Datasheet4U Logo Datasheet4U.com

SD4840 - PWM Controller

General Description

SD4840/4841/4842/4843/4844 is a current mode PWM controller with low standby power and low start current for power switch.

In standby mode, the circuit enters burst mode to reduce the standby power dissipation.

The switch frequency is 67KHz with ±2.5 KHz jitter frequency for low EMI.

Key Features

  • Lower start-up current (Typ.6μA).
  • Frequency jitter for low EMI.
  • Overcurrent protection.
  • Overvoltage protection.
  • Undervoltage lockout.
  • Built-in temperature protection.
  • Built-in high voltage MOSFET www. DataSheet4U. com.
  • Auto restart mode.

📥 Download Datasheet

Datasheet Details

Part number SD4840
Manufacturer Silan Microelectronics
File Size 787.06 KB
Description PWM Controller
Datasheet download datasheet SD4840 Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
SD484-52-05-301 Photodiode Arrays ETC
SD484XP67K65 CURRENT MODE PWM CONTROLLER SL
SD4863 Dual-Tone Bridge Audio Power Amplifier Chip Zhenda
SD48C BIDIRECTIONAL TVS DIODE Leiditech
SD48D40-06 DC Control Solid-State Relay Teledyne

Other Datasheets by Silan Microelectronics

Part Number Description
SD4840P PWM Controller
SD4841 PWM Controller
SD4841P PWM Controller
SD4842 PWM Controller
SD4842P PWM Controller

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
SD4840/4841/4842/4843/4844 CURRENT MODE PWM CONTROLLER WITH BUILT-IN HIGH VOLTAGE MOSFET DESCRIPTION SD4840/4841/4842/4843/4844 is a current mode PWM controller with low standby power and low start current for power switch. In standby mode, the circuit enters burst mode to reduce the standby power dissipation. The switch frequency is 67KHz with ±2.5 KHz jitter frequency for low EMI. The stress on transformer during power on is reduced by the builtin 15ms soft start circuit to avoid the saturation of transformer. SD4840/4841/4842/4843/4844 includes under voltage lock-out, over voltage protection, leading edge blanking, over current protection and the temperature protection. The circuit will restart automatically until the system is normal after the protection is active.