TPS61195: Dimming mode

NAOKI AOYAMA

Guru 11215 points

Part Number: TPS61195

Hello,

Our customer use the TPS61195, have two questions.

Q1) The customer using the dimming mode under the following conditions.

PWM interface

Frequency of the dimming : 20kHz

minimum duty : 10%

Which mode should the customer select?

Q2) The pin function of the EN pin

It is mentioned "SDAble and Disable Pin" at the PIN FUNCTION table on the datasheet.

What it means "SDAble" ?

Best Regards,

Naoki Aoyama

over 6 years ago

0 Caryss Li over 6 years ago

TI__Expert 4550 points

Hi Naoki-san,
As for your questions:
1) suggest to use direct PWM mode. which means both SEL1 and SEL2 are connected to GND
2) That is a typo, "SDAble" should be "Enable"

0 NAOKI AOYAMA over 6 years ago in reply to Caryss Li

Guru 11215 points

Hello Caryss-san,

Thank you for your reply.
I see the SDAble is a typo.

I have a question about your suggestion.
According to the Table 4 on the datasheet, it is mentioned the Dmin=20%
at the PWM frequency as from 10kHz to 20kHz.
The customer want to set the Dmin as 10%.
Is it possible to use the Dmin=10% at PWM frequency=20kHz with direct PWM mode?

Best Regards,
Naoki Aoyama

0 NAOKI AOYAMA over 6 years ago in reply to NAOKI AOYAMA

Guru 11215 points

Hello Caryss,

I will post another thread.
I close this post.

Thanks,
Naoki Aoyama

Power management

Power management forum

TPS61195: Dimming mode