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ST 3845B High Performance Current Mode PWM Controller

$22.00 $17.60

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STMicroelectronics 3845B is a high Performance current mode PWM controller. The 3845B control IC family provides the features required to implement off-line or DC to DC fixed frequency current mode control schemes with a low external part count. Internally implemented circuits include a trimmed oscillator with start-up current less than 0.5mA for precise DUTY CYCLE CONTROL under voltage lock-out, a precision reference trimmed for accuracy at the error amp input, logic to ensure latched operation, a PWM comparator with current limit control, and a totem pole output stage designed to source or sink high peak current. In the off-state, the output stage is low, making it suitable for driving N-Channel MOSFETs.

Features

  • Trimmed oscillator for precise frequency control
  • Oscillator frequency guaranteed at 250KHz
  • Automatic feed forward compensation
  • Latching PWD for cycle-by-cycle current limiting
  • High current totem pole output
  • Low start-up and operating current

Datasheet

Specifications
Model 3845B
Brand STMicroelectronics
Mounting Type SMD
Package SO8
No. of Pin 8
Supply Voltage 30V
Output Current 1A
Operating Temperature -40~150C
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