AS3490 datasheet(8/19 Pages) AMSCO

Il numero della parte	AS3490

Spiegazioni elettronici	Highly Efficient 2-6 LEDs Backlight Driver with PWM Input

PDF	19 Pages

Scroll/Zoom	100%

Produttore elettronici	AMSCO [ams AG]

Homepage	http://www.ams.com

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8 / 19 page

www.austriamicrosystems.com/AS3490

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AS3490

Datasheet - 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

VBAT = 3.7V, TA = +25ºC (unless otherwise specified).

Figure 3. DCDC Efficiency vs. VBAT

Figure 4. LED Efficiency vs. VBAT

2,5

2,9

3,3

3,7

4,1

4,5

4,9

5,3

Input Voltage (V)

VLED=7.5V, ILEDs=73.5mA

VLED=7.5V, ILEDs=49mA

2,5

2,9

3,3

3,7

4,1

4,5

4,9

5,3

Input Voltage (V)

VLED=7.5V, ILEDs=73.5mA

VLED=7.5V, ILEDs=49mA

Figure 5. Efficiency vs. Load Current

Figure 6. Startup with PWM, 20% duty cycle

025

)

ILED(s) (mA) - combined

LED Efficiency (PLED/PVIN)

DCDC Efficiency (PDCDC/PVIN)

Figure 7. Startup with PWM, 70% duty cycle

Figure 8. DCDC Switching Waveforms

AS3490 Scheda tecnica(PDF) 8 Page - ams AG