ULN2068B datasheet(5/8 Pages) STMICROELECTRONICS

Nome de Peças	ULN2068B

Descrição Electrónicos	50V - 1.5A QUAD DARLINGTON SWITCHES

PDF	8 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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MOUNTING INSTRUCTIONS

The Rth j-amb can be reduced by soldering the GND

pins to a suitable copper area of the printed circuit

board (Fig. 12) or to an external heatsink (Fig. 13).

The diagram of Figure 14 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-

ing a thickness of 35

µ (1.4mils).

During soldering the pins temperature must not ex-

ceed 260

°C and the soldering time must not be

longer than 12 seconds.

The external heatsink or printed circuit copper area

must be connected to electrical ground.

Figure 12 : Example of P.C. Board Area which is

Used as Heatsink.

Figure 13 : External Heatsink Mounting Example.

Figure 14 : Maximum Dissipable Power and Junc-

tion to Ambient Thermal Resistance

vs. Side ”

α”.

Figure 15 : Maximum Allowable Power Dissipa-

tion vs. Ambient Temperature.

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