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ML4811

Features: Integrating Soft Start Reset High current (2A peak) dual totem pole outputs Practical operation to 1MHz (fOSC) 5.1V ±2% trimmed bandgap reference Under voltage lockout with 7V hysteresis Soft Start Reset Delay (ML4811) Oscillator synchronization function (ML4811) Soft Start latch ensure...

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SeekIC No. : 004422090 Detail

ML4811: Features: Integrating Soft Start Reset High current (2A peak) dual totem pole outputs Practical operation to 1MHz (fOSC) 5.1V ±2% trimmed bandgap reference Under voltage lockout with 7V hysteresis ...

ML4811 Data Sheet

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Part Number:
ML4811
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

Integrating Soft Start Reset
High current (2A peak) dual totem pole outputs
Practical operation to 1MHz (fOSC)
5.1V ±2% trimmed bandgap reference
Under voltage lockout with 7V hysteresis
Soft Start Reset Delay (ML4811)
Oscillator synchronization function (ML4811)
Soft Start latch ensures full soft start cycle
Outputs pull low for undervoltage lockout
Accurately controlled oscillator ramp discharge current
All timing currents "slaved" to RT for precise control


Pinout

Connection Diagram




Specifications

Supply Voltage (Pins 18, 16) ...................................... 25V
Output Current, Source or Sink (Pins 14, 17)
DC ............................................................................. 0.5A
Pulse (0.5ms) ............................................................. 2.0A
Analog Inputs
(Pins INV, NI, SOFT START) ............................. 0.3V to 7V
(Pins 9, 10, 11, 12, 20) ................................... 0.3V to 6V
Clock Output Current (Pins 5) ....................................5mA
Error Amplifier Output Current (Pin 3) ......................... 5mA
Junction Temperature .............................................. 150°C
Storage Temperature Range .................... 65°C to 150°C
Lead Temperature (Soldering 10 sec.) .................... 260°C
Thermal Resistance (JA)
Plastic DIP ............................................................. 65°C/W
Plastic SOIC .......................................................... 65°C/W


Description

The ML4810 and ML4811 High Frequency PWM Controllers are optimized for use in Switch Mode Power Supply designs running at frequencies to 1MHz. The ML4810/11 contain a unique overload protection circuit which helps to limit stress on the output devices and reliably performs a soft-start reset. These controllers ML4811 are designed to work in either voltage or current mode and provide for input voltage feed forward.

A 1.1V threshold current limit comparator of ML4811 provides a cycle-by-cycle current limit. An integrating circuit "counts" the number of times the 1.1V limit was reached. A soft-start cycle is initiated if the cycle-by-cycle current limit is repeatedly activated. A reset delay function is provided on the ML4811.

These controllers ML4811 are similar to the UC1825 controller, however these controllers include many features not found on the 1825. These features are set in Italics.




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