AL1771/1772

Document number: DS41314 Rev. 1 - 2

8 of 24

www.diodes.com

August 2018

© Diodes Incorporated

AL1771/1772

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

—

PWM Dimming (count the number of continuous

cycles when LED short is detected)

—

15

—

Cycles

LED Short Protection Hiccup Time

—

—

128

—

ms

Open-detection Deglitch

100% duty-cycle

—

6

—

ms

PWM Dimming (count the number of continuous

cycles when LED open is detected)

—

15

—

Cycles

LED Open Protection Hiccup Time

—

—

128

—

ms

Soft-start Time

—

200

—

µs

LEDPG Full Current

—

—

32

—

µA

LEDPG LSB Current

—

—

0.5

—

µA

LEDPG Adjust Time

—

—

512

—

ms

Thermal Shutdown Threshold

—

—

+160

—

°C

Temperature Hysteresis

—

—

+30

—

°C

FAULTB Output Low Voltage

—

—

180

mV

FAULTB Leakage Current

—

—

1

μA

Thermal Resistance Junction-to-

Ambient

TSSOP-16EP (Type DX) (Note 5)

—

50

—

°C/W

Thermal Resistance Junction-to-

Case

TSSOP-16EP (Type DX) (Note 5)

—

15

—

°C/W

Note 5:

Device mounted on 2” x 2” FR-4 substrate PCB, 2oz copper, with minimum recommended pad on top layer and thermal vias to bottom layer ground plane.