TK75003 Ver la hoja de datos (PDF) - Toko America Inc
Número de pieza
componentes Descripción
Lista de partido
TK75003 Datasheet PDF : 14 Pages
| |||
TK75003
Select for R7:
APPLICATION INFORMATION (CONT.)
R7 = 4.3 kohms
Resistance of current-sense resistor R8 (Note 2):
R8 = (VCCD - ISC(PK) x R7 x D) / IL1(PK) = 0.201 ohms
Select for R8:
R8 = 0.18 ohms
Note 1: This value of R7 ensures that the line current will be zero around
the zero-crossing of the line voltage, which is the required condition for
low-distortion line current.
Note 2: This value of R8 ensures that the sum of the voltage drop across
R8 (caused by the peak inductor current) and the voltage drop across R7
(caused by the instantaneous value of the stabilizing current) is equal to
the threshold voltage of the current-control detector at the peak of the
line voltage.
F1
2 A / 250 V
TH1
10 Ω
85-265
VAC
C1
0.1 µF
B1
600 V, 1.5 A
R1b
24 k
0.5 W
R1a
24 k
0.5 W
R2
5.6 k
D4
30 V
C10
1 nF
400 V
R4
150 k
C2
470 µF
R3
5.6 k
L1
2.5 mH
t: 220
D1
1N4148
t:9
ETD-29 core
gap in center leg
C3
100 nF
C4
100 nF
D2 IN4148
FB
VCC
Q1
IRF840
R5
DRV
10
D3
HFA04TB60
R11a
200 k
0.25 W
R11b
200 k
0.25 W
+
380 V DC
100 W
R9
33 k
Q2
2907A
R10
1.2 k
C8
100 µF
400 V
C7
0.33 µF
R13
GND
CT
R6
100 k
U1
TK75003
C5
820 pF
5%
R7
51
C6
10 nF
R8 U2
0.18 TL431
0.5 W
R12
2.43 k
-
4.3 k
FIGURE 9: BOOST POWER FACTOR CORRECTOR APPLICATION CIRCUIT
January 1999 TOKO, Inc.
Page 13
Share Link: 