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PT0516

8/27/14

10

PI5USB2549

USB Charging Port Controller and Load Detection Power Switch

Divider-1A, Divider-2A and Divider-2.4A Charging Scheme

There is two charging mode supported by PI5USB2549 with MODE_SEL pin LOW or HIGH. PI5USB2549 supports to flag

Divider-1A/Divider-2A/Divider-2.4A charging scheme as MODE_SEL pin pulls to IN (HIGH), and if MODE_SEL pin pulls to

GND (LOW), the device supports to flag Divider-1A/Divider-2A charging scheme. In Divider-1A charging scheme the device

applies 2.0V and 2.7V to D+ and D- data line respectively. This is reversed in Divider-2A mode. Divider-2.4A charging

scheme on PI5USB2549 is applying 2.7V on both D+ and D-. The Divider-1A, Divider-2A and Divider-2.4A scheme are as

shown below.

Figure 3a, Divider-1A Charging Scheme (with MODE_SEL=“LOW”)

Figure 3b, Divider-2A Charging Scheme (with MODE_SEL=“LOW”)

Figure 3c, Divider-2.4A Charging Scheme (with MODE_SEL=“HIGH”)

GND

USB

Connector

2.7V

1.2V

2.7V

Auto

Detect

D-

D+

PI5USB2549

VBUS

GND

USB

Connector

2.0V

1.2V

2.7V

Auto

Detect

D-

D+

PI5USB2549

VBUS

GND

USB

Connector

2.7V

1.2V

2.0V

Auto

Detect

D-

D+

PI5USB2549

VBUS