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| Order this publication as PBMC44608/D Semiconductor Components Group Analog, Logic and Discretes 29-June-1999 neTM enLi re de G Mo lsed ntroller Pu Co ced van MPS S Ad Introduction The MC44608 is a high performance, very high voltage SWITCHMODETM Power Supply (SMPS) controller designed for off-line switching regulator circuits. Offered in a DIP-8 package, this highly integrated device features a start-up current source eliminating the need for the start-up resistor which results in a lower current draw and an increase in the overall system efficiency for fast lossless start up. Also integrated into the MC44608 is an on-chip oscillator with switching frequencies of 40, 75 or 100KHz for fast lossless off-line start-ups. This high level of integration reduces the number of external components required and saves on board space. The MC44608 is the latest addition to the GreenLineTM family of SMPS controllers that reduce power consumption of the end product in standby mode. By using the MC44608, this standby power consumption is lowered to approximately 1W in a 150W SMPS. This significant reduction happens as a result of the SMPS secondary reconfiguration which allows the unused output voltages to decrease while keeping the wake up block power supply nominal. m This SMPS controller also features multiple on-chip safety protection features such as demagnetization, current limitation, max duty cycle, thermal protection and open loop over-voltage protection. Features / Benefits Integrated Start-Up Current Source for Fast Lossless Off-Line StartUp Low Start-Up Current Programmable Pulsed Mode During Stand-By Operation On-Chip Oscillator Switching Frequency of 40, 75 or 100KHz Voltage Mode of Operation Secondary Feedback loop with few external components Multiple Protection Features (Demagnetization, Current Limitation, Thermal Protection, Max Duty Cycle, Over Vcc Protection against Open Loop and Open Loop Overvoltage Protection) GreenLine SMPS Controller Low dV/dT MOSFET Controlfor EMI Reduction Types of Applications TVs VCRs Monitors Printers, Fax machines, Copy Machines Off-Line Power Supplies up to 300W Typical Application MC44608 + MTP6N60E 80W Output SMPS System Standby: 1.3W Input with 300mW Output (See Schematic on Next Page) page 2 RFI FILTER High Voltage 47k 120pF 1N4934 MCR22-6 (TO92) 1N4148 1k BC237B 4.7k Output Level Adjustment 1 8 MC44608 33F 7 6 5 2 3 4 VCC Rsense 4.7k 22 270 4.7k TL431 BC237B T1 BC237B 4.7k VP P page 3 Customer Benefits Low End Product Stand-By Power Consumption can reach less than 1.3W in monitor during the OFF mode using secondary reconfiguration System Cost Savings fewer external components required Inventory Cost Savings Smaller PCB and More Compact End Products EMI Standard Easily Achievable Competitive Analysis MC44608 Package Burst Duty Cycle SMPS Regulation Start Up Current On/Off Pin DIP-8 Adjustable Secondary 300 A No Competitor A DIP-14 N/A Primary/Secondary 230 A Yes page 4 Literature Data sheets containing full specifications and pin descriptions are available under the respective part numbers, follwed by a "/D". See the last page for detailed information on how to obtain technical literature. Lead Time Samples and production quantities are currently available. Pricing for the MC44608 SMPS Controller is suggested at $0.75 for quantities of 10K. page 5 How to Obtain Technical Literature There are several ways to obtain Motorola Technical Literature and Publications. If you need any assistance, or if you are having difficulty, please email us at: SCGMKTG1@email.sps.mot.com or call us at (602) 2443882. You can order hardcopies of this product bulletin from LDC - refer to document number PBMC44608/D. Motorola Semiconductor Literature Search Website http://sps.motorola.com/cgi-bin/dlsrch Motorola Literature Distribution Center, Americas CD-ON-DEMAND, Literature Ordering From US & Canada Only (Toll free) From All Other Global Locations Northern Europe Central & Southern Europe Asia/Pacific (US Based Support for A/P) Japan (Toll free within Japan) Motorola MfaxTM Fax-Back System From US & Canada Only (Toll free) From All Other Global Locations Motorola SPS Home Page SPS Sales and Support SCG Home Page 1-800-774-1848, email: RMFAX0@email.sps.mot.com 1-602-244-6609 http://sps.motorola.com/cgi-bin/my-mot/moto.cgi/ http://sps.motorola.com/sps/General/sales.html/ http://sps.motorola.com/scg/ http://ldcformotorola.com/mtrl (Motorolans, Distributors & Partners) 1-800-441-2447, email: ldcformotorola@hibbertco.com 1-303-675-2140 44-1354-688040, email: ldcformotorola@response-service.co.uk 49-89-92103-559, email: ldcformotorola@ihw.com 852-2662-9298, email: ldcformotorola-asia@hibbertco.com 1-303-675-2130 (Tue-Fri 9:00am to 1:00pm, Hong Kong Time) 0120-191014, email: w3spd-tech@www.mot.co.jp GreenLine, SWITCHMODE and Mfax are trademarks of Motorola, Inc. All brand names and product names appearing in this publication are registered trademarks or trademarks of their respective holders. PBMC44608/D |
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