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ADP1660 independent mode configuration

Question asked by HL-Cheung on Sep 10, 2015
Latest reply on Sep 21, 2015 by hyao

Dear all,

 

I am trying to use the ADP1660 LED flash driver to driver 2 LEDs at independent mode.  Here is my i2c registers configuration value:

 

register          value

 

0x01              0xBD (<---- mode setting)

0x02              0xFF

0x03              0x88,

0x04              0x18

0x05              0x28

0x06              0x08 (<---- LED1 flash current setting)

0x07              0x00 (<----- LED1 TxMASK current setting)

0x08              0x00

0x09              0x08 (<---- LED2 flash current setting)

0x0A             0x00 (<----- LED2 TxMASK current setting)

0x0B             0x00

0x0F             0x03

 

By using the hardware strobe input pin and GPIO pin, i can turn on/off the LED1 or LED2 respectively(according to the datasheet page 13).
However, i found that when I set "high" to the strobe input, LED1 and LED2 will light up at the same time, with the LED2's intensity is lower. Same situation happen if I apply "high" to GPIO, LED2 and LED1 both light-up, with LED1 is dimmer.

 

So, I would like to know if there is any wrong value in the above setting for independent mode? or there is a configuration sequence in order to get the independent mode?

 

Thank you very much

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