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CS51023EDR16 Datasheet(PDF) 1 Page - Cherry Semiconductor Corporation |
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CS51023EDR16 Datasheet(HTML) 1 Page - Cherry Semiconductor Corporation |
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1 / 9 page  The CS51021/22/23/24 Fixed Frequency PWM Current Mode Controller family provides all neces- sary features required for AC-DC or DC-DC primary side control. Several features are included elimi- nating the additional components needed to implement them external- ly. In addition to low start-up cur- rent (75µA) and high frequency operation capability, the CS51021/ 22/23/24 family includes overvolt- age and undervoltage monitoring, externally programmable dual threshold overcurrent protection, current sense leading edge blank- ing, current slope compensation, accurate duty cycle control and an externally available 5V reference. The CS51021 and CS51023 feature bidirectional synchronization capa- bility, while the CS51022 and CS51024 offer a sleep mode with 100µA maximum IC current con- sumption. The CS51021/22/23/24 family is available in a 16 lead nar- row body SO package. 1 Features VIN (36V to 72V) 51k 0.01µF 470pF 6.98k, 1% 10 6.98k, 1% PGND 200K,1% 0.1µF 100p 62 IRF6345 100 1µF 10 680pF 10K 1K 180 MOC81025 2K,1% 100µF 100µF SGND VOUT (5V/5A) 22K 5.1K 0.1µF 1000pF SYNC/SLEEP 2.49K,1% 51K 10K 0.01µF 2K, 1% 1K 330pF MBRB2060CT 100pF 10 BA521 10K BAS21 18V 22µF 11V FZT688 10 4700pF 24.3K 1% 100 TL431 4:1 100:1 2:5 UV U1 OV VREF RTCT ISET LGnd CSS VFB COMP SYNC/ SLEEP PGnd SLOPE VC VCC GATE ISENSE s 75µA Max. Startup Current s Fixed Frequency Current Mode Control s 1MHz Switching Frequency s Undervoltage Protection Monitor s Overvoltage Protection Monitor with Programmable Hysteresis s Programmable Dual Threshold Overcurrent Protection with Delayed Restart s Programmable Soft Start s Accurate Maximum Duty Cycle Limit s Programmable Slope Compensation s Leading Edge Current Sense Blanking s 1A Sink/Source Gate Drive s Bidirectional Synchronization (CS51021/23) s 50ns PWM Propagation Delay s 100µA Max Sleep Current (CS51022/24) Package Options Enhanced Current Mode PWM Controller CS51021/CS51023 CS51022/CS51024 Description Typical Application Diagram 1 SS VREF OV SLEEP or SYNC VFB RTCT VCC SLOPE ISET PGnd ISENSE COMP LGnd UV VC GATE 16 Lead SO Narrow Device Sleep/Synch VCC Start/Stop CS51021 Synch 8.25V/7.7V CS51022 Sleep 8.25V/7.7V CS51023 Synch 13V/7.7V CS51024 Sleep 13V/7.7V A Company ® 36-72V to 5V, 5A DC-DC Convertor Rev. 2/22/99 Cherry Semiconductor Corporation 2000 South County Trail, East Greenwich, RI 02818 Tel: (401)885-3600 Fax: (401)885-5786 Email: info@cherry-semi.com Web Site: www.cherry-semi.com Consult factory for other package options. |
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