HVLED007TR datasheet(26/33 Pages) STMICROELECTRONICS

tên linh kiện	HVLED007TR

Giải thích chi tiết về linh kiện	Transition mode PFC controller for flyback converters

PDF	33 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

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26 / 33 page

Application information

HVLED007

26/33

DS12866 Rev 1

Figure 12. Functional schematic of the soft restart function

4.12

Suggested step-by-step design procedure of a Hi-PF QR

flyback converter based on the HVLED0007

The proposed design procedure can be outlined in fourteen steps, starting from the design

specification detailed in Table 9 and with reference to the typical application schematic

shown in Figure 13.

UVLO

RUN

STOP

RUN

STOP

Table 9. Basic electrical specification and key parameters of a Hi-PF QR flyback

Parameter

Symbol

Line voltage range

Vin_min - Vin_max

Line frequency range

fL_min - fL_max

Regulated output voltage

Vout

Output overvoltage level

Vout_OVP

Output current range

Iout_min - Iout_max

Maximum Vout ripple @ 2 fL_min

ΔVout_pk-pk

Expected efficiency at full load (estimated

value)

Voltage drop on secondary rectifier

(estimated value)

Reflected voltage

Minimum switching frequency

fsw_min

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