ADD5205 데이터 시트보기 (PDF) - Analog Devices

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ADD5205

Four-String White LED Driver

Analog Devices 

Data Sheet

VOUT (100mV/DIV)

1

VSW (10V/DIV)

2

IL (500mA/DIV)

4

VIN = 18V

A CH2 11.6V

BRIGHTNESS = 100% 6 SERIES x 4 PARALLEL

Figure 10. Switching Waveforms (VIN = 18 V)

VOUT (100mV/DIV)

1

VSW (10V/DIV)

2

IL (500mA/DIV)

4

VIN = 3V

A CH2 11.6V

BRIGHTNESS = 100% 6 SERIES x 4 PARALLEL

Figure 11. Switching Waveforms (VIN = 3 V)

ADD5205

PWM (2V/DIV)

1

VFB1 (1V/DIV)

2

IFB1 (10mA/DIV)

4

VIN = 5V

A CH1 840mV

BRIGHTNESS = 10% 6 SERIES x 4 PARALLEL

Figure 12. LED Current Waveforms (Brightness = 10%)

PWM (2V/DIV)

1

VFB1 (1V/DIV)

2

IFB1 (10mA/DIV)

4

VIN = 5V

A CH1 840mV

BRIGHTNESS = 70% 6 SERIES x 4 PARALLEL

Figure 13. LED FB1 Waveforms (Brightness = 70%)

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