PI5USB2544
USB Charging Port Controller and Detection Power Switch
Description
Features
Applications
Pin Configuration (TQFN-16, ZH)
PI5USB2544
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
1
September 2017
© Diodes Incorporated
PI5USB2544
Pin Description
Pin #
Name
Type
Description
1
IN
P
Input voltage and supply voltage; connect 0.1μF or greater ceramic capacitor from IN
to GND as close to the device as possible
2
DM_OUT
I/O
D- Data line to USB host controller.
3
DP_OUT
I/O
D+ data line to USB host controller.
4
ILIM_SEL
I
Logic-level input signal used to control the charging mode, current limit threshold,
and load detection, see the control truth table. Can be tied directly to IN or GND
without pull-up or pull-down resistor.
5
EN
I
Logic-level input for turning the power switch and the signal switches on/off, logic
low turns off the signal and power switches and holds OUT in discharger. Can be tied
directly to IN or GND without pull-up or pull-down resistor.
6
CTL1
I
7
CTL2
I
8
CTL3
I
9
NC
--
10
DP_IN
I/O
D+ data line to downstream connector
11
DM_IN
I/O
D- data line to downstream connector.
12
OUT
P
Power-switch output
13
FAULT
O
Active-low open-drain output, asserted when over-temperature or current limit
conditions
14
GND
G
Ground connection
15
ILIM_LO
I
External resistor connection used to set the low current-limit threshold and the load
detection current threshold. A resistor to ILIM_LO is optional; see Current-Limit
Settings.
16
ILIM_HI
I
External resistor connection used to set the high current-limit threshold.
NA
Exposed PAD
G
Internally connected to GND. Thermal pad to heat-sink the part to the circuit board.
Logic-level inputs used to control the charging mode and signal switches; see the
control truth table. Can be tied directly to IN or GND without pull-up or pull-down
resistor.
Connect to GND or leave open.
* I = Input; O = Output; P = Power; G = Ground
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
2
September 2017
© Diodes Incorporated
PI5USB2544
Maximum Ratings
All Input (except IN to OUT, and DP_IN, DM_IN, DP_OUT, DM_OUT) ..........-0.3V to +6.0V
IN to OUT .................................................................................................................................-6.0V to +6.0V
DP_IN, DM_IN, DP_OUT, DM_OUT ...................................................... -0.3V to IN+0.3 or +5.7V
Input clamp current (DP_IN, DM_IN, DP_OUT, DM_OUT) ............................................... ±20mA
Continuous current in SDP or CDP mode
(DP_IN to DP_OUT or DM_IN to DM_OUT)........................................................................±100mA
Continuous current in BC1.2 DCP mode (DP_IN to DM_IN) ................................................ ±50mA
Continuous output current (OUT).....................................................................................Internally limited
Continuous output sink current (/FAULT) ........................................................................................25mA
Continuous output source current (ILIM_LO, ILIM_HI) ..........................................internally limited
ESD: HBM Mode (All pins) ...................................................................................................................2kV
CDM Mode (All pins) ................................................................................................................ 500V
HBM (USB connector pins: DP_IN, DM_IN, OUT to GND)............................................6kV
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the device.
This is a stress rating only and functional operation of the
device at these or any other conditions above those
indicated in the operational sections of this specification
is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
Recommended Operating Conditions
Symbol
Parameter
Min.
Typ.
Max.
