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RT8573 - High Voltage Boost/SEPIC Controller

Description

The RT8573 is a current mode PWM controller designed to drive an external MOSFET for high current LED applications.

With a low side current sense amplifier threshold of 190mV, the LED current is programmable with one external current sense resistor.

Features

  • z High Voltage Capability : VIN Up to 36V, VOUT is limited by External MOSFET Switch z Boost Operation z Current Mode PWM with Programmable Switching Frequency z Easy Dimming Control : Analog or Digital Converting to Analog with One External Capacitor z True PWM Dimming : External FET Driver is Build- In z Programmable Soft-Start to Avoid Inrush Current z Programmable Over Voltage Protection z VIN Undervoltage Lockout and Thermal Shutdown z 16-Lead SOP Package z RoHS Compliant and Halogen Free A.

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Datasheet Details

Part number RT8573
Manufacturer Richtek
File Size 346.47 KB
Description High Voltage Boost/SEPIC Controller
Datasheet download datasheet RT8573 Datasheet

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Full PDF Text Transcription

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Preliminary RT8573 High Voltage Boost/SEPIC Controller General Description The RT8573 is a current mode PWM controller designed to drive an external MOSFET for high current LED applications. With a low side current sense amplifier threshold of 190mV, the LED current is programmable with one external current sense resistor. With programmable operating frequency up to 800kHz, the external inductor and capacitors can be small while maintaining high frequency. Dimming can be done by either analog or digital. A built-in clamping comparator and filter allow easy low noise analog dimming conversion from digital signal with only one external capacitor. An unique True PWM dimming control is made easy with MOSFET under LED string.
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