PI5USB2544A Datasheet, PDF (26/31 Pages) Pericom Semiconductor Corporation – USB Charging Port Controller and Load Detection Power Switch

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PI5USB2544A, PI5USB2546A
USB Charging Port Controller and Load Detection Power Switch
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Implementing PPM in a System with Two Charging Ports
Below shows the implementation of two charging ports and each port with its own PI5USB2546A. In this example 5V power
supply for the two charging ports is rated at <3A or <15W max. Both devices have RLIM chosen to correspond to the low (0.9A)
and high (1.5A) current limit setting for the port. In this implementation the system can support only one of the two ports at 1.5A
charging current while the other port is set to SDP mode and I_LIMIT corresponding to 0.9A.
5V
EN 1
FAULT 1
S0-S3
100k
PI5USB2546A
IN
OUT
EN
DM_IN
FAULT DP_IN
STATUS
69.8k
(0.6A)
CTL1 ILIM_LO
CTL2
CTL3
ILIM_HI
29.4k (1.5A)
ILIM_SEL GND
USBPort 1
5V
EN 2
FAULT 2
100k
IN
OUT
EN
DM_IN
FAULT DP_IN
STATUS
CTL1 ILIM_LO
CTL2
CTL3
ILIM_HI
ILIM_SEL GND
69.8k
(0.6A)
29.4k (1.5A)
USBPort 2
Figure 10, Implementing Port Power Management in a System Supporting Two Charging Ports
2015-08-0012
PT0513-3 8/31/15
26