Unit
4.5
-
5.5
V
Input Voltage, logic-level EN, CTL1, CTL2, CTL3, ILIM_SEL inputs
0
-
5.5
V
Input Voltage, data line inputs, DP_IN, DM_IN, DP_OUT, DM_OUT
0
-
VIN
V
Input Voltage, IN
VIN
VIH
High-level input voltage, EN, CTL1, CTL2, CTL3, ILIM_SEL
1.8
-
-
V
VIL
Low-level input voltage, EN, CTL1, CTL2, CTL3, ILIM_SEL
-
-
0.8
V
Continuous current data line inputs, SDP or CDP mode, DP_IN to DP_OUT or
DM_IN to DM_OUT
-
-
±30
mA
Continuous current data line inputs, BC1.2 DCP mode, DP_IN to DM_IN
-
-
±15
mA
Continuous output current, OUT
0
-
2.5
A
Continuous output sink current, /FAULT
0
-
10
mA
Current-limit set resistor
16.9
-
750
kΩ
TA
Ambient Temperature Range
-40
-
85
ºC
TJ
Operating Virtual Junction Temperature Range
-40
-
125
ºC
IOUT
RILIM_XX
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
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September 2017
© Diodes Incorporated
PI5USB2544
Electrical Characteristics
4.5V≤VIN≤5.5V, TJ=-40°C to +125°C, VEN =VIN, VILIM_SEL=VIN, VCTL1= VCTL2= VCTL3=VIN, R/FAULT=10kΩ, RILIM_HI=20kΩ, RILIM_LO=80.6kΩ,
Positive currents are into pins. Typical values are at 25°C. All voltages are with respect to GND. unless otherwise specified.
Symbol
Parameter
Test Conditions
Min
Typ.
Max
TJ = 25oC, IOUT = 2A
73
84
-40oC ≤ TJ ≤ 85oC, IOUT = 2A
73
105
-40oC ≤ TJ ≤ 125oC, IOUT = 2A
73
120
0.7
1.0
1.60
0.2
0.35
0.5
2.7
4
1.7
3
Unit
Power Switch
RDS(on)
On Resistance(1)
tr
OUT voltage rise time
tf
OUT voltage fall time
ton
OUT voltage turn-on time
toff
OUT voltage turn-off time
VIN = 5V, CL = 1μF, RL = 100Ω
ms
VIN = 5V, CL = 1μF, RL = 100Ω
ms
Reverse leakage current
VOUT = 5.5V, VIN = VEN = 0V,
-40oC ≤ TJ ≤ 85oC, Measure IOUT
RDCHG
OUT discharge resistance
VOUT = 4V, VEN = 0V
400
tDCHG
OUT discharge hold time
Time VOUT< 0.7V
IREV
mΩ
2
μA
500
630
Ω
1.30
2.0
2.9
s
-
1
1.35
1.70
V
-
0.85
1.15
1.45
V
-
-
200
-
mV
-0.5
-
0.5
µA
Discharge
EN, ILIM_SEL, CTL1,CTL2, CTL3, inputs
Input pin rising logic threshold
voltage
Input pin falling logic
threshold voltage
Hysteresis(2)
Input current
(1)
(2)
Pin voltage= 0V to 5.5V
Pulse-testing techniques maintain junction temperature close to ambient temperature; Thermal effects must be taken into account separately
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
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
4
September 2017
© Diodes Incorporated
PI5USB2544
Electrical Characteristics
4.5V≤VIN≤5.5V, TJ=-40°C to +125°C, VEN =VIN, VILIM_SEL=VIN, VCTL1= VCTL2= VCTL3=VIN, R/FAULT= 10kΩ, RILIM_HI=20kΩ, RILIM_LO=80.6kΩ,
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
205
575
2120
2340
2770
240
625
2275
2510
2970
275
680
2430
2685
3170
mA
-
1.5
-
s
VEN=0V, VOUT=0V, TJ =-40°C to +125°C
-
0.1
2
VCTL1=VCTL2= VIN, VCTL3= 0V VILIM_SEL = 0V
-
165
220
VCTL1 = VCTL2 = VCTL3 = VIN, VILIM_SEL = 0V
-
175
230
VCTL1 = VCTL2 = VIN, VCTL3 = 0V, VILIM_SEL = VIN
-
185
240
VCTL1 = VCTL2 = VCTL3 = VIN, VILIM_SEL = VIN
-
195
250
VCTL1 = 0V, VCTL2 = VCTL3 = VIN, VILIM_SEL = 0V
-
215
270
VCTL1 = 0V, VCTL2 = VCTL3 = VIN, VILIM_SEL = VIN
-
240
290
-
3.9
4.1
4.3
V
-
-
100
-
mV
ILIM_SEL Current Limit
IOS
OUT Current-limit(2)
VILIM_SEL= 0 V RILIM_LO=210kΩ
VILIM_SEL= 0 V RILIM_LO=80.6kΩ
VILIM_SEL= 0 V RILIM_LO=22.1kΩ
VILIM_SEL= VIN RILIM_HI=20kΩ
VILIM_SEL= VIN RILIM_HI=16.9kΩ
tIOS
Response time to OUT short circuit(1)
VIN = 5.0V, R=0.1Ω, lead length=2”
Supply Current
IIN_OFF
IIN_ON
Disabled IN supply current
Enable IN supply current
A
Undervoltage Lockout
VUVLO
IN rising UVLO threshold voltage
(1)
Hysteresis
/FAULT
VOL
Output low voltage
I/FAULT = 1mA
-
-
100
mV
IOFF
Off-state leakage current
V/FAULT = 5.5V
-
-
1
A
TD
Over current /FAULT rising and falling deglitch
5
8.2
12
ms
170
-
20
-
-
Thermal Shutdown
OTSD
Thermal shutdown threshold
-
(1)
Hysteresis
-
-
°C
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.
