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NCP5623 Datasheet(PDF) 9 Page - ON Semiconductor |
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NCP5623 Datasheet(HTML) 9 Page - ON Semiconductor |
9 / 10 page NCP5623 http://onsemi.com 9 Figure 5. Output Current Programmed Value ( ILED = F(Step) ) Step 35 25 20 15 10 5 0 0 15 30 30 10 25 5 20 PWM OPERATION The built−in PWM are fully independent and can be programmed to any value during the normal operation of the NCP5623 chip. The PWM operate with five bits, yielding a 32 steps range to cover the full modulation (0 to 100%) of the associated LED: − PWM = $00 ³ the associated LED is fully OFF, whatever be the programmed ILED value − PWM > $00 but < $1F ³ the brightness of the associated LED is set depending upon the PWM modulation value − PWM = $1F ³ the associated LED is fully ON, the current being the one defined by the ILED value. Each PWM is programmable, via the I2C port as depicted, at any time under any sequence arrangement as requested by the end system’s designer. The PWM does not change the ILED value, but merely modulate the ON/OFF ratio of the associated LED. Each step of the PWM represent 100/31 = 3.225% of the full range, the clock being 2.1 kHz (typical). Figure 6. Basic RGB Application D1 C2 GND C1 GND SDA R1 62 k GND SCL +Vbat +Vcc MCU I2C Port Vdet 12 IREF 10 SDA 9 SCL 11 GND 6 LED3 3 LED2 4 LED1 5 U1 NCP5623 1 mF/6.3 V 1 mF/6.3 V GND Vbat 13 GND 2 IC NC NC IC 17 8 14 +5 V 5 2 6 4 3 1 R G B LRTB−G6T |
Similar Part No. - NCP5623 |
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Similar Description - NCP5623 |
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