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CS5651 Scheda tecnica(PDF) 7 Page - Cherry Semiconductor Corporation |
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CS5651 Scheda tecnica(HTML) 7 Page - Cherry Semiconductor Corporation |
7 / 8 page 7 ter capacitor. Ceramic bypass capacitors (0.1µF) connected directly to VCC and VREF may be required to improve noise filtering. This provides a low impedance path for filtering the high frequency noise. All high current loops should be kept as short as possible using heavy copper runs. The error amp compensation circuitry and the converter out- put voltage-divider should be located close to the IC and as far as possible from the power switch and other noise generating components. Operating Description: continued SYNC Capacitor CT Latch 1 “Set” Input COMP1 Sense1 VOUT1 Latch 1 “Reset” Input ENABLE2 Latch 2 “Set” Input COMP2 Sense2 Latch 2 “Reset” Input VOUT2 0V Timing Diagram + - + - + - + + + + - + - + - RT CT VFB 1 Reference Regulator VREF UVLO 3.4V 14V 2.5V R R 20kΩ VREF Sync 1.0VREF 2R 1.0V 250µA R 1.0mA 2R Error Amp 2 COMP1 ENABLE2 VFB 2 COMP2 Gnd Pwr Gnd R 1.0V Current Sense Comparator 2 Current Sense Comparator 1 R S Q R S R PWM Latch 2 PWM Latch 1 VCC VIN VOUT 1 VOUT 2 Sense1 Q1 Q2 RSense1 Sense2 RSense2 - + - Error Amp 1 VOUT 1 VOUT 2 COUT 2 COUT 1 5.0V Q Oscillator Internal Bias CF1 + L1 D1 L2 D2 + + CF2 RFB 1 RFB 2 RFB 3 RFB 4 VOUT 2 VOUT 1 Dual Boost Regulator VCC UVLO + Typical Application Diagram |
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Descrizione simile - CS5651 |
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