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CS5124, CS5126 pdf datasheet (High Performance, Integrated Current Mode PWM Controllers)

  • 2013-09-22
  • 236.7KB
  • Points it Requires : 1

CS5124, CS5126 High Performance, Integrated Current Mode PWM ControllersThe CS5124/6 is a fixed frequency current mode controllerdesigned specifically for DC−DC converters found in thetelecommunications industry. The CS5124/6 integrates manycommonly required current mode power supply features and allowsthe power supply designer to realize substantial cost and board spacesavings. The product matrix is as follows:CS5124: 400 kHz w/VBIAS Pin, 195 mV first current sense threshold.CS5126: 200 kHz w/SYNC Pin, 335 mV first current sense threshold.The CS5124/6 integrates the following features: Internal Oscillator,Slope Compensation, Sleep On/Off, Undervoltage Lock Out, ThermalShutdown, Soft−Start Timer, Low Voltage Current Sense for ResistiveSensing, Second Current Threshold for Pulse−by−Pulse overcurrentProtection, a Direct Optocoupler Interface and Leading Edge CurrentBlanking.The CS5124/6 has supply range of 7.7 V to 20 V and is available in8 pin SOIC narrow package.Features• Line UVLO Monitoring• Low Current Sense Voltage for Resistive Current Sensing• External Synchronization to Higher or Lower Frequency Oscillator(CS5126 Only)• Bias for Startup Circuitry (CS5124 Only)• Thermal Shutdown• Sleep On/Off Pin• Soft−Start Timer• Leading Edge Blanking• Direct Optocoupler Interface• 90 ns Propagation Delay• 35 ns Driver Rise and Fall Times• Sleep Mode• Pb−Free Packages are Available

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