L6221N(1998) データシートの表示（PDF） - STMicroelectronics

部品番号

コンポーネント説明

メーカー

L6221N
(Rev.:1998)

QUAD DARLINGTON SWITCH

STMicroelectronics 

L6221A - L6221AD - L6221N

MOUNTING INSTRUCTION

The Rth j-amb of the L6221A can be reduced by sol-

deringthe GND pins to a suitablecopperarea of the

printed circuit board (Fig. 23) or to an external

heatsink (Fig. 24).

The diagram of figure 25 shows the maximum dis-

sipable power Ptot and the Rth j-amb as a function of

the side ” α” of two equal square copper areas hav-

Figure 23 : Example of P.C. Board Copper Area

Which is Used as Heatsink

ing a thickness of 35µ (1.4 mils). During soldering

the pins temperature must not exceed 260 °C and

the soldering time must not be longer than 12 sec-

onds.

The external heatsink or printed circuit copper area

must be connected to electrical ground.

Figure 24 : External Heatsink Mounting Example

Figure 25 : Maximum Dissipable Power and Junc-

tion to Ambient Thermal Resistance

versus Side ” α”

Figure 26 : Maximum Allowable Power Dissipa-

tion versus Ambient Temperature

11/15

Share Link: