KA3846
KA3846 Datasheet
KA3846
| Part | Datasheet |
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KA3846 |
KA3846 (pdf) |
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| KA3846 SMPS Controller • Automatic Feed Forward Compensation • Programmable Pulse by Pulse Current Limiting • Automatic Symmetry Correction in Push-Pull Configuration • Enhanced Load Response Characteristics • Parallel Operation Capability for Modulator Power Systems • Differential Current Sense Amplifier with Common Mode Range • Double Pulse Suppression • 200mA Totem-Pole Outputs • ±2% Band gap Reference • Under-Voltage Lockout • Soft-Start Capability • Shutdown Terminal • 500KHz Operation The KA3846 control IC provides all of the necessary features to implement fixed frequency, current mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel “power module,, while maintaining equal current sharing. Protection circuitry includes built-in-under-voltage lockout and programmable current limit in addition to soft-start capability. A shutdown function is also available which can initiate either a complete shutdown with automatic restart or latch the supply off. Other features include fully latched operation, double pulse suppression, deadtime adjust capability, and ±2% trimmed bandgap reference. The KA3846 features low outputs in the OFF state. 16-DIP Internal Block Diagram 2000 Fairchild Semiconductor International KA3846 Absolute Maximum Ratings Parameter Value Unit Supply Voltage Collector Supply Voltage Output Current, Sink of Source Peak Reference Output Current IREF Soft Start Sink Current ISINK S.S Sync Output Current ISYNC Error Amplifier Output Current IO E.A Oscillator Changing Current ICHG OSC Power Dissipation TA = 25°C 1000 Operating Temperature TOPR 0 ~ +70 Storage Temperature TSTG -65 ~ +150 Lead Temperature Soldering, 10sec TLEAD +300 Electrical Characteristics VCC=15V, TA=0°C to +70°C, unless otherwise specified Ordering Information Product Number KA3846 Package 16 DIP Operating Temperature 0 ~ + 70°C KA3846 KA3846 LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR INTERNATIONAL. As used herein: Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 7/13/00 0.0m 001 2000 Fairchild Semiconductor International |
| More datasheets: M85049/1716N05 | M85049/1716N06 | M85049/1716W02 | M85049/1712W03 | M85049/1722N03A | M85049/17-10N03 | M85049/1724W09 | M85049/1710W02 | M85049/17-24N08 | 01500603Z |
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