Hello there,
I would like to use the MAX1811 for charging a Li-ion battery. The chip has some inputs for controlling its behaviour, for example selecting either a 100mA or 500mA charging current (called the "SELI" pin). The datasheet says:
Drive SELI low to set the charge current to the 100mA
mode. Use a 10kΩ pulldown resistor to ground on SELI,
if necessary, to ensure that the MAX1811 defaults to
the 100mA mode in the event that no logic signal is
present. Drive SELI high to increase the charge current
to the 500mA mode only if the polled USB port can provide
the required current.
My question is, if I always want one mode or the other, can I just tie the SELI input either directly to ground or directly to the positive supply rail, depending on which mode I want? Or is a pulldown/pullup resistor a requirement?
Thanks in advance!
I would like to use the MAX1811 for charging a Li-ion battery. The chip has some inputs for controlling its behaviour, for example selecting either a 100mA or 500mA charging current (called the "SELI" pin). The datasheet says:
Drive SELI low to set the charge current to the 100mA
mode. Use a 10kΩ pulldown resistor to ground on SELI,
if necessary, to ensure that the MAX1811 defaults to
the 100mA mode in the event that no logic signal is
present. Drive SELI high to increase the charge current
to the 500mA mode only if the polled USB port can provide
the required current.
My question is, if I always want one mode or the other, can I just tie the SELI input either directly to ground or directly to the positive supply rail, depending on which mode I want? Or is a pulldown/pullup resistor a requirement?
Thanks in advance!