MIC3202 Просмотр технического описания (PDF) - Micrel

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Компоненты Описание

производитель

MIC3202

High-Brightness LED Driver with Integrated MOSFET and High-Side Current Sense

Micrel 

Micrel, Inc.

Typical Characteristics

Efficiency

vs. Input Voltage

100

6LED

8LED

4LED

95

2LED

90

1LED

85

80

ILED = 1A

L = 47uH

75

6

14

22

30

38

INPUT VOLTAGE (V)

1000

750

Switching Frequency

vs. Input Voltage

ILED = 1A

L = 47uH

500

1LED

250

2LED 4LED

6LED

8LED

0

6

14

22

30

38

INPUT VOLTAGE (V)

VIN Shutdown Current

vs. Input Voltage

0.5

0.4

0.3

0.2

0.1

0.0

6

125

VEN = 0V

14

22

30

38

INPUT VOLTAGE (V)

Enable Bias Current

vs. Enable Voltage

100

75

50

25

0

6

VIN = VEN

VLED =OPEN

ILED = 0A

14

22

30

38

ENABLE VOLTAGE (V)

September 2010

MIC3202

LED Current Normalized

vs. Input Voltage

1.02

1.01

ILED = 1A

L = 47uH

1.00

2LED

4LED

6LED

8LED

0.99 1LED

0.98

6

14

22

30

38

INPUT VOLTAGE (V)

Duty Cycle

vs. Input Voltage

100%

2LED

4LED

6LED

8LED

75%

50%

25%

1LED

ILED = 1A

L = 47uH

0%

6

14

22

30

38

INPUT VOLTAGE (V)

5.050

VCC Voltage

vs. Input Voltage

5.025

5.000

4.975

4.950

6

100

VLED = OPEN

ILED = 0A

14

22

30

38

INPUT VOLTAGE (V)

Dimming Bias Current

vs. Dimming Voltage

75

50

25

0

6

VIN = VDIM

VLED =OPEN

ILED = 0A

14

22

30

38

DIMMING VOLTAGE (V)

5

2.0%

1.0%

LED Current Accuracy

vs. Input Voltage

ILED = 1A

L = 47uH

0.0%

2LED 4LED

6LED

8LED

-1.0% 1LED

-2.0%

6

3.0

2.5

2.0

1.5

1.0

0.5

0.0

6

250

225

14

22

30

38

INPUT VOLTAGE (V)

VIN Supply Current

vs. Input Voltage

VOUT = OPEN

VCC = 5V

NO-SWITCHING

14

22

30

38

INPUT VOLTAGE (V)

CS Voltage

vs. Input Voltage

VCS MAX

VLED =3.5V

ILED =1A

200

175

VCS MIN

150

6

425

14

22

30

38

INPUT VOLTAGE (V)

Switch RDSON

vs. Input Voltage

375

325

275

225

6

VLED = 3.5V

ILED = 1A

14

22

30

38

INPUT VOLTAGE (V)

M9999-091710-A

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