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
5
September 2017
© Diodes Incorporated
PI5USB2544
Electrical Characteristics, High-bandwidth Switch
4.5V≤VIN≤5.5V, TJ=-40°C to +125°C, VEN =VIN, VILIM_SEL=VIN, VCTL1= VCTL2= VCTL3=VIN, R/FAULT= 10kΩ, RILIM_HI=20kΩ, RILIM_LO=80.6kΩ,
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
VDP/DM_OUT= 0V, IDP/DM_IN= 30mA
-
2
4
Ω
VDP/DM_OUT= 2.4V, IDP/DM_IN= -15mA
-
3
6
Ω
VDP/DM_OUT= 0V, IDP/DM_IN= 30mA
-
0.05
0.15
Ω
VDP/DM_OUT= 2.4V, IDP/DM_IN= -15mA
VEN=0V, VDP/DM_IN= 0.3V,
Vac= 0.6VPK-PK, f=1MHz
-
0.05
0.15
Ω
-
4.5
-
pF
VDP/DM_IN= 0.3V,Vac= 0.6VPK-PK, f = 1MHz
-
5.4
6.2
pF
VEN = 0V, f = 250MHz
-
33
-
dB
f = 250MHz
VEN = 0V, VDP/DM_IN = 3.6V, VDP/DM_OUT =
0V, measure IDP/DM_OUT
RL =50Ω
-
52
-
dB
-
0.1
1.5
A
-
2.0
-
GHz
-
-
0.25
-
ns
-
-
0.1
0.2
ns
HIGH_BANDWIDTH ANALOG SWITCH
DP/DM switch on resistance
Switch resistance mismatch
between DP/DM channels
OIRR
XTALK
DP/DM switch off-state
capacitance(1)
DP/DM switch on-state
capacitance(2)
Off-state isolation(3)
Off-state cross channel isolation
IOFF
Off-state leakage current
BW
Bandwidth(-3dB)(3)
tpd
tSK
(3)
(3)
Propagation delay
Skew between opposite transitions
of the same port(tPHL – tPLH)
Note:
(1) The resistance in series with the parasitic capacitance to GND is typically 250 Ω.
(2) The resistance in series with the parasitic capacitance to GND is typically 150 Ω.
(3) 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.
