Datasheet > AS3649

AS3649

更新时间： 2022-02-26 13:33:21

品牌	Logo	应用领域
艾迈斯 - AMSCO		/
页数	文件大小	规格书
39页	3486K
描述
2500mA High Current LED Flash Driver

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AS3649 数据手册

AS3649

Datasheet - Typical Operating Characteristics

7 Typical Operating Characteristics

VVIN = 3.7V, T_A= +25ºC (unless otherwise specified)

Figure 4. DCDC Efficiency vs. VVIN

Figure 5. Application Efficiency (PLED/PVIN) vs. VVIN

100

ILED = 2500mA, VFLED=3.55V (2 LEDs)

ILED = 2000mA, VFLED=3.45V (2 LEDs)

ILED = 1600mA, VFLED=3.7V (1 LED)

ILED = 1600mA / dcdc_skip_enable=0

ILED = 1000mA, VFLED=3.45V (1 LED)

2.8

3.0

3.2

3.4

3.6

3.8

4.0

4.2

4.4

2.8

3.0

3.2

3.4

3.6

3.8

4.0

4.2

4.4

Input Voltage (V)

Figure 6. Battery Current vs. VVIN

Figure 7. Efficiency at low currents (298mA/100mA)

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

limited by 3.7A

peak current setting

ILED = 298mA/1LED DCDC Efficiency

ILED = 2500mA, VFLED=3.55V (2 LEDs)

ILED = 2000mA, VFLED=3.45V (2 LEDs)

ILED = 1600mA, VFLED=3.7V (1 LED)

ILED = 1600mA / dcdc_skip_enable=0

ILED = 1000mA, VFLED=3.45V (1 LED)

ILED = 298mA/1LED Application Efficiency

ILED = 100mA x 2 LEDs DCDC Efficiency

ILED = 100mA x 2 LEDs Application Efficiency

2.8

3.0

3.2

3.4

3.6

3.8

4.0

4.2

4.4

2.8

3.0

3.2

3.4

3.6

3.8

4.0

4.2

4.4

Input Voltage (V)

Figure 8. ILED Startup (ILED_OUT=1.0A)

Figure 9. IVIN, ILED Startup (ILED_OUT=800mA)

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1.0-2

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