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KA3842 Datasheet(PDF) 1 Page - Wing Shing Computer Components |
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KA3842 Datasheet(HTML) 1 Page - Wing Shing Computer Components |
1 / 5 page ![]() CURRENT −−MODE PWM CONTROLLER The KA3842A are fixe frequency current-mode PWM controller. They are specially designed for OFF −Line and DC−to−DC converter applications with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totempole output ideally suited for driving a power MOSFET. Protection circuity includes built under −voltage lockout and current limiting. The The KA3842A ,KA384AM can The KA3842A have Start-Up Current 0,45 mA FEATURES • Low Start-Up Current • Maximum Duty Cycle • U/V Lockout With Hysteresis • Operating Freguency Up To 500khz ordering information Device Package Operating temperature KA3842AM SO-8 0 to +700C BLOCK DIAGRAM Absolute Maximum Ratings Characteristic Symbol Value Unit Supply Voltage VCC 30 V Output Current IO ±1 A Analog Inputs VI −0.3 to VCC V Error Amp Output Sink Current ISINK (E.A) 10 mA Power Dissipation (TA=250C) PO 1 W Wing Shing Computer Components Co., (H.K.)Ltd. Tel:(852)2341 9276 Fax:(852)2797 8153 Homepage: http://www.wingshing.com E-mail: wsccltd@hkstar.com Linear Integrated Circuit have UVLO thresholds of 16 V(on) and 10 V (off). operate within 100% duty cycle PIN CONNECTION SO-8 1 in applications using the same external components as Motorola's parts,among others .The DIP-8 SO-8 " DIP-8 DIP-8 " " KA3842A KA3842AM KA3842AMM KA3842AN KA3842AMN KA3842AM KA3842A,KA3842AM The KA3842A has been proven KA3842AM has been optimized for compatibility with Samsung's parts Many applications can use either KA3842A or KA3842AM KA3842AM |
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