AN8027 Просмотр технического описания (PDF) - Panasonic Corporation

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производитель

AN8027

AC-DC switching power supply control IC with standby mode

Panasonic Corporation 

Voltage Regulators

s Application Notes (continued)

[1] Operation descriptions (continued)

3. Control waveform timing chart (continued)

2) Standby (Intermittent) mode (for light loads)

On

0V

(A)Voltage on bias winding

Off

Off

AN8027, AN8037

Off

(B)TR pin voltage

0V

4V

VFB voltage

2.4 V

(C)CF pin voltage

0V

(D)Out pin voltage

Off

0V

TON is acceptable

only after CF pin

voltage reaches 4 V.

TOFF(min)

T(OFF)

On

On

Off

Off

Current on

bias winding

0A

(E)Current

on primary

winding

(F)Current

on secondary

winding

TON is unacceptable

during TOFF(min) period.

<Circuit diagram>

(B)

(E)

(F)

AN8027,

CLM

ATCNRF8037VOCuCt

(D)

(C)

(A)

(G)

11

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