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AS1100

Datasheet - A p p l i c a t i o n I n f o r m a t i o n

9.4 Calculating the Power Dissipation

The upper limit for power dissipation (PD) for the AS1100 is determined from the following equation:

(EQ 1)

Where:

DUTY = duty cycle set by intensity register

N = number of segments driven (worst case is 8)

Dissipation Example:

PD = 5.25V(0.5mA) + (5.25V - 1.8V)(31/32 x 40mA x 8) = 1.07W

Thus, for a PDIP package

Where:

Table 16. Package Thermal Resistance Data

Package

Thermal Resistance (

24 Wide SO

+85ºC/w