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
6
September 2017
© Diodes Incorporated
PI5USB2544
Electrical Characteristics, Charging Controller
4.5V≤VIN≤5.5V; TJ=-40°C to +125°C; VEN =VIN, VILIM_SEL=VIN, VCTL1= VCTL2= VCTL3=VIN, R/FAULT=10kΩ, RILIM_HI=20kΩ, RILIM_LO=80.6kΩ,
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
-
125
200
Ω
1.19
1.25
1.31
V
60
75
94
kΩ
1.9
2.0
2.1
V
2.57
2.7
2.84
V
7.5
10.5
16
kΩ
2.57
2.7
2.84
V
1.9
2.0
2.1
V
7.5
10.5
16
kΩ
0.5
0.6
0.7
V
0.25
-
0.4
V
-
50
-
mV
0.8
-
1.5
V
-
100
-
mV
550
650
765
mA
-
50
-
mA
Load detect set time
140
200
275
ms
Load detect reset time
1.9
3
4.2
s
SHORTED MODE (BC1.2 DCP)
DP_IN/DM_IN shorting resistance
VCTL1= VIN; VCTL2= VCTL3= 0V
DCP-1.2V MODE
DP_IN/DM_IN output voltage
DP_IN/DM_IN output impedance
VCTL1= 0V; VCTL2= VCTL3= VIN,
Apply 3V on DP_IN for 0.5s and
measure the D+/D- voltage within the 2s
DIVIDER-1A MODE
DP_IN Divider-1A output voltage
DM_IN Divider-1A output voltage
VCTL1= 0V; VCTL2= VCTL3= VIN,
DP_IN/DM_IN output impedance
DIVIDER-2A MODE
DP_IN Divider-2A output voltage
DM_IN Divider-2A output voltage
VCTL1= 0V; VCTL2= VCTL3= VIN;
IOUT= 1A
DP_IN/DM_IN output impedance
CHARGING DOWNSTREAM PORT
VDM_SRC
VDAT_REF
VLGC_REF
DP_IN CDP output voltage
DP_IN rising lower window
threshold for VDM_SRC activation
Hysteresis(1)
DP_IN rising upper window
threshold for VDM_SRC de-activation
Hysteresis(1)
LOAD DETECT- NON POWER WAKE
IOUT rising load detect current
threshold
ILD
Hysteresis(1)
tLD_SET
VCTL1= VCTL2= VCTL3= VIN, VIN =0.6V,
-250μA ≤ IDM_IN ≤ 0μA
VCTL1= VCTL2= VCTL3= VIN
VCTL1= VCTL2= VCTL3= VIN
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.
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
7
September 2017
© Diodes Incorporated
PI5USB2544
Electrical Characteristics, Charging Controller
4.5V≤VIN≤5.5V; TJ=-40°C to +125°C; VEN =VIN, VILIM_SEL=VIN, VCTL1= VCTL2= VCTL3=VIN, R/FAULT=R/STATUS=10kΩ RILIM_HI=20kΩ,
RILIM_LO=80.6kΩ, Positive currents are into pins. Typical values are at 25°C. All voltages are with respect to GND. unless otherwise specified.
Symbol
Description
LOAD DETECT- POWER WAKE
Power wake short circuit current
IOS_PW
limit
IOUT falling power wake reset
current threshold
Reset current hysteresis(1)
Test Conditions
VCTL1= VCTL2= 0V, VCTL3= VIN
Power wake reset time
Min.
Typ.
Max.
Unit
20
55
90
mA
10
45
85
mA
-
5
-
mA
10.7
15
20.6
s
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.
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
8
September 2017
© Diodes Incorporated
PI5USB2544
Functional Description
PI5USB2544 Block Diagram
IN
ILIM_HI
ILIM_LO
OUT
Current
Limit
Select
Disable+UVLO+
Discharger
Current
Limit
Charger
Pump
OC
UVLO
ILIM_SEL
8msDeglitch
GND
OTSD
Thermal
Sense
Driver
FAULT
Discharge
EN
8ms-Deglitch
(Falling edge)
DM_OUT
DM_IN
DP_OUT
DP_IN
OC
CTL1
CTL2
Logic
Control
CDP
Detection
DCP
Detection
Divider
Modes
Auto
Detection
Discharge
CTL3
Discharge
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
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September 2017
© Diodes Incorporated
PI5USB2544
Details Description
The following overview references various industry standards. It is always recommended to consult the most up-to-date
standard to ensure the most recent and accurate information. Rechargeable portable equipment requires an external power
source to charge its batteries. USB ports are a convenient location for charging because of an available 5V power source.
Universally accepted standards are required to make sure host and client-side devices operate together in a system to ensure
power management requirements are met. Traditionally, host ports following the USB 2.0 specification must provide at least
500mA to downstream client-side devices. Because multiple USB devices can be attached to a single USB port through a
bus-powered hub, it is the responsibility of the client-side device to negotiate its power allotment from the host to ensure the
total current draw does not exceed 500mA. In general, each USB device is granted 100mA and may request more current in
100mA unit steps up to 500mA. The host may grant or deny based on the available current. A USB 3.0 host port not only
provides higher data rate than USB 2.0 port but also raises the unit load from 100mA to 150mA. It is also required to provide a
minimum current of 900mA to downstream client-side devices.
