Datasheet4U Logo Datasheet4U.com

US1651 - PRIMARY-SIDE REGULATION PWM POWER SWITCH

General Description

The UTC US1651 is a primary control switch mode charger and adapter applications.

The controlled variable is transferred by an auxiliary winding from the secondary to the primary side.

Key Features

  • r>.
  • Programmable CV and CC regulation.
  • Primary-side sensing and regulation with No TL431 and opto-coupler.
  • Multi-mode operation for high efficiency.
  • Adjustable constant current and output power setting.
  • Power on soft-start time (4ms).
  • Frequency shuffling and adjustable gate drive greatly improving EMI.
  • ”Extended burst mode control” for improved efficiency and minimum standby design.
  • Built-in leading edge blanking (LEB).
  • VDD under voltage lockout.
  • VDD.

📥 Download Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
US16FL SURFACE MOUNT ULTRA FAST RECTIFIER KD
US16MY02AA DISPLAY MODULE FUTABA
US16SY11AB DISPLAY MODULE FUTABA
US1 SMA ultra fast low-loss controlled avalanche rectifiers NXP
US1000FL 1.0A SURFACE MOUNT GLASS PASSIVATED ULTRAFAST DIODE WON-TOP

Other Datasheets by Unisonic Technologies

Part Number Description
US1652 PRIMARY-SIDE REGULATION PWM POWER SWITCH
US16855 DUAL HIGH-SIDE SWITCH
US12231 POWER INTERFACE SWITCH
US1528 CMOS IC
US1702 HIGH PERFORMANCE CURRENT MODE POWER SWITCH

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.

View original datasheet text
UNISONIC TECHNOLOGIES CO., LTD US1651 Preliminary PRIMARY-SIDE REGULATION PWM POWER SWITCH CMOS IC  DESCRIPTION The UTC US1651 is a primary control switch mode charger and adapter applications. The controlled variable is transferred by an auxiliary winding from the secondary to the primary side. The device integrates PWM controller to enhance the performance of discontinuous conduction mode (DCM) flyback converters. The UTC US1651 operates in primary-side sensing and regulation. Opto-coupler and TL431 could be eliminated. It operates in fixed frequency mode at large load conditions, frequency reduction mode at light/medium load and ‘Extended burst mode’ at No/light load conditions. So that low standby power can be achieved.