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PDF PI5USB2549 Data sheet ( Hoja de datos )
| Número de pieza | PI5USB2549 | |
| Descripción | USB Charging Port Controller and Load Detection Power Switch | |
| Fabricantes | Pericom Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PI5USB2549 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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PI5USB2549
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USB Charging Port Controller and Load Detection Power Switch
Features
Supports DCP Modes per USB Battery Charging
Specification 1.2
Supports Shorted Mode per Chinese Telecommunication
Industry Standard YD/T1591-2009
Supports non-BC1.2 Charging Modes by Automatic
Selection
Divider-1A mode
Divider-2A mode
Divider-2.4A mode (with MODE_SEL=’HIGH’ only)
DCP-1.2V mode
Integrated 65-mΩ (Typ.) High-Side MOSFET
Programmable Current Limit up to 3A (Typ.)
Accurate +/-7% Current Limit at 2.51A (Typ.)
Provides /STATUS Pin for Plug-In Detection
Operating Range:4.5V to 5.5V
Device Package: EP-SOP8L
Description
The PI5USB2549 is a USB charging port controller and
current limiting power switch. PI5USB2549 provides the
electrical signatures on D+/D– to support different charging
schemes and is compatible with both popular BC1.2
compliant and non-BC1.2 compliant devices.
The PI5USB2549 65-mΩ power-distribution switch is
intended for applications where heavy capacitive loads and
short-circuits are likely to be encountered. Programmable
current threshold provides flexibility for setting current limit.
PI5USB2549 provides a /STATUS pin for plug-in detect
indication.
Applications
Vehicle USB Power Charger
AC-DC Wall Adapter with USB Port
Other USB Charger
Pin Configuration
Exposed
PAD
EP-SOP8L
Typical Application Diagram
VIN
2k
CIN
PI5USB2549
IN OUT
DM_IN
VBUS
D-
DP_IN
D+
STATUS
GND
GND
High 2.4A
Low 2A
MODE_SEL
COUT
ILIM
18.7k (2.68A)
All trademarks are property of their respective owners 2014-08-0001
1
Peripheral
Device
Charging
www.pericom.com
PT0516 8/27/14
1 page  
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Electrical Characteristics
PI5USB2549
USB Charging Port Controller and Load Detection Power Switch
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4.5V≤VIN≤5.5V; TJ=-40°C to +125°C; R/STATUS=10kΩ RILIM=20kΩ
Positive currents are into pins. Typical values are at 25°C. All voltages are with respect to GND. unless otherwise specified.
Symbol
Description
Test Conditions
Min. Typ. Max. Unit
ILIM Current Limit
IOS OUT Current-limit(2)
tIOS Response time to OUT short circuit(1)
RILIM=210kΩ
RILIM=80.6kΩ
RILIM=22.1kΩ
RILIM=20kΩ
VIN RILIM=16.9kΩ
VIN = 5.0V, R=0.1Ω, lead length=2”
205
575
2120
2340
2770
-
240
625
2275
2510
2970
1.5
275
680
2430
2685
3170
-
mA
s
Supply Current
IIN_ON IN supply current
Undervoltage Lockout
- 215 270 A
VUVLO IN rising UVLO threshold voltage
Hysteresis(1)
- 3.9 4.1 4.3 V
- - 100 - mV
/STATUS
VOL Output low voltage
IOFF Off-state leakage
Thermal Shutdown
I/STATUS = 1mA
V/STATUS = 5.5V
- - 100 mV
- - 1 A
OTSD Thermal shutdown threshold
Hysteresis(1)
- 170 -
°C
- - 20 -
Note:
(1) These parameters are provided for reference only and do not constitute part of Pericom's published device specifications for purposes of Pericom's product
warranty
(2) Pulse-testing techniques maintain junction temperature close to ambient temperature; current limit value tested at 80% output voltage. Thermal effects must be
taken into account separately.
All trademarks are property of their respective owners 2014-08-0001
5
www.pericom.com
PT0516 8/27/14
5 Page 
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DCP-1.2V Charging Scheme
PI5USB2549
USB Charging Port Controller and Load Detection Power Switch
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DCP-1.2V charging scheme is used by some handheld devices to enable fast charging at 2.0A. PI5USB2549 supports this
scheme in the DCP-Auto mode before the device enters BC1.2 shorted mode. To simulate this charging scheme D+/D- lines are
shorted and pulled-up to 1.2V for fixed duration then device moves to DCP shorted mode as defined in BC1.2 spec. This is
shown as Figure 3.
PI5USB2549
2.0V
VBUS
1.2V
Auto
Detect
2.7V
D- USB
Connector
D+
GND
Figure 4, DCP-1.2V Charging Scheme
Output Discharge
To allow a charging port to renegotiate current with a portable device, PI5USB2549 uses the OUT discharge function. It
proceeds by turning off the power switch while discharging OUT, then turning back on the power switch to reassert the OUT
voltage.
Over-Current Protection
When an over-current condition is detected, the device maintains a constant output current and reduces the output voltage
accordingly. Two possible overload conditions can occur. In the first condition, the output has been shorted before the device is
enabled or before VIN has been applied. The PI5USB2549 senses the short and immediately switches into a constant-current
output. In the second condition, a short or an overload occurs while the device is enabled. At the instant the overload occurs,
high currents may flow for nominally one to two microseconds before the current-limit circuit can react. The device operates in
constant-current mode after the current-limit circuit has responded. Complete shutdown occurs only if the fault is presented
long enough to activate thermal limiting. The device will remain off until the junction temperature cools approximately 20°C
and will then re-start. The device will continue to cycle on/off until the over-current condition is removed.
All trademarks are property of their respective owners 2014-08-0001
11
www.pericom.com
PT0516 8/27/14
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet PI5USB2549.PDF ] | |
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