9

RT4532

DS4532-00 May 2015

www.richtek.com

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Copyright 2015 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Shutdown Current vs. Input Voltage

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

2.5

3

3.5

4

4.5

5

5.5

Input Voltage (V)

Typical Operating Characteristics

PWM Dimming Operation

0

5

10

15

20

25

30

35

40

45

0

20406080

100

Dimming Duty (%)

Switching Frequency vs. Input Voltage

1.00

1.03

1.06

1.09

1.12

1.15

2.5

3

3.5

4

4.5

5

5.5

Input Voltage (V)

Efficiency vs. Input Voltage

0

10

20

30

40

50

60

70

80

90

100

2.5

3

3.5

4

4.5

5

5.5

Input Voltage (V)

Efficiency vs. Linear Brightness Control

30

40

50

60

70

80

90

100

0

25

50

75 100 125 150 175 200 225 250 275

Linear Brightness Control (Step)

Quiescent Current vs. Input Voltage

0

200

400

600

800

1000

1200

1400

2.5

3

3.5

4

4.5

5

5.5

Input Voltage (V)

Non-Switching