MP3367

– 6-CHANNEL BOOST WLED DRIVER WITH HIGH DIM RATIO AND I2C

MP3367 Rev. 1.0

www.MonolithicPower.com

11

6/17/2019

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TYPICAL PERFORMANCE CHARACTERISTICS (continued)

VIN = 12V, L = 22µH, LED = 6P12S, fSW = 400kHz, ISET = 50mA, TA = 25°C, unless otherwise noted.

PWM Dimming

fPWM = 200Hz, DPWM = 0.01%

PWM Dimming

fPWM = 200Hz, DPWM = 0.001%

CH1: VSW

20V/div.

CH2: VPWM

5V/div.

CH3: IL

200mA/div.

CH4: ILED

200mA/div.

CH1: VSW

20V/div.

CH2: VPWM

5V/div.

CH3: IL

200mA/div.

CH4: ILED

200mA/div.

1µs/div.

1µs/div.

Mix Dimming

fPWM = f(ILED) = 200Hz, DPWM = 10%

Mix Dimming

fPWM = 200Hz, f(ILED) = 23kHz, DPWM = 10%

CH1: VSW

20V/div.

CH2: VPWM

5V/div.

CH3: IL

500mA/div.

CH4: ILED

100mA/div.

CH1: VSW

20V/div.

CH2: VPWM

5V/div.

CH3: IL

500mA/div.

CH4: ILED

100mA/div.

2ms/div.

40µs/div.

Phase Shift Function

fPWM = 200Hz, PWM Dimming, 6-channel

enable

Frequency Spread Spectrum

fPWM = 400Hz, 1/100 of center frequency

CH1: VSW

20V/div.

CH2: VPWM

5V/div.

CH3: ILED1

50mA/div.

CH4: ILED2

50mA/div.

CH1: VSW

20V/div.

CH2: VOUT

20V/div.

CH3: IL

500mA/div.

CH4: ILED

200mA/div.

2ms/div.

2µs/div.