TD3843A TMC, TD3843A Datasheet

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... The TD3842A and TD3844A have UVLO thresholds of 16V (on) and 10V (off) The TD 3843A and TD3845A are 8.4V (on) and 7.6V (off) The TD3842A and TD3843A can operate within 100% duty cycle. The TD3844A and TD3845A can operate with 50% duty cycle. ...

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... F requency C hange with Voltage (V F requency C hange with Temperature low Os cillator Voltage S wing (P eak±to±P eak) Dis charge C urrent ( low TMC DataSheet4U.com 4 DataSheet U .com TD3842A / 3843A / 3844A / 3845A R ating = [Note 2 DataSheet4U ...

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... Output Voltage Time (C Output Voltage F all Time (C UNDE R V OLTA OUT ION S tartup T hres hold TD 3842A/TD3844A TD 3843A/TD3845A Minimum Operating Voltage After Turn On TD3842A/TD3844A T D3843A/TD3845A TMC DataSheet4U.com 4 DataSheet U .com TD3842A / 3843A / 3844A / 3845A TD 3842A /43A /44A /45A S ymbol Min = 2 ...

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... Duty C ycle TD3842A/TDd3843A Maximum TD3844A/TDd3845A Minimum TOTA ower S upply C urrent (Note 4) S tartup 6.5 V for TD3843A for TD 3842A) Operating ower S upply Zener Voltage (I 4. Adjus t V above the S tartup thres hold before s etting ...

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... example, an externally latched shut –down may be accomplished by adding an SCR which be reset by cycling Vcc below the lower UVLO threshold this point the reference turns off allowing the SCR to reset. TMC DataSheet4U.com 4 DataSheet U .com ...

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... Temperature (°C) DataSheet4U.com RT 1 Error Amp 2 Adjust ON/OFF Command to rest of IC TD3842A/44A Von=16V, Voff=10V TD3843A/45A Von=8.4V, Voff=7.6V Istart Temperature Drift 550 500 Vcc=9V 450 400 350 300 250 -50 - 100 125 150 Temperature (°C) ...

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... ERROR AMPLIFIER CONFIGURATION SLOPE COMPENSATION A fraction of the oscillator ramp can be resistively summed with the current sense signal to provide slope compensation for converts requiring duty cycles over 50%.Note that capacitor C, forms a filter with R2 to suppress the leading edge switch spikes. TMC DataSheet4U.com 4 DataSheet U ...