DM11A 查看數據表（PDF） - Silicon Touch Technology Inc.

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DM11A

8-bit Constant Current LED Driver

Silicon Touch Technology Inc. 

點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC.

DM11A

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:

Tj(junction temperature)(max)(°C)– Ta(ambient temperature)(°C)

Pd(max)(Watt) =

Rth(junction-to-air thermal resistance)(°C/Watt)

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

below:

2

SOP16

1.5

SOP16B

1

SSOP16

PDIP16

Rth(SOP16)=81.2°C/W

Rth(PDIP16)=85.0°C/W

Rth(SOP16B)=90°C/W

Rth(SSOP16)=115.9°C/W

0.5

0

0

20

40

60

80 100 120 140 160

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:

Pd(W) = VCC(V) IDD(A) + Vout0 Iout0 Duty0 +

+ Vout7 Iout7 Duty7 < Pd(max)(W)

8-bit Constant Current LED Driver

Version:A.003

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