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RS2051 - 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, Burst & CRM (Cycle Reset Mode).
  • Low Operating Current (1.2mA).
  • Low Start-up Current (about 3μA).
  • Under Voltage Lockout (UVLO).
  • Built-in Synchronized Slope Compensation.
  • Built-in Frequency Jiggling for better EMI Signature.
  • Programmable PWM Frequency.
  • Audio Noise Free Operation.
  • Soft Clamped GATE output voltage 18V.
  • VDD over voltage protect 34V.
  • Cycle-by-cycle current limiting.
  • Sense Fault Protect ion.
  • Latch mode Aft.

📥 Download Datasheet

Datasheet Details

Part number RS2051
Manufacturer PTC
File Size 541.85 KB
Description 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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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 Burst/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 (2MΩ). Built-in synchronized slope compensation enhances the stability of the system and avoids sub-harmonic oscillation. Dynamic peak current limiting circuit minimizes output power change caused by delay time of the system over a universal AC input range.