|Datasheet||Download MC44604D datasheet
MC44604 High Safety Standby Ladder Mode GreenLineTM PWM Controller
The is an enhanced high performance controller that is specifically designed for offline and dctodc converter applications. The is a modification of the MC44603. The MC44604 offers enhanced safety and reliable power management in its protection features (foldback, overvoltage detection, softstart, 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 ControllerHIGH SAFETY STANDBY LADDER MODE GREENLINETM PWM CONTROLLER
Operation to 250 kHz Output Switching Frequency Inherent Feed Forward Compensation Latching PWM for CyclebyCycle Current Limiting Oscillator with Precise Frequency Control
High Flexibility Externally Programmable Reference Current Secondary or Primary Sensing High Current Totem Pole Output Undervoltage Lockout with Hysteresis
Safety/Protection Features Overvoltage Protection Facility Against Open Loop Protection Against Short Circuit on Oscillator Pin Fully Programmable Foldback SoftStart Feature Accurate Maximum Duty Cycle Setting Demagnetization (Zero Current Detection) Protection Internally Trimmed Reference
VCC VC Output Gnd Foldback Input Overvoltage Protection Current Sense Input Demagnetization Detection Input16 Rref 15 Standby Management 14 Error Amp Input 13 Error Amp Output 12 Clamp Error Amp Input
GreenLineTM Controller: Low Startup and Operating Current Patented Standby Ladder Mode for Low Standby Losses Low dV/dT for Low EMI
GreenLine is a trademark of Motorola, Inc. Device MC44604P Operating Temperature Range to +85°C Package Plastic DIP
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. DIM INCHES MIN MAX BSC 0.050 BSC MILLIMETERS MIN MAX BSC 1.27 BSC
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