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TDA4867 View Datasheet(PDF) - Philips Electronics

Part Name
Description
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TDA4867 Datasheet PDF : 14 Pages
First Prev 11 12 13 14
Philips Semiconductors
Full bridge current driven vertical
deflection booster
Preliminary specification
TDA4867J
Example
Table 1 Values given from application diagram Fig.6
SYMBOL
Idefl
Ldeflcoil
Rdeflcoil
Rm
Rp
Rref
VFB
Tamb
Tdeflcoil
Rth(j-mb)
Rth(mb-amb)(1)
VALUE
0.71
5.2
5.4 [= 4.2 + 7% + R(ϑ)]
1 (+1%)
220
3.4
40
50
75
4
6
UNIT
A
mH
k
V
°C
°C
K/W
K/W
Note
1. Use heatsink compound.
Table 2 Calculated values
SYMBOL
VP
tflb
Ptot
Pdefl
PIC
Rth(tot)
Tj(max)(1)
VALUE
8.5
200
3.4
0.9
2.5
10
75
UNIT
V
µs
W
W
W
K/W
°C
Note
1. Tj(max) = PIC × [Rth(j-mb) + Rth(mb-amb)] + Tamb.
Calculation formulae for supply voltage:
Vb1 = Vsat(VP-OUTA) + Rdeflcoil × Idefl U’L + Rm × Idefl + Vsat(OUTB-GND)
Vb2 = Vsat(OUTA-GND) + Rdeflcoil × Idefl + U’L + Rm × Idefl + Vsat(VP-OUTB)
for Vb1 > Vb2 : VP = Vb1
for Vb2 > Vb1 : VP = Vb2
where:
U’L = Ldeflcoil × 2 × Idefl × fv
fv = vertical deflection frequency.
Calculation formulae for power consumption:
PIC = Ptot Pdefl
Ptot = VP × -I-d-2--e--f-l + VP × 0.02 A + 0.1 W + VFB × IFB
Pdefl = 13-- × (Rdeflcoil + Rm) × Id2efl
where:
PIC = power dissipation of the TDA4867J
Ptot = total power dissipation
Pdefl = power dissipation of the deflection coil.
Calculation
formulae
for
flyback
time
(tflb):
tflb
R-----d---eL--f-l-dc--e-o--fi-ll-c--+o---i-l-R----m--
×
ln
-VV----FF---BB----+–-----((--RR-----dd--ee---ff-ll-cc--oo---ii-ll--+-+----RR-----mm----))---×-×----I-I-dd---ee--ff-ll
2003 Feb 05
11
 

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