UCC2818 设计文档.pdf

UCC3818 DESIGN EQUATIONS - PMP669). sec − 9 Ω − 9 − 3 ms := ns := sec10⋅ mΩ := nC := coul10⋅ mW := watt10⋅ 1000 1000 1 1 t := 0ms⋅ , .. 1000Fline⋅ Fline ()sf :=2⋅π ⋅f⋅j 5 low := 1Hz⋅ high := 10 ⋅Hz N := 20000 high log   low stepi⋅ step := i := 0..N − 1 f := low10⋅ N − 1 i Set Boost Output Voltage: Vref := 7.5volt⋅ Vboost := 380volt⋅ R1 := 249k⋅ Ω R4 := R1 Rin := R1 + R4 VboostR7⋅ Vref = R7 + R1 + R4 R1 + R4 R7 := Vref⋅ R7 = 10.027kΩ −Vref + Vboost R7 := 10k⋅ Ω Vref Vboost := ⋅(R7 + R1 + R4) R7 Vboost = 381volt Boost Inductor: Po := 1100watt⋅ fs := 100kHz⋅ η2 := 0.95 PWM Efficiency η1:= 0.95 Boost Efficiency Fline ≡ 50Hz⋅ AC line frequency Po 3 Pin := Pin = 1.219 × 10 watt η1⋅η2 Vin_min := 170volt⋅ 0.2⋅ 2⋅Pin ∆I := ∆I = 2.028amp Vin_min Vin_min⋅ 2 D := 1 − D = 0.369 Vboost Vin_min⋅ 2⋅D Lboost := Lboost = 0.437mH Lboost := 0.5mH⋅ ∆Ifs⋅ Vin_min⋅ 2⋅D ∆I := ∆I = 1.774amp Lboostfs⋅ 2⋅Pin ∆I Ip := +