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16-bit Constant Current LED Driver with Error Detection

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DM137

Power Dissipation

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

0

20

40

60

80

100

120

140

160

Ambient Temperature Ta(°C)

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

HSOP28

SSOP28

QFN32