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| TDA4855 Datasheet, PDF (28/44 Pages) NXP Semiconductors – Autosync Deflection Controller ASDC | |||
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Philips Semiconductors
Autosync Deï¬ection Controller (ASDC)
Preliminary speciï¬cation
TDA4855
handbook, full pagewidth
2 VHDRV
2.5 V OTA
7
SQ
RQ
VCC
R4
6
INVERTING
BUFFER
horizontal
flyback pulse
1
HORIZONTAL
OUTPUT
STAGE
3 VBDRV
EHT
transformer
D2
DISCHARGE
5
EHT adjustment R1
VBIN
3
4
R2
VBOP VBSENS
R3
D1
4
5 IMOSFET
TR1
MBG601
TR2
power-down
C1
CBSENS
>2 nF
CBOP > 4.7 nF
a. Forward mode application.
handboo1k, fhulol priazgoenwtaidlth
flyback pulse
2 VHDRV
3 VBDRV
VBOP
4 VBSENS
ton
td(BDRV)
5 IMOSFET
b. Waveforms for normal operation.
VBOP
toff (discharge time of CBSENS)
VRESTART(BSENS)
VSTOP(BSENS)
c. Waveforms for fault condition.
MBG602
Fig.13 Application and timing for feed forward mode.
1996 Jul 18
28
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