Additionally, the success of USB has made the mini-USB connector a popular choice for wall adapter cables. This allows a
portable device to charge from both a wall adapter and USB port with only one connector. As USB charging has gained
popularity, the 500mA minimum defined by USB 2.0 or 900mA for USB 3.0 has become insufficient for many handset and
personal media players which need a higher charging rate. Wall adapters can provide much more current than 500mA/900mA.
Several new standards have been introduced defining protocol handshaking methods that allow host and client devices to
acknowledge and draw additional current beyond the 500mA/900mA minimum defined by USB 2.0/3.0 while still using a
single micro-USB input connector. The PI5USB2544 supports four of the most common USB charging schemes found in
popular hand-held media and cellular devices:
USB Battery Charging Specification BC1.2
Chinese Telecommunications Industry Standard YD/T 1591-2009
Divider-1A and Divider-2A
DCP-1.2V Mode
YD/T 1591-2009 is a subset of BC1.2 spec. supported by vast majority of devices that implement USB charging.
Divider-1A, Divider-2A and DCP-1.2V charging schemes are supported in devices from specific yet popular device makers.
BC1.2 lists three different port types as listed below:
Standard Downstream Port (SDP)
Charging Downstream Port (CDP)
Dedicated Charging Port (DCP)
BC1.2 defines a charging port as a downstream facing USB port that provides power for charging portable equipment, under
this definition CDP and DCP are defined as charging ports
Table 1 shows the differences between these ports.
Table 1. Operation Modes
Port Type
Support USB 2.0 Communication
SDP (USB 2.0)
SDP (USB 3.0)
CDP
DCP
Yes
Yes
Yes
No
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
10
Max. allowable current draw by
portable device
0.5A
0.9A
1.5A
1.5A
September 2017
© Diodes Incorporated
PI5USB2544
Standard Downstream Port (SDP) USB 2.0/USB 3.0
An SDP is a traditional USB port that follows USB 2.0/3.0 protocol and supplies a minimum of 500mA/900mA per port. USB
2.0/3.0 communications is supported, and the host controller must be active to allow charging. PI5USB2544 supports SDP
mode in system power state S0 when system is completely powered ON and fully operational. For more details on control pin
(CTL1, CTL2, CTL3 and ILIM_SEL) settings to program this state please refer to device truth table.
Charging Downstream Port (CDP)
A CDP is a USB port that follows USB BC1.2 and supplies a minimum of 1.5A per port. It provides power and meets USB 2.0
requirements for device enumeration. USB 2.0 communications is supported and the host controller must be active to allow
charging. What separates a CDP from an SDP is the host-charge handshaking logic that identifies this port as a CDP. A CDP is
identifiable by a compliant BC1.2 client device and allows for additional current draw by the client device.
The CDP hand-shaking process is done in two steps. During step one the portable equipment outputs a nominal 0.6V output on
its D+ line and reads the voltage input on its D- line. The portable device concludes it is connected to an SDP if the voltage is
less than the nominal data detect voltage of 0.3V. The portable device concludes that it is connected to a Charging Port if the
D- voltage is greater than the nominal data detect voltage of 0.3V and optionally less than 0.8V.
The second step is necessary for portable equipment to determine if it is connected to CDP or DCP. The portable device outputs
a nominal 0.6V output on its D- line and reads the voltage input on its D+ line. The portable device concludes it is connected to
a CDP if the data line being read remains less than the nominal data detect voltage of 0.3V. The portable device concludes it is
connected to a DCP if the data line being read is greater than the nominal data detect voltage of 0.3V.
PI5USB2544 supports CDP mode in system power state S0 when system is completely powered ON and fully operational.
For more details on control pin (CTL1, CTL2, CTL3 and ILIM_SEL) settings to program this state please refer to device truth
table.
