LM56 National Semiconductor, LM56 Datasheet - Page 2

• Manufacturer Part Number: LM56
• Description: Dual Output Low Power Thermostat
• Manufacturer: National Semiconductor

www.national.com
Typical Application
V
V
where:
(R1 + R2 + R3) = 27 k
V
R1 = V
R2 = (V
R3 = 27 k
T1
T2
T1 or T2
= 1.250V x (R1)/(R1 + R2 + R3)
= 1.250V x (R1 + R2)/(R1 + R2 + R3)
T1
T2
/(1.25V) x 27 k
= [6.20 mV/˚C x T] + 395 mV therefore:
/(1.25V) x 27 k ) − R1
− R1 − R2
and
FIGURE 1. Microprocessor Thermal Management
2
DS012893-3