I want to set LED current to 150mA by external resistance only, not from setting EEPROM register.
Please tell me how to calculate value of RISET.
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I want to set LED current to 150mA by external resistance only, not from setting EEPROM register.
Please tell me how to calculate value of RISET.
Hi Kei,
Kei Sato73562 said:I want to set LED current to 150mA by external resistance only, not from setting EEPROM register.
Please tell me how to calculate value of RISET.
Simplified formula: ILED= (24/RISET)*150, where RISET kOhms. ILED mA
For you case RISET = 24k
EEPROM context:
LED_CURRENT_CTRL[11:0] = 0xFFF (addr 0x60, 0x61) - max current
DRV_LED_CURRENT_SCALE[2:0] = b111 (addr 0x63) - scale 150mA
EN_EXT_LED_CUR_CTRL = 1 (addr 0x66) - external resistor control enabled
Best regards,
Vladimir