DM134

點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC.

16-Bit Constant Current LED Drivers

-12-

Version

：A.013

Note

As the power dissipation of a semiconductor chip is limited by its package and ambient

temperature, this device requires a maximum output current given by an operating condition.

The maximum allowable power consumption (Pd (max)) of this device is calculated as

follows:

)

/

(

Rth

)

)(

)

emperature

(ambient t

Ta

-

(max)

e)

temperatur

(junction

(Tj

)

(max)(

Watt

C

C

Watt

Pd

°

°

=

Based on the Pd (max), the maximum allowable current can be calculated as follows:

Imax - Ta ( DM136 )

0.00

2.00

4.00

6.00

8.00

10.00

12.00

14.00

16.00

0

20

40

60

80

100 120 140 160

Ta

Imax - Ta ( DM135 )

0.00

10.00

20.00

30.00

40.00

50.00

60.00

0

20406080

100 120 140 160

Ta

Imax - Ta ( DM134 )

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0

20

40

60

80

100 120 140 160

Ta

Pd - Ta

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

0

20

40

60

80

100 120 140 160

Ta

Vdd = 5V

Vout = 1.5V

16bit Active

Vdd = 5V

Vout = 1.5V

16bit Active

Vdd = 5V

Vout = 1.5V

16bit Active

DIP

QFN

SSOP

DIP

QFN

SSOP

SSOP

QFN

DIP

SSOP

DIP

QFN

SOP

SOP

SOP

SOP