
NCP5890
SCL
SDA
I2C Port
BOOST CONVERTER
PWM0
PWM1
PWM2
GRDIMT
PWM0 Drive
PWM1 Drive
PWM2 Drive
I ? LED min
I ? LED max
3 bits
5 bits
DIGITAL COMPARATOR
Low I ? LED
DIGITAL COMPARATOR
High I ? LED
PHGAIN
5 bits
5 bits
I ? LED
Log
4
Low Pass
Filter
ANALOG
MONITORING
DIGITAL
COUNTER
& PROCESSING
1
GND
I ? LED CONTROL
1
2
Photo Sense
PHTIM
1.3MHz oscillator
1 kHz oscillator
Figure 3. Basic NCP5890 Structure
http://onsemi.com
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