BQ24105-Q1: When VRCH is calculated from the resistance of NiMH Battery Charge

Koji Hayashi92

Part Number: BQ24105-Q1

Hi TI-team

I saw that "Charging NiMH Battery Using bq24105-Q1 in Automotive Applications”

When VOREG is set to 5.1V, R1 is 143kΩ and R2 is 100kΩ.

VRCH is 48.6V when calculated using equation (6) in the data sheet below.

Is this formula correct ?

Best Regards,

Koji Hayashi

0 Jeff F over 5 years ago

Hi Hayashi-san,

The formula is incorrect. The 50mV should be in the numerator not the denominator. For your values, VRCH=0.121V.

Regards,

Jeff

0 Koji Hayashi92 over 5 years ago in reply to Jeff F

Hi Jeff-san

Thank you for quick response.

I understand.

Best Regards,

Koji Hayashi

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