AW3643CSR datasheet(14/39 Pages) AWINIC

14 / 39 page

AW3643

Jan 2018 V1.4

www.awinic.com.cn

Typical Characteristics (continued)

Ambient temperature is 25°C, input voltage is 3.6 V, HWEN = IN, CIN = COUT = 2×10 µF and L=1 µH, unless

otherwise noted .

ILED (500mA/DIV)

IIN (1A/DIV)

VOUT (2V/DIV)

TIME (500 μs/DIV)

ILED1/2=1006mA

fSW=2Mhz

VLED=3.4V

Fig 39. Ramp Up

VOUT (2V/DIV)

ILED (500mA/DIV)

IIN (1A/DIV)

TIME (500 μs/DIV)

ILED1/2=1006mA

fSW=2Mhz

VLED=3.4V

Fig 40. Ramp Down

1.60

1.64

1.68

1.72

1.76

1.80

1.84

1.88

1.92

1.96

2.00

2.04

2.08

2.12

2.16

2.20

2.5

2.7

2.9

3.1

3.3

3.5

3.7

3.9

4.1

4.3

VIN (V)

ILED=1.5A

fSW=2MHz

VLED=4.5V

ICL=1.9A

Fig 35. Inductor Current Limit vs Input Voltage

1.60

1.64

1.68

1.72

1.76

1.80

1.84

1.88

1.92

1.96

2.00

2.04

2.08

2.12

2.16

2.20

2.5

2.7

2.9

3.1

3.3

3.5

3.7

3.9

4.1

4.3

VIN (V)

ILED=1.5A

fSW=4MHz

VLED=4.5V

ICL=1.9A

Fig 36. Inductor Current Limit vs Input Voltage

1.4

1.6

1.8

2.0

2.2

2.4

2.6

2.8

3.0

2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9

VIN (V)

ILED=1.5A

fSW=2MHz

VLED=4.5V

ICL=2.8A

Fig 37. Inductor Current Limit vs Input Voltage

1.4

1.6

1.8

2.0

2.2

2.4

2.6

2.8

3.0

2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9

VIN (V)

ILED=1.5A

fSW=4MHz

VLED=4.5V

ICL=2.8A

Fig 38. Inductor Current Limit vs Input Voltage

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