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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

Figure 3. DCDC Efficiency vs. VBAT

Figure 4. LED Efficiency vs. VBAT

55

60

65

70

75

80

85

90

95

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

55

60

65

70

75

80

85

90

95

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

55

60

65

70

75

80

85

90

95

025

50

75

E

ff

ic

ie

n

cy

(%

)

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