Dedicated Charging Port (DCP)
A DCP only provides power but does not support data connection to an upstream port. As shown in following sections, a DCP
is identified by the electrical characteristics of its data lines. The PI5USB2544 emulates DCP in two charging states, namely
DCP Forced and DCP Auto as shown in Figure 4. In DCP Forced state the device will support one of the two DCP charging
schemes, namely Divider-1A or DCP_Shorted. In the DCP Auto state, the device charge detection state machine is activated to
selectively implement charging schemes involved with the Shorted DCP mode, Divider-1A, Divider-2A and DCP-1.2V modes.
Shorted DCP mode complies with BC1.2 and Chinese Telecommunications Industry Standard YD/T 1591-2009, while the
Divider-1A, Divider-2A and DCP-1.2V modes are employed to charge devices that do not comply with BC1.2 DCP standard.
DCP BC1.2 and YD/T 1591-2009
Both standards define that the D+ and D- data lines should be shorted together with a maximum series impedance of 200 Ω.
This is shown as Figure 1.
VBUS
PI5USB2544
2.0V
D- OUT
200Ω
USB
Host/Hub
CDP
Detect
Auto
Detect
D-
USB
Connector
1.2V
D+OUT
2.7V
D+
GND
Figure 1, DCP mode
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
11
September 2017
© Diodes Incorporated
PI5USB2544
Divider-1A and Divider-2A Charging Scheme
There are two charging schemes supported by PI5USB2544, Divider-1A and Divider-2A as shown below. 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.
VBUS
PI5USB2544
2.7V
D- OUT
USB
Host/Hub
CDP
Detect
Auto
Detect
D-
USB
Connector
1.2V
D+OUT
2.0V
D+
GND
Figure 2a, Divider-1A Charging Scheme
VBUS
PI5USB2544
2.0V
D- OUT
USB
Host/Hub
CDP
Detect
Auto
Detect
D-
USB
Connector
1.2V
D+OUT
2.7V
D+
GND
Figure 2b, Divider-2A Charging Scheme
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
12
September 2017
© Diodes Incorporated
PI5USB2544
DCP-1.2V Charging Scheme
DCP-1.2V charging scheme is used by some handheld devices to enable fast charging at 2.0A. PI5USB2544 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.
VBUS
PI5USB2544
2.0V
D- OUT
USB
Host/Hub
CDP
Detect
D-
Auto
Detect
USB
Connector
1.2V
D+OUT
D+
2.7V
GND
Figure 3, DCP-1.2V Charging Scheme
DCP Auto Mode
As mentioned above the PI5USB2544 integrates an auto-detect state machine that supports all the above DCP charging
schemes. It starts in Divider-1A scheme, however if a BC1.2 or YD/T 1591-2009 compliant device is attached, the
PI5USB2544 responds by discharging OUT, turning back on the power switch and operating in 1.2Vmode briefly and then
moving to BC1.2 DCP mode. It then stays in that mode until the device releases the data line, in which case it goes back to
Divider-1A scheme. When a Divider-1A compliant device is attached the PI5USB2544 will stay in Divider-1A state.
Also, the PI5USB2544 will automatically switch between the Divider-1A and Divider-2A schemes based on charging current
drawn by the connected device. Initially the device will set the data lines to Divider-1A scheme. If charging current of the
device >750mA is measured by the PI5USB2544, it switches to Divider-2A scheme and test to see if the peripheral device will
still charge at a high current. If it does then it stays in Divider-2A charging scheme otherwise it will revert to Divider-1A
scheme.
PI5USB2544
To USB
2.0 Host
BC1.2 CDP
Controlled by
CTL pins settings
DCP Auto
DBC1.2 DCP
/DCP-1.2V
D+
Divider-1A/
Divider-2A
Figure 4, DCP_Auto Mode
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
13
September 2017
© Diodes Incorporated
PI5USB2544
DCP Forced Shorted / DCP Forced Divider-1A
In this mode the device is permanently set to one of the DCP schemes (BC1.2/ YD/T 1591-2009 or Divider-1A) as commanded
by its control pin setting per device truth table.
High-Bandwidth Data Line Switch
The PI5USB2544 passes the D+ and D- data lines through the device to enable monitoring and handshaking while supporting
charging operation. A wide bandwidth signal switch is used, allowing data to pass through the device without corrupting signal
integrity. The data line switches are turned on in any of CDP or SDP operating modes.
The EN input also needs to be at logic High for the data line switches to be enabled.
