LP5569: LP5569 Setting

Eric Hsu34

Prodigy 310 points

Part Number: LP5569

Hi Team

please kindly help me with the question below:

1.Pin 5 EN/PWM： If LED is design with I2C control，could this pin Pull High?

2.Pin 6 CLK： under I2C Control mode， Pull High or Low?

3.Pin 7 GPIO/TRIG/INT：Keep floating?

4.Pin 22 VOUT： What is the function for this pin? How do I handle if this is not used?

over 6 years ago

0 Kenneth Du over 6 years ago

TI__Genius 14295 points

Hi, Eric,

1. EN can be pulled high is PWM is not used.
2. If CLK is not used, it can be connected either Vin or GND.
3. If not used, this PIN is GPIO, so it can be left floating.
4. This is Charge-pump output voltage. If charge pump is used, a 1-μF capacitor must be connected between PGND and this pin. If charge pump is not used or is used in 1× mode only, the capacitor can be omitted.

The above info can be found in datasheet.

0 Andy Lin67 over 6 years ago in reply to Kenneth Du

Prodigy 10 points

Dear Kenneth,

Thanks for answer the question!

Please kindly help me more detail with the question 4

If charge pump is not used and omits the capacitor , should I left this floating or just connect to GND?

Thanks and best regards,

Andy

0 Kenneth Du over 6 years ago in reply to Andy Lin67

TI__Genius 14295 points

Hi, Andy,

You can just leave it floating.

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LP5569: LP5569 Setting