficiency synchronous rectifier driver• Internal \'SoftStart\' and \'AutoRestart\' circuit• External adjustable blanking time• Programmable peak current limit• Undervoltage lockout (UVLO)• Adjustable switching frequency

Conclusion

The L6564D is an integrated Power Factor Correction (PFC) controller from STMicroelectronics, and is widely used in a variety of energy-saving and energy-management applications. It features a state-of-the-art synchronous-rectification technology and many features that make it ideal for a variety of applications. It provides high efficiency and accurate control in a wide input voltage and range of output power levels.

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