AS3647 datasheet(11/38 Pages) AMSCO

номер детали	AS3647

подробное описание детали	1600mA High Current LED Flash Driver

PDF	38 Pages

Scroll/Zoom	100%

производитель	AMSCO [ams AG]

домашняя страница	http://www.ams.com

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11 / 38 page

www.austriamicrosystems.com/AS3647

1.5-4

10 - 37

AS3647/47B

Datasheet, Confidential - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s

7 Typical Operating Characteristics

VVIN = 3.7V, TA = +25ºC (unless otherwise specified), LED: Osram Phaser 2 (VFLED=3.8V at 1A)

Figure 5. DCDC Efficiency vs. VVIN

Figure 6. Application Efficiency (PLED/PVIN) vs. VVIN

100

2,8

3,2

3,6

4,4

4,8

5,2

Input Voltage (V)

IOUT = 1600mA/1 LED

IOUT = 1300mA/1 LED

IOUT = 1300mA/1 LED/ 1/4MHz on

IOUT = 1000mA/1 LED

2,8

3,2

3,6

4,4

4,8

5,2

Input Voltage (V)

IOUT = 1600mA/1 LED

IOUT = 1300mA/1 LED

IOUT = 1300mA/1 LED/ 1/4MHz on

IOUT = 1000mA/1 LED

Figure 7. Battery Current vs. VVIN

Figure 8. Efficiency at low currents (300mA)

0,5

1,5

2,5

3,5

2,8

3,2

3,6

4,4

4,8

5,2

Input Voltage (V)

IOUT = 1600mA/1 LED

IOUT = 1300mA/1 LED

IOUT = 1300mA/1 LED/ 1/4MHz on

IOUT = 1000mA/1 LED

100

2,8

3,0

3,2

3,4

3,6

3,8

4,0

4,2

4,4

Input Voltage (V)

IOUT = 300mA/1 LEDs

DCDC Efficiency

IOUT = 300mA/1 LEDs

Application Efficiency

Figure 9. ILED Startup (ILED_OUT=1.0A)

Figure 10. IVIN, ILED Startup (ILED_OUT=800mA)

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