Order this document from Analog Marketing 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. SEMICONDUCTOR TECHNICAL DATA 16 Current or Voltage Mode Controller • • • • 1 Operation Up to 250 kHz Output Switching Frequency P SUFFIX PLASTIC PACKAGE CASE 648 Inherent Feed Forward Compensation Latching PWM for Cycle–by–Cycle Current Limiting Oscillator with Precise Frequency Control High Flexibility • • • • Externally Programmable Reference Current Secondary or Primary Sensing PIN CONNECTIONS High Current Totem Pole Output Undervoltage Lockout with Hysteresis Safety/Protection Features • • • • • • • Overvoltage Protection Facility Against Open Loop Soft–Start Feature Accurate Maximum Duty Cycle Setting Demagnetization (Zero Current Detection) Protection Internally Trimmed Reference 1 16 Rref VC 2 15 Standby Management Output 3 14 Error Amp Input Protection Against Short Circuit on Oscillator Pin Fully Programmable Foldback VCC Gnd 4 13 Error Amp Output Foldback Input 5 12 Clamp Error Amp Input Overvoltage Protection Current Sense Input 6 7 11 Votlage Modemax 10 CT Demagnetization Detection Input 8 9 Standby Soft–Start/D / Current Set (Top View) GreenLine Controller: • • • Low Startup and Operating Current Patented Standby Ladder Mode for Low Standby Losses ORDERING INFORMATION Low dV/dT for Low EMI GreenLine is a trademark of Motorola, Inc. This document contains information on a product under development. Motorola reserves the right to change or discontinue thisIC product without notice. MOTOROLA ANALOG DEVICE DATA Device Operating Temperature Range Package MC44604P TA = –25° to +85°C Plastic DIP Motorola, Inc. 1996 Issue 0 1 MC44604 OUTLINE DIMENSIONS P SUFFIX PLASTIC PACKAGE CASE 648–08 ISSUE R NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 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. –A– 16 9 1 8 B F C L S –T– SEATING PLANE K H G D J 16 PL 0.25 (0.010) M T A M M DIM A B C D F G H J K L M S INCHES MIN MAX 0.740 0.770 0.250 0.270 0.145 0.175 0.015 0.021 0.040 0.70 0.100 BSC 0.050 BSC 0.008 0.015 0.110 0.130 0.295 0.305 0_ 10 _ 0.020 0.040 MILLIMETERS MIN MAX 18.80 19.55 6.35 6.85 3.69 4.44 0.39 0.53 1.02 1.77 2.54 BSC 1.27 BSC 0.21 0.38 2.80 3.30 7.50 7.74 0_ 10 _ 0.51 1.01 Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. 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