AN2435 datasheet(13/25 Pages) STMICROELECTRONICS

부품명	AN2435

상세설명	TM sepic converter in PFC pre-regulator

PDF	25 Pages

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제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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13 / 25 page

AN2435

Practical design example of a sepic converter

13/25

Figure 9.

Equivalent current source of the sepic converter

Figure 10.

Small signal model for the TM sepic converter

Practical design example of a sepic converter

A practical example of a sepic converter is described below.

2.1

Design specifications

For the input data, the design specifications are needed.

Load

ID1AVG

Load

2 ⋅

ACRMS

2 ⋅

Vˆ

Table 1.

Design specification

Quantity

Value

Mains voltage range: VINMIN (RMS) – VINMAX (RMS)

175 VACRMS - 265 VACRMS

Regulated DC output voltage

200 V

Rated Output Power: PO

65 W

Minimum switching frequency: fswmin

45 kHz

Maximum over-voltage admitted

: ∆V

OVP

40 V

Maximum output voltage ripple

∆V

20 V

Expected efficiency:

90 %

Maximum mains RMS current

INRMSMAX

η V

ACMIN

•

----------------------------

420mA

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