LDS8161/41

© 2009 IXYS Corp.

3

Doc. No. 8141/61_DS, Rev. N1.0

Characteristics subject to change without notice

RECOMMENDED OPERATING CONDITIONS

Parameter

Rating

Unit

2.5 to 5.5

V

0 – 31.875

mA

191.25

mA

Junction Temperature Range

-40 to +125

°C

Typical application circuit with external components is shown on page 1.

ELECTRICAL OPERATING CHARACTERISTICS

Name

Conditions

Min

Typ

Max

Units

LEDx Channel Current DAC Range

0

31.875

mA

# of LEDx Current steps (linear steps)

256

steps

LEDx Current DAC Resolution/step

0.125

mA

Standby (no I

125

µA

0.6/0.45

mA

Quiescent Current

6/4 Channels at 100%

DC PWMs and Temp

De-Rating Active

0.45/0.35

0.35

mA

Shutdown Current

0.5

1

µA

LED Current Accuracy

5 mA

±1.5

%

LED Channel Matching

±1.5

%

Line Regulation

2.7 V

≤V

2

%/V

Load Regulation

1

0.2 V < Vdx < 1.2 V

1

%/V

Dropout Voltage

2

1 mA

50

75

mV

PWM Frequency

285

Hz

# of PWM duty cycle steps

Log Mode steps

256

Minimum PWM On Time

13.7

µs

PWM resolution

Log Mode

12

bits

PWM Step Size

Log Mode

0.17

dB

1-x Scale Mode

-7

0



of



PWM Steps for current de-rating

2-x Scale Mode

-14

0

PWM

Steps/5

De-rating Temperature Adjust Steps

5

Programmable De-rating Start

Temperature (Tj) Range (typical)

30

55

80

Programmable LED Shutdown

Temperature(Tj) Range (typical)

80

105

120

-1

1

Input current

Normal Standby

5

µA

High

1.2

EN Pin

Logic Level

Low

Active Mode or Normal

Standby Mode

0.4

V

Input Current Limit

450

mA

Thermal Shutdown

150

Thermal Hysteresis

20

°C

Soft ramp disabled

10

ms

Wake-up/Shutdown Delay Time from EN

Raising/Falling Edge

Soft ramp enabled

250

ms

Output short circuit Threshold

3

0.14

V

Note:

3. Minimum LED forward voltage, which will be interpreted as “LED SHORT” condition