TDA4865J Datasheet, PDF (11/18 Pages) NXP Semiconductors – eflection boosters for use in vertical deflection systems for frame frequencies up to 200 Hz.

NXP Semiconductors
TDA4865J; TDA4865AJ
Vertical deflection booster
TDA4865J_TDA4865AJ_2
Product data sheet
Table 9. Calculated values
Symbol
Value
TDA4865J
V_P1
V_N
P_tot
P_defl
P_IC
R_th(tot)(max)
T_j(max)[1]
t_flb
8
−13
8.5
3.85
4.65
12.9
93
650
[1] With a heat sink of 2 K/W.
Unit
TDA4865AJ
15
V
−15
V
12.1
W
3.85
W
8.25
W
7.27
K/W
103.6
°C
720
µs
V_P1, V_N and V_FB are referenced to ground of application; voltages are calculated with
+10 % tolerances.
The calculation formulae for supply voltages are as follows:
V_P1 = – V_o(sat)p + (R1 + R_deflcoil) × I_defl(max) – U'_L + U_D1
(1)
V _N = V_o(sat)n + (R1 + R_deflcoil) × I_defl(max) + U'_L
(2)
where:
U’_L = L_deflcoil × 2I_{defl(max)} × f_v
f_v = vertical deflection frequency
U_D1 = forward voltage drop across D1
The calculation formulae for power consumption is:
P_IC = P_tot – P_defl
(3)
P_tot = (V _P1 – U_D1) × -^I--^d---^e--^f--^l₄-⁽--^m----^a--^x--⁾ + V _N × -^I--^d---^e--^f--^l₄-⁽--^m----^a--^x--⁾ + (V _P1 + V _N ) × 0.01 + 0.2
(4)
P_defl
=
-^R---^d---^e--^f--^l--^c--^o---ⁱ-^l---⁺-----^R----¹-
3
×
I
2
d
e
fl(ma
x)
(5)
where:
P_IC = power dissipation of the IC
P_tot = total power dissipation
P_defl = power dissipation of the deflection coil
Calculation formulae for maximum required thermal resistance for the heat sink at
T_j(max) = 110 °C:
R_th(tot) = R_{th( j-mb)} + R_th(mb-h) + R_th(h-a)
R_th(h-a) = ^T-----^j--⁽--^m---^a--_P-^x--⁾-_I--^–_C-----^T----^a--^m----^b – R_{th( j-mb)} – R_th(mb-h)
Rev. 02 — 3 November 2006
(6)
(7)
© NXP B.V. 2006. All rights reserved.
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