www.austriamicrosystems.com/Power-Management/AS1390

Revision 1.04

15 - 20

AS1390A, AS1390B

Datasheet - A p p l i c a t i o n I n f o r m a t i o n

9 Application Information

9.1 Typical Application

Figure 22. Typical Application

9.2 Recommended external Components

In order to reach the highest efficiency and best performance of the device we recommend to use the following external components.

For the capacitors and resistors standard available components can be used. Depending on the desired voltage and the current special

inductors and transistors should be used to guarantee pest performance for high current and high voltage operation. For the transistor we

recommend the SIR432DP from Vishay Siliconix (www.vishay.com) for the Inductors see Table 4.

Table 4. Recommended Inductors

Part Number

L

DCR

Current Rating Dimensions (L/W/T)

Manufacturer

74435573300

33µH

22m

Ω

8.5A

18.3x18.2x8.9mm

Würth Elektronik

www.we-online.de

VLCF4020T-470MR39

47µH

849m

Ω

0.39A

4.0x4.0x2.0mm

TDK

www.tdk.com