TDA4853 Datasheet, PDF (40/60 Pages) NXP Semiconductors – I2C-bus autosync deflection controllers for PC/TV monitors

Philips Semiconductors
I²C-bus autosync deflection controllers for
PC/TV monitors
Product specification
TDA4853; TDA4854
APPLICATION INFORMATION
handbook, full pagewidth
VHPLL2
2 VHDRV
SOFT START
2.5 V ^OTA
SQ
RQ
DISCHARGE
VCC
Vi
R6⁽¹⁾
6
3 VBDRV
L
D2
INVERTING
BUFFER
TR1
HORIZONTAL
OUTPUT
STAGE
1 horizontal
D1
flyback pulse
C1
5
VBIN
R1
R2 _C2
R3
3
4
VBOP
4 VBSENS
C4
CBOP
>10 nF
R5
R4
MGM080
EWDRV
For f < 50 kHz and C2 < 47 nF calculation formulas and behaviour of the OTA are the same as for an OP. An exception is the limited output current at
BOP (pin 3). See Chapter “Characteristics”, Row Head “B+ control section; see Figs 23 and 24”.
(1) The recommended value for R6 is 1 kΩ.
a. Feedback mode application.
handbook₁, ful_hl p_oa_rg_ize_ow_nid_tt_ah_l
flyback pulse
2 VHDRV
3 VBDRV
VBSENS = VBOP
4 VBSENS
ton
td(BDRV)
toff(min)
VRESTART(BSENS)
VSTOP(BSENS)
MBG600
b. Waveforms for normal operation.
c. Waveforms for fault condition.
Fig.23 Application and timing for feedback mode.
1999 Jul 13
40