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MC44604

Motorola
Part Number MC44604
Manufacturer Motorola
Description HIGH SAFETY STANDBY LADDER MODE GREENLINE PWM CONTROLLER
Published May 11, 2005
Detailed Description Order this document from Analog Marketing MC44604 High Safety Standby Ladder Mode GreenLine™ PWM Controller The MC44604...
Datasheet PDF File MC44604 PDF File

MC44604
MC44604

Overview
Order this document from Analog Marketing MC44604 High Safety Standby Ladder Mode GreenLine™ PWM Controller The MC44604 is an enhanced high performance controller that is specifically designed for off–line and dc–to–dc converter applications.
The MC44604 is a modification of the MC44603.
The MC44604 offers enhanced safety and reliable power management in its protection features (foldback, overvoltage detection, soft–start, accurate demagnetization detection).
Its high current totem pole output is also ideally suited for driving a power MOSFET but can also be used for driving a bipolar transistor in low power converters (< 150 W).
In addition, the MC44604 offers a new efficient way to reduce the standby operating power by means of a patented standby ladder mode operation of the converter significantly reducing the converter consumption in standby mode.
Current or Voltage Mode Controller Product Preview HIGH SAFETY STANDBY LADDER MODE GREENLINE™ PWM CONTROLLER SEMICONDUCTOR TECHNICAL DATA 16 1 • • • • • • • • • • • • • • • • • • Operation Up to 250 kHz Output Switching Frequency Inherent Feed Forward Compensation Latching PWM for Cycle–by–Cycle Current Limiting Oscillator with Precise Frequency Control P SUFFIX PLASTIC PACKAGE CASE 648 High Flexibility Externally Programmable Reference Current Secondary or Primary Sensing High Current Totem Pole Output Undervoltage Lockout with Hysteresis PIN CONNECTIONS VCC VC Output Gnd Foldback Input Overvoltage Protection Current Sense Input Demagnetization Detection Input 1 2 3 4 5 6 7 8 (Top View) 16 Rref 15 Standby Management 14 Error Amp Input 13 Error Amp Output 12 Clamp Error Amp Input max 11 Votlage Mode C 10 T Soft–Start/D / Safety/Protection Features Overvoltage Protection Facility Against Open Loop Protection Against Short Circuit on Oscillator Pin Fully Programmable Foldback Soft–Start Feature Accurate Maximum Duty Cycle Setting Demagnetization (Zero Current Detection) Protection Internally Trimmed Reference ...


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