RT4531 datasheet(7/14 Pages) RICHTEK

7 / 14 page

RT4531

DS4531-01

July 2016

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Typical Operating Characteristics

Switching Frequency vs. Input Voltage

0.7

0.8

0.9

1.0

1.1

1.2

1.3

2.5

3.5

4.5

5.5

Input Voltage (V)

Switching Frequency vs. Temperature

0.88

0.93

0.98

1.03

1.08

1.13

-50

-25

100

125

Temperature (°C)

Sense Voltage vs. Output Current

0.310

0.311

0.312

0.313

0.314

0.315

2.5

7.5

12.5

17.5

Output Current (mA)

Dimming Linearity

0.000

0.002

0.004

0.006

0.008

0.010

0.012

0.014

0.016

0.018

0.020

0.022

2040

6080

100

Dimming Duty Cycle (%)

VIN = 3.6V

ILED1

ILED2

Efficiency vs. Output Current

0.01 0.01 0.01 0.01 0.01 0.02 0.02 0.02

Output Current (A)

VIN = 3.6V, VOUT = 31V, 10s2p, 20mA/string

Efficiency vs. Input Voltage

100

2.5

3.5

4.5

5.5

Input Voltage(V)

VOUT = 31V, 10s2p

ILED = 20mA

ILED = 10mA

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