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CS51221EN16 Scheda tecnica(PDF) 1 Page - Cherry Semiconductor Corporation |
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CS51221EN16 Scheda tecnica(HTML) 1 Page - Cherry Semiconductor Corporation |
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1 / 12 page  Features s 1MHz Frequency Capability s Fixed Frequency Voltage Mode Operation, with Feed Forward s Thermal Shutdown s Under Voltage Lock-out s Accurate Programmable Max Duty Cycle Limit s 1A Sink/Source Gate Drive s Programmable Pulse by Pulse Over Current Protection s Leading Edge Current Sense Blanking s 75ns Shutdown Propagation Delay s Programmable Soft Start s Under Voltage Protection s Over Voltage Protection with Programmable Hysteresis s Bidirectional Synchronization s 25ns GATE Rise and Fall Time (1nF load) s 3.3V 3% Reference Voltage Output Package Options Enhanced Voltage Mode PWM Controller CS51221 Description Application Diagram 1 GATE ISENSE SYNC FF UV OV RTCT ISET VC PGnd VCC LGnd SS COMP VFB VREF 16 Lead SO Narrow & PDIP 1 36V-72V to 5V/5A converter Rev. 3/26/99 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 A Company ® The CS51221 fixed frequency feed forward voltage mode PWM controller contains all of the features necessary for basic voltage mode operation. This PWM controller has been opti- mized for high frequency prima- ry side control operation. In addition, this device includes such features as: Soft Start, accu- rate duty cycle limit control, less than 50µA startup current, over and under voltage protection, and bidirectional synchroniza- tion. The CS51221 is available in 16 lead PDIP and SO narrow surface mount packages. VIN (36V to 72V) 51k 0.01µF 470pF 20.25k 10 13k 510k 0.1µF 62 IRF634 100 1µF 10 680pF 150 1k 180 MOC81025 2k 100µF SGnd VOUT (5V/5A) 2200pF 5.1k 0.1µF SYNC 4.3k 200 10k 1µF 2k 1k 330pF MBRB2545CT 100pF 10 D11 BAS21 10k BAS21 18V 22µF 11V FZT688 10 0.22µF 24.3k TL431 T1 4:1 T3 100:1 T2 2:5 UV U1 OV VREF RT/CT ISET LGnd SS VFB COMP SYNC PGnd FF VC VCC ISENSE GATE 160k 5.6k D13 V33MLA1206A23 4700pF |
Codice articolo simile - CS51221EN16 |
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Descrizione simile - CS51221EN16 |
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