16-bit Constant Current LED Driver with Error Detection

Version:A.002

Page 21

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DM13G

Power Dissipation

Notice that the power dissipation of a semiconductor chip is limited to its package and

ambient temperature, in which the device requires the maximum output current calculated

for given operating conditions. The maximum allowable power consumption can be

calculated by the following equation:

Pd(max)(Watt) =

The relationship between power dissipation and operating temperature can be refer to the

figure below:

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

0

2040

6080

Ambient Temperature Ta(℃)

The power consumption of IC can be determined by the following equation and should be

less than the maximum allowable power dissipation:

Tj(max)=150

°C

°C/Watt

°C/Watt

°C/Watt

QFN32

TSSOP28E

SSOP28