L4970A Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

L4970A

10A SWITCHING REGULATOR

STMicroelectronics 

L4970A

Figure 6a: P.C. Board (components side) and Components Layout of Figure 5 (1:1 scale).

PARTS LIST

R1 = 30KΩ

R2 = 10KΩ

R3 = 15KΩ

C1, C2 = 3300µF 63VL EYF (ROE

C3, C4, C5, C6 = 2.2µF

C7 = 390pF Film

R4 = 16KΩ

R5 = 22Ω 0,5W

R6 = 4K7

C8 = 22nF MKT 1817 (ERO)

C9 = 2.2nF KP1830

R7 = 10Ω

C10 = 220nF MKT

R8 = see tab. A C11 = 2.2nF MP1830

R9 = OPTION **C12, C13, C14 = 220µF 40VL EKR

R10 = 4K7

C15 = 1µF Film

R11 = 10Ω

D1 = MBR 1560CT (or 16A/60V or equivalent)

L1 = 40µH

core 58071 MAGNETICS

27 TURNS Ø 1,3mm (AWG 16)

COGEMA 949178

* 2 capacitors in parallel to increase input RMS current capability

** 3 capacitors in parallel to reduce total output ESR

Table A

V0

12V

15V

18V

24V

R9

4.7kΩ

4.7kΩ

4.7kΩ

4.7kΩ

R7

6.2kW

9.1kΩ

12kΩ

18kΩ

Table B

SUGGESTED BOOTSTRAP CAPACITORS

Operating Frequency

f = 20KHz

f = 50KHz

f = 100KHz

f = 200KHz

f = 500KHz

Bootstrap Cap.c10

≥680nF

≥470nF

≥330nF

≥220nF

≥100nF

9/21

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