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CS3865CGDW16 Fiches technique(PDF) 1 Page - Cherry Semiconductor Corporation |
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CS3865CGDW16 Fiches technique(HTML) 1 Page - Cherry Semiconductor Corporation |
1 / 8 page 1 Features + - + - VREF SYNC Oscillator Error Amp 1 Error Amp 2 Latching PWM 2 Latching PWM 1 VREF Undervoltage Lockout 5.0V Ref VCC Undervoltage Lockout VCC VFB 1 COMP1 ENABLE2 VFB 2 COMP2 CT RT Gnd Pwr Gnd Sense2 VOUT 2 Sense1 VOUT 1 s Oscillator has Precise Duty Cycle Limit and Frequency Control s 500kHz Current Mode Operation s Automatic Feed Forward Compensation s Separate Latching PWMs for Cycle-By-Cycle Current Limiting s Internally Trimmed Reference with Undervoltage Lockout s Switchable Second Output s Two High Current Totem Pole Outputs s Input Undervoltage Lockout with Hysteresis s Low Start-Up and Operating Current Package Options 16L PDIP & SO Wide High Performance Dual Channel Current Mode Controller with ENABLE 1 SYNC 2 3 4 5 6 7 8 CT RT VFB 1 COMP1 Sense1 VOUT 1 Gnd 16 15 14 13 12 11 10 9 VCC VREF ENABLE2 VFB 2 COMP2 Sense2 VOUT 2 Pwr Gnd CS3865C Description The CS3865C is a high perfor- mance, fixed frequency, dual cur- rent mode controller. It is used in Off-Line and DC to DC converter applications and require a mini- mum number of external compo- nents. This integrated circuit fea- tures a unique oscillator for precise duty cycle limit and frequency con- trol, a temperature compensated reference, two high gain error amplifiers, two current sensing comparators, and two high current totem pole outputs ideally suited for driving power MOSFETs. One of the outputs VOUT 2 is switchable via the ENABLE 2 pin. Also included are protective fea- tures consisting of input and refer- ence undervoltage lockouts each with hysteresis, cycle-by-cycle cur- rent limiting, and a latch for single pulse metering of each output. The CS3865C has a 14V start volt- age and is pin compatible with the MC34065H. Block Diagram Rev. 12/16/96 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 ® |
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