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RS2051 - Novel Low Cost Green-Mode PWM Controller

General Description

The RS2051 is a highly integrated low cost current mode PWM controller, which is ideal for small power current mode of offline AC-DC fly-back converter applications.

Key Features

  • Low Cost, PWM&PFM&CRM (Cycle Reset Mode) Low Start-up Current (about 1.5μA) Low Operating Current (about 2.2mA) Current Mode Operation Under Voltage Lockout (UVLO) Built-in Synchronized Slope Compensation Built-in fixed soft start with 1.2mS Built-in Frequency jitter for better EMI Signature Programmable PWM Frequency Audio Noise Free Operation Leading edge Blanking on Sense input Constant output power limiting for universal AC input Range.

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Datasheet Details

Part number RS2051
Manufacturer Orister
File Size 526.18 KB
Description Novel Low Cost Green-Mode PWM Controller
Datasheet download datasheet RS2051 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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RS2051 Novel Low Cost Green-Mode PWM Controller with Soft Start & Latch Mode Page No. : 1/13 Description The RS2051 is a highly integrated low cost current mode PWM controller, which is ideal for small power current mode of offline AC-DC fly-back converter applications. Making use of external resistors, the IC changes the operating frequency and automatically enters the PFM/CRM (Cycle Reset Mode) under light-load/zero-load conditions. This can minimize standby power consumption and achieve power-saving functions. With a very low start-up current, the RS2051 could use a large value start-up resistor (2Mohms). Built-in synchronized slope compensation enhances the stability of the system and avoids sub-harmonic oscillation.