NOTE:
1.
2.
3.
4.
Under CDP mode, the data switches are ON even while CDP handshaking is occurring.
The data line switches are OFF if EN or all CTL pins are held low, or if in DCP mode. They are not automatically
turned off if the power switch (IN to OUT) is in current limit.
The data switches are for USB 2.0 differential pair only. In the case of a USB 3.0 host, the super speed differential
pairs must be routed directly to the USB connector without passing through the PI5USB2544.
Data switches are OFF during OUT (VBUS) discharge
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
14
September 2017
© Diodes Incorporated
PI5USB2544
Device Operation
Please refer to the simplified device state diagram below. Power-on-reset (POR) holds device in initial state while output is held
in discharge mode. Any POR event will take the device back to initial state. After POR clears, device goes to the next state
depending on the CTL1, CTL2, CTL3 and ILIM_SEL lines as shown Figure 5.
DCP_Auto
Reset
DCP_Shorted
Divider-1A
Sample
CTL Pins
DCP Forced (DCP
Shorted or Divider-1A)
DCH/SDP/CDP
CDP
(1111)
DCH
DCH
Done
DCP_Auto
DCP_Shorted
/Divider-1A
DCH/SDP/CDP
SDP1
(111x/
010x)
Discharge
SDP2
(1110)
DCP Auto (DCP Shorted
/DCP-1.2V
/ Divider-1A/2A)
Not SDP1
Not SDP2
or CDP
SDP1
CDP
CDP
(1111)
SDP2
(1110)
SDP2
Note:
1) All shaded boxed are device charging modes.
2) See below table for CTL settings corresponding to flow
line conditions
Device Control Pins
Flow Line Condition CTL1 CTL2 CTL3 ILIM_SEL
DCH(Discharge)
0
0
0
x
CDP
1
1
1
1
SDP2(No Discharge
1
1
1
0
from/to CDP)
SDP1(Discharge
1
1
0
x
from/to any charging
0
1
0
x
state including CDP)
DCP_Short
1
0
0
x
DCP/Divider-1A
1
0
1
x
0
1
1
x
DCP_Auto
0
0
1
x
Figure 5, PI5USB2544 Charging States
Output Discharge
To allow a charging port to renegotiate current with a portable device, PI5USB2544 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. This discharge function is automatically applied as shown in device state diagram.
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
15
September 2017
© Diodes Incorporated
PI5USB2544
Wake on USB Feature (Mouse/Keyboard Wake Feature)
USB 2.0 Background Information
The PI5USB2544 data lines interface with USB 2.0 devices. USB 2.0 defines three types of devices according to data rate.
These devices and their characteristics relevant to PI5USB2544 Wake on USB operation are shown below:
Low-speed USB devices
1.5 Mb/s
Wired mice and keyboards are examples
No devices that need battery charging
All signaling performed at 2.0V and 0.8V hi/lo logic levels
D- high to signal connect and when placed into suspend
D- high when not transmitting data packets
Full-speed USB devices
12 Mb/s
Wireless mice and keyboards are examples
Legacy phones and music players are examples
Some legacy devices that need battery charging
All signaling performed at 2.0V and 0.8V hi/lo logic levels
D+ high to signal connect and when placed into suspend
D+ high when not transmitting data packets
High-speed USB devices
480 Mb/s
Tablets, phones and music players are examples
Many devices that need battery charging
Connect and suspend signaling performed at 2.0V and 0.8V hi/lo logic levels
Data packet signaling performed a logic levels below 0.8V
D+ high to signal connect and when placed into suspend (same as a full-speed device)
D+ and D- low when not transmitting data packets
Wake On USB
Wake on USB is the ability of a wake configured USB device to wake a computer system from its S3 sleep state back to its S0
working state. Wake on USB requires the data lines to be connected to the system USB host before the system is placed into its
S3 sleep state and remain continuously connected until they are used to wake the system.
The PI5USB2544 supports low and full speed HID (human interface device like mouse/key board) wake function. There are
two scenarios under which wake on mouse are supported by the PI5USB2544. The specific CTL pin changes that the
PI5USB2544 will override are shown below. The information is presented as CTL1, CTL2 and CTL3.The ILIM_SEL pin plays
no role
1.
