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TS3842BCD 데이터시트(PDF) 1 Page - List of Unclassifed Manufacturers |
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1 / 20 page Block Diagram Ordering Information The TS3842B and TS3843B series are high performance fixed frequency current mode controllers. This is specifically designed for Off-Line and DC-to-DC converter applications offering the designer a cost effective solution with minimal external components. This 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 totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, programmable output deadtime, and a latch for single pulse metering. This device is available in 8-pin dual-in-line plastic packages as well as the 8-pin plastic surface mount (SOP-8). The SOP-8 package has separate power and ground pins for the totem pole output stage. The TS3842B has UVLO thresholds of 16V (on) and 10V (off), ideally suited for off-line converters. Features General Description TS3842B/3843B High Performance Current Mode Controller Trimmed Oscillator Discharge Current for Precise Duty Cycle Control Current Mode Operation to 500KHz Automatic Feed Forward Compensation Latching PWM for Cycle-By-Cycle Current Limiting Internally Trimmed Reference with Undervoltage Lockout High Current Totem Pole Output Undervoltage Lockout with Hystersis Low Start-Up and Operating Current SOP-8 DIP-8 5.0V Reference Latching PWM VCC Undervoltage Lockout Oscillator Error Amplifier 7(12) VC 7(11) Output 6(10) Power Ground 5(8) 3(5) Current Sense Input Vref 8(14) 4(7) 2(3) 1(1) RT/CT Voltage Feedback Input R R + - Vref Undervoltage Lockout Output Compensation VCC The document contains information on a new product.Specifications and information herein are subject to change without notice. Designed for Off-Line and DC-to-DC converter applications. TS3842/3843BCD DIP-8 TS3842/3843BCS SOP-8 -20 to +85 + DEVICE (Ambient) PACKAGE OPERATING TEMPERATURE |
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