DC- DC COVERTER

CONFIGURATIONS

OUTPUT FILTER (see fig. 3)

COMPENSATION (see fig. 4)

STEP-DOWN

L= 47

µH

C= 47

µF

a) DOMINANT POLE

R = 50K

Ω

Cf = 47nF

R4 = 35K

Ω

b) 2 ZERO, 2 POLE

R2 = 11.18K

Ω

R3 = 100 K

Ω

C2 = 936pF

Rf = 16.65K

Ω

Cf = 5.6nF

R4 = 70K

Ω

STEP-UP

AND

TRANSFORMER

L= 47

µH

C= 47

µF

a) DOMINANT POLE

R = 100K

Ω

Cf = 220nF

R4 = 70K

Ω

c)

2 ZERO, 3 POLE

R1 = 500

Ω

C1 = 18nF

R2 = 20.8K

Ω

R3 = 250K

Ω

C2 = 636pF

Rf = 21.4K

Ω

Cf = 7.44nF

R4 = 200K

Ω

L= 11

µH

C= 47

µF

c)

2 ZERO, 3 POLE

R1 = 500

Ω

C1 = 18nF

R2 = 10.4K

Ω

R3 = 250K

Ω

C2 = 318pF

Rf = 21.4K

Ω

Cf = 3.7nF

R4 = 200K

Ω

SUGGESTED VALUES FOR OUTPUT FILTER AND COMPENSATION NETWORK

1

D96AU447A

VHIGH

VHIGH

+

-

12V

2

44

PINS: 1, 2, 44

8

D96AU448A

VHIGH

VHIGH

+

-

12V

7

9

PINS: 8, 7,9

TDA7278

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