2.
111 (CDP/SDP2) to 011 (DCP-Auto)
110/010 (SDP1) to 011 (DCP-Auto)
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
16
September 2017
© Diodes Incorporated
PI5USB2544
USB Low-Speed / Full-Speed Device Recognition
PI5USB2544 is capable of detecting LS or FS device attachment when PI5USB2544 is in SDP or CDP mode. Per USB spec
when no device is attached, the D+ and D- lines are near ground level. When a low speed compliant device is attached to the
PI5USB2544 charging port, D- line will be pulled high in its idle state (mouse/keyboard not activated). However when a FS
device is attached the opposite is true in its idle state, i.e. D+ is pulled high and D- remains at ground level.
PI5USB2544 monitors both D+ and D- lines while CTL pin settings are in CDP or SDP mode to detect LS or FS HID device
attachment. To support HID sleep wake, PI5USB2544 must first determine that it is attached to a LS or FS device when system
is in S0 power state. PI5USB2544 does this as described above. While supporting a LS HID wake is straight forward,
supporting FS HID requires making a distinction between a FS and a HS device. This is because a high speed device will
always present itself initially as a full speed device (by a 1.5K pull up resistor on D+). The negotiation for high speed then
makes the distinction whereby the 1.5K pull up resistor gets removed.
PI5USB2544 handles the distinction between a FS and HS device at connect by memorizing if the D+ line goes low after
connect. A HS device after connect will always undergo negotiation for HS which will require the 1.5KΩ resistor pull-up on
D+ to be removed. To memorize a FS device, PI5USB2544 requires the device to remain connected for at least 11 sec while
system is in S0 mode before placing it in sleep or S3 mode. If system is placed in sleep mode earlier than the 11 sec window, a
FS device may not get recognized and hence could fail to wake system from S3. This requirement does not apply for LS device.
No CTL Pin Timing Requirement after Wake Event and Transition from S3 to S0
There is no CTL pin timing requirement for the PI5USB2544 when the wake configured USB device wakes the system from S3
back to S0.
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
17
September 2017
© Diodes Incorporated
PI5USB2544
Device Control Pins Truth Table
Device Control Pins Table lists all valid bias combinations for the four control pins CTL1, CTL2, CTL3 and ILIM_SEL pins
and their corresponding charging mode. It is important to note that the Device Control Pins Table purposely omits matching
charging modes of the PI5USB2544 with global power states (S0-S5) as device is agnostic to system power states.
The PI5USB2544 monitors its CTL inputs and will transition to whatever charging state it is commanded to go to (except when
LS/FS HID device is detected). For example if sleep charging is desired when system is in standby or hibernate state then user
must set PI5USB2544 control pins to correspond to DCP_Auto charging mode per below table. When system is put back to
operation mode then set control pins to correspond to SDP or CDP mode and so on.
PI5USB2544 Device Control Pins Truth Table
CTL1
CTL2
CTL3
ILIM_SEL
MODE
0
0
0
0
Discharge
Current Limit
Setting
NA
0
0
0
0
0
0
0
x
1
1
1
1
0
1
0
0
1
1
1
x
0
1
0
1
Discharge
DCP_Auto
SDP1
SDP1
DCP_Auto
DCP_Auto
NA
ILIM_HI
ILIM_LO
ILIM_HI
ILIM_HI
ILIM_HI
1
1
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
DCP_Shorted
DCP_Shorted
Divider-1A
Divider-1A
SDP1
SDP1
ILIM_LO
ILIM_HI
ILIM_LO
ILIM_HI
ILIM_LO
ILIM_HI
1
1
1
1
1
1
0
1
(1)
SDP2
CDP(1)
Comment
OUT held low
Data lines disconnected
Data lines connected
Data lines disconnected
Data lines disconnected
Device forced to stay in DCP BC1.2
charging mode
Device forced to stay in Divider-1A
charging mode
Data lines connected
ILIM_LO
ILIM_HI
Data lines connected
Note:
(1) No OUT discharge when changing between 1111 and 1110.
Below tables can be used as an aid to program the PI5USB2544 per system states however not restricted to below settings only.
PI5USB2544 Control