CS52843

www.DataSheet4U.com CS52843 Current Mode PWM Control Circuit The CS52843 provides all the necessary features to implement off−line fixed frequency current−mode control with a minimum number of external components. The CS52843 incorporates a new precision temperature−controlled oscillator to minimize variations in frequency. An undervoltage lockout ensures that VREF is stabilized before the output stage is enabled. In the CS52843 turn on is at 8.4 V and turn off at 7.6 V. Other features include low start−up current, pulse−by−pulse current limiting, and a high−current totem pole output for driving capacitive loads, such as gate of a power MOSFET. The output is low in the off state, consistent with N−channel devices. http://onsemi.com 8 1 SO−8 D SUFFIX CASE 751 Features Optimized for Off−Line Control Internally Temperature Compensated Oscillator VREF Stabilized before Output Stage is Enabled Very Low Start−Up Current 300 μA (typ) Pulse−by−Pulse Current Limiting Improved Undervoltage Lockout Double Pulse Suppression 2.0% 5.0 Volt Reference High Current Totem Pole Output 14 1 SO−14 D SUFFIX CASE 751A PIN CONNECTIONS AND MARKING DIAGRAMS COMP VFB Sense OSC 1 52843 ALYWX 1 CS52843 AWLYWW 14 VREF VCC VOUT GND COMP NC VFB NC Sense NC OSC A WL, L YY, Y WW, W VREF NC VCC VCC Pwr VOUT Pwr GND GND = Assembly Location = Wafer Lot = Year = Work Week ORDERING INFORMATION Device CS52843ED8 CS52843EDR8 CS52843ED14 CS52843EDR14 Package SO−8 SO−8 SO−14 SO−14 Shipping ...