MIC2298-15YML datasheet(4/13 Pages) MICREL

Part #	MIC2298-15YML

Description	3.5A Minimum, 1MHz Boost High Brightness White LED Driver

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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4 / 13 page

Micrel, Inc.

MIC2298

October 2007

4

M9999-101707-B

Typical Characteristics

0

4

8

12

16

20

02468

10

12

INPUT VOLTAGE (V)

Input Current

vs. Input Voltage

1.8

1.9

2.0

2.1

2.2

2.3

2.4

-40 -20

0

20

40

60

80

TEMPERATURE (°C)

UVLO vs.

Temperature

0.8

0.9

1.0

1.1

1.2

2

345

6789 10 11

INPUT VOLTAGE (V)

Switching Frequency

vs. Input Voltage

TA = 25°C

0.8

0.9

1.0

1.1

1.2

-40 -20

0

20

40

60

80

TEMPERATURE (°C)

Switching Frequency

vs. Temperature

VIN = 5V

0.190

0.195

0.200

0.205

0.210

2.5 3 3.5 4 4.5 5 5.5 6 6.5

INPUT VOLTAGE (V)

LED Current vs.

Input Voltage (BRT GND)

TCASE = 25°C

RSENSE

0.90

0.91

0.92

0.93

0.94

0.95

0.96

0.97

0.98

0.99

1.00

2.5 3 3.5 4 4.5 5 5.5 6 6.5

INPUT VOLTAGE (V)

LED Current vs.

Input Voltage (BRT Open)

TCASE = 25°C

RSENSE

0

100

200

300

400

500

600

700

800

900

1000

1100

LED Current

vs. DIM Voltage

0

40

80

120 160 200

DIM VOLTAGE (mV)

60

65

70

75

80

85

90

95

2.5 3 3.5 4 4.5 5 5.5 6 6.5

INPUT VOLTAGE (V)

Efficiency vs.

Input Voltage (BRT Open)

RSENSE

60

65

70

75

80

85

90

95

2.5 3 3.5 4 4.5 5 5.5 6 6.5

INPUT VOLTAGE (V)

Efficiency vs.

Input Voltage (BRT GND)

RSENSE

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

0

246

8

10 12 14

OUTPUT VOLTAGE (V)

Max DC LED Current

vs. Output Voltage

VIN = 3.0V

25°C

50°C

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

0

246

8

10 12 14

OUTPUT VOLTAGE (V)

Max DC LED Current

vs. Output Voltage

VIN = 3.6V

25°C

50°C

0

50

100

150

200

250

300

350

400

450

500

0 0.5 1 1.5 2 2.5 3 3.5 4

SWITCH CURRENT (A)

Bipolar Saturation Voltage

vs. Switch Current

TA = 25°C

3.0V

3.6V

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