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TL594Figure 15. Error–Amplifier Sensing TechniquesVrefR1R2VO12To OutputVoltage ofSystem+ErrorAmp–Positive Output VoltageVO = Vref 1 + R 1R233+ErrorAmp –Negative Output VoltageVO = VrefR1R212R1VrefR2VOTo OutputVoltage ofSystemFigure 16. Deadtime Control CircuitFigure 17. Soft–Start CircuitOutputControlOutputQ6RTVref5CTDT4R1R2OutputQVrefDT4RSCS30k0.001Max. % on Time, each output ≈ 45 –801 +R1R2Figure 18. Output Connections for Single–Ended and Push–Pull ConfigurationsOutputControlSingle–EndedQ1C1E1C2QC1.0 mA to500 mA2.4 V ≤ VOC ≤ VrefOutputControlPush–PullQ1C1E1C21.0 mA to 250 mA0 ≤ VOC ≤ 0.4 VQ2E2QEQ2E21.0 mA to 250 mA8 MOTOROLA ANALOG IC DEVICE DATA
Figure 19. Slaving Two or More Control CircuitsVrefTL594Figure 20. Operation with Vin > 40 V UsingExternal ZenerRSVCCRTCT65RTCTMasterVin > 40VVZ = 39V1N975A27012Gnd5.0VRefVref765RTCTSlave(AdditionalCircuits)Figure 21. Pulse Width Modulated Push–Pull Converter+Vin = 8.0V to 20V1+12VCC47T11N4934+VO = 28VIO = 0.2A1.0M33k0.01 0.012315–Comp–TL59416+OC VREF DT CT RT Gnd E1 E213 14 4 5 6 7 9 10+4.7k104.7k 10k 0.00115kC1C281147Tip32Tip32+5025VL11N4934240+5035V1.022k4.7k+ 5035VAll capacitors in µFTest Conditions ResultsLine Regulation Vin = 10 V to 40 V 14 mV 0.28%Load Regulation Vin = 28 V, IO = 1.0 mA to 1.0 A 3.0 mV 0.06%Output Ripple Vin = 28 V, IO = 1.0 A 65 mVpp P.A.R.D.Short Circuit Current Vin = 28 V, RL = 0.1 Ω 1.6 AEfficiency Vin = 28 V, IO = 1.0 A 71%L1 – 3.5 mH @ 0.3 AT1 – Primary: 20T C.T. #28 AWGT1 – Secondary: 12OT C.T. #36 AWGT1 – Core: Ferroxcube 1408P–L00–3CBMOTOROLA ANALOG IC DEVICE DATA9
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Page 3 and 4: TL594ELECTRICAL CHARACTERISTICS (VC
Page 5 and 6: TL594APPLICATIONS INFORMATIONDescri
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Page 11 and 12: TL594OUTLINE DIMENSIONS-T-SEATINGPL

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