NJM3771 데이터 시트보기 (PDF) - Japan Radio Corporation
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NJM3771 Datasheet PDF : 9 Pages
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NJM3771
General
Phase inputs
A logic HIGH on a Phase input gives positive current flowing out from MA into MB. A logic LOW gives a current in
the opposite direction.
Slow/fast current decay
A logic HIGH on the CD input gives slow current decay, a logic LOW gives fast current decay.
Heat sinking
Soldering the four center pins onto a free PCB copper area of 20 cm2 (approx. 1.8" x 1.8", copper foil thickness =
35 µm) permits the circuit to operate with a maximum of 320 mA output current, both channels driving, at ambient
temperatures up to +70°C. Consult figures 9 and 14 in order to determine the necessary copper area for heat
sinking if higher currents are required.
Thermal shutdown
The circuit is equipped with a thermal shutdown function that reduces the output current at chip temperatures
above +160°C.
Thermal resistance [°C/W]
80
70
60
50
24-pin EMP
40
30
20
5
10 15 20 25 30 35
PCB copper foil area [cm2]
PLCC package
DIP package
Figure 9. Thermal Resistance vs. PC Board copper area and suggested layout
22-pin
DIP
28-pin
PLCC
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