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BQ40Z50-R2: BQ40Z50R2 SOC LED Status Control Pin

March Jasper
Expert 2340 points
Part Number: BQ40Z50-R2

Hi 

Our Customer want to use LED Control  Pin for SOC indicate.

But we have some question for  LED Control Pin Condition .

Could you tell us About this One ??

We want to know about   LEDA  LEDB  LEDC  Pin status .

 * Status men    Pin Level  High ?  /  Low ?  /   Open 

SOC            LEDA     LEDB     LEDC     0~100%    20~100% 40~100% 60~100% 80~100%
                                                                 LED1         LED2        LED3       LED4     LED5
80~100%        ?            ?           ?               ON            ON            ON           ON         ON
60~80%                                                     ON            ON            ON           ON         OFF
40~60%                                                     ON            ON            ON           OFF       OFF
20~40%                                                     ON            ON            OFF         OFF       OFF
0~20%           H？        L？    OPEN？      ON            OFF          OFF          OFF       OFF

Could you tell  us  LEDA / B / C pin condition when each   LED  Bright ?? 

Customer and I can not understanding   these LED External  with LEDA/B/C  control. 

Thanks and Regard

March Jasper       ( Disty   Sugimoto ) 

  • 0
    TI__Mastermind 42535 points

    Hi March,

    The LEDs are operated by a method called charlieplexing. So, effectively the pins are driven at a high duty cycle. Therefore this table will not be applicable because it uses complementary drive so that the eye perceives all LEDs to be lit.