COMPANY CONFIDENTIAL
PI5USB1457
USB Charger Controller supporting
SDP, CDP, and DCP per BC1.2 spec
Features
Description
ꢀÎUSB charger controller that supports SDP, DCP and
Notebook PCs are used around the world to charge battery-pow-
ered handheld devices such as cell phones and MP3/MP4 players.
Hand-held devices require communication with the notebook
PC before they start to draw current. is ensures that the hand-
held device will obtain sufficient current when it wants to charge.
e issue is that the notebook PC does not have a way to provide
this acknowledge signal to the handheld device when the note-
book is in “Sleep” mode.
CDP modes
à DCP (Dedicated charger port) is used when
enumeration is not available
à CDP (Charging downstream port) is used when
enumeration is available, but FAST charging is
requested
à SDP (Standard downstream port) is used for systems
that can only support 500mA across Vbus
ꢀÎSingle Power Supply, 5V 10%
Pericom’s PI5USB1457(*/A/B) solves this issue by setting the D+/
D- pins in the notebook PC to the required signal levels during
“sleep” mode. When the handheld device sees these required sig-
nal levels, it will then start to draw the current required to charge
itself.
ꢀÎIntegrated ESD protection up to +/- 4kV contact on pins
2 and 3 per IEC61000-4-2 spec
ꢀÎDetects and differentiates between mouse/keyboard (USB
Low/Full Speed device) when in Sleep and Charge mode
(USB1457 and USB1457A versions only)
Cell phones within today’s market use different communication
schemes, so the switch will need to configure itself in different
modes. PI5USB1457 (*/A/B) can alternate between modes auto-
matically, once device type is correctly detected.
ꢀÎProvides multiple modes of charging to ensure all of the
following spec's can be met:
à USB Battery Charger 1.2 spec
à USB Battery Charger 1.1 spec
D+, D- and Vbus pins are protected with Pericom’s ESD protec-
tion circuits supporting ESD damage as high as +/-4kV contact
per IEC61000-4-2 specification.
à USB Battery Charger 1.0 spec
à YD/T-1591 charger spec
à Certain modes available can also support devices using
non-standard approaches to charging, such
as Apple products and RIM/Blackberry products
ꢀÎPackaging (Pb-free & Green):
à 8-Contact TDFN, ZAE (2.0mm x 2.0mm x 0.75mm)
Block Diagram
INT or INT/
Power Switch
Y-
Y+
References
Control
2
3
4
2
3
1
1
1
1
D+
D-
2
3
2
3
4
Plug/Unplug &
Mode Detection
Control
Logic
Notes:
CTL is only offered on PI5USB1457B version on pin 1.
INT is only offered on PI5USB1457A version on pin 1
INT/ is only offered on PI5USB1457 version on pin 1
SB/ CTL SEL
www.pericom.com
P-0.1
06/27/13
13-0029
1