IP5328P

V1.2

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Copyright © 2015, Injoinic Corp.

Layout from 10mOhm sample resistor to input/output MOSFET

Application example: non-fast charge phone is attached VOUT1, fast charge phone is attached on VOUT2, this

is multiple output ports case, IP5328P will output 5V for both phones. When VOUT1 is plug out or power

consumption is lower than the preset value, IP5328P will disable VOUT1 output and maintain VOUT2 output, fast

charge output will be re-activated and supplied on VOUT2.

To realize the self-recovery of fast charge, output current on VOUT1 port should be detected accurately. This

current is detected by measuring the voltage drop between VSN and VOUT1 pin, the precondition of closing the

VOUT1 port is voltage drop lower than 1.8mV. So no other current tack is allowed to flow through VSN and VOUT1,

or false current will form voltage drop and lead to erroneous judgment on current. Similarly, pay special attention

on the other output ports.

Above all, lay separately on 10mOhm to VOUT1, 10mOhm to VOUT2 and 10mOhm to VIN on PCB

independently, any two current tracks should not overlay, if not, self-recovery of fast charge function in the

application example above may fail now and then.

The layout example is demonstrated below:

If improper layout lead to 1mOhm overlayed track on VOUT1 and VOUT2 output current, 2A current on

VOUT2 output will bring in 2mV voltage drop on the 1mOhm overlayed track. In this case, IP5328P cannot judge if

VOUT1 still has device attached even though device is plug out, thus lead to a failure on recovery of fast charge

function on VOUT2. Only when the output current on VOUT2 port is lower than 1.8A, and the corresponding

voltage drop on 1mOhm overlayed track is lower than 1.8V, can VOUT2 fast charge function be re-activated.