Part Number: BQ24707
HI,
Customer have problem with circuit BQ24707RGRT, exactly with ACOK output. This pin is still in high state during the operation, please see details below.
"Datasheet text:
/ACOK
AC adapter detect open-drain output. The output is pulled LOW to GND by an internal MOSFET when the voltage on the ACDET pin is above 2.4 V, voltage on the VCC pin is above UVLO and voltage on the VCC pin is 245 mV above ACOK 5 the voltage on the SRN pin, indicating a valid adapter is present to start charge. If any one of the above conditions cannot meet, it is pulled HIGH to the external pullup supply rail by an external pullup resistor. Connect a 10-kΩ pullup resistor from the ACOK pin to the pullup supply rail.
My measured conditions: ACDET = 2,88V, VCC = 19,8V, REGN = 6V, Voltage SRN to GND is about 400mV (BATTERY is not connected).
Fault pin is not connected, but it isn´t in low state (measured --> open-loop between this pin and GND), so
it´s look ok.
Have you please a some tips, why ACOK still not goes to low? Is some condition, which is not written in datasheet, which must be set too?
Internal schematics are not in datasheet.
"
Thank you in advance.
Regards,
Maynard
