RT8560 datasheet(7/15 Pages) RICHTEK

7 / 15 page

RT8560

DS8560-01 April 2011

www.richtek.com

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Threshold of ACTL

VACTL

LED Current Off

0.2

Input Current of DCTL

IDCTL

0.3V

≤ VDCTL ≤ 6V

μA

PWM Boost Converter

Switching Frequency

840

1000

1160

kHz

Maximum Duty Cycle

Minimum On Time

200

Regulated VLED

Highest Voltage LED String

0.9

Amplifier gm

220

μA/V

Amplifier (gm) Output Current

2.4V > VC > 0.2V

±30

μA

VC Threshold

PWM Switch Off

0.7

SW On Voltage

ISW = 0.5A

0.4

SW Current Limit

ILIM

1.2

1.5

OVP & Soft Start

OVP Threshold

VOVP

2.5

OVP Input Current

IOVP

VOVP ≤ 2.5V

Soft Start Current

ISS

VSS = 0V

μA

Note 1. Stresses listed as the above

“Absolute Maximum Ratings” may cause permanent damage to the device. These are for

stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the

operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended

periods may remain possibility to affect device reliability.

Note 2.

θJA is measured in the natural convection at TA = 25°C on a high effective four layers thermal conductivity test board of

JEDEC 51-7 thermal measurement standard. The case point of

θJC is on the expose pad for the WQFN package.

Note 3. Devices are ESD sensitive. Handling precaution is recommended.

Note 4. The device is not guaranteed to function outside its operating conditions.

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