Q67100-A8310 Ver la hoja de datos (PDF) - Infineon Technologies

Número de pieza

componentes Descripción

Fabricante

Q67100-A8310

Dimmer IC for Halogen Lamps

Infineon Technologies 

SLB 0587

Application Circuit (Figure 4)

The suggested circuit design of the SLB 0587 performs the following functions:

q Current supply for the circuits (R 1, R 3, C 2, C 3, C 6, D1, D2).

q Filtered signal for synchronization of the internal time base (PLL circuit) with line frequency

(R 2, C 4).

q For specific applications C 4 and R 2 can be varied according to figure 5. An increase for C

4 and R 2 causes a slight reduction of the lamp brightness but at the same time an im-

provement of interference immunity of the internal PLL against line voltage spikes.

q Integration unit for internal PLL circuit (C 5, R 10)

Combining R 10 and C 5 (figure 6) determines within certain limits the following factors

– Start-up behaviour of internal PLL after line failure

– Ripple control behaviour (periodic shifts of lamp brightness if ripple control signals

represent)

q Protection of the user (R 8, R 9)

q Sensitivity setting of the sensor (R 7)

q Current limitation in the case of reverse polarity of the extension (R 5, R 6)

Both resistors can be omitted if no extension is connected. In this case pin 6 must be con-

nected to V SS (pin 7).

q D3: Reduction of positive voltages which may arise during the triggered state at the gate of

some triacs, to values below V DD + 0.3 V by diode forward voltage. If suitable triacs are used,

diode D3 can be omitted.

q Dr, C 1 are used for EMI suppression.

Depending on the application the EMI suppression is to be dimensioned in acc. with

VDE 0875/part 1 (general)

VDE 0550/part 6 (chokes)

or corresponding the national regulations e.g. 1.4....2 mH, Q = 11....24

Semiconductor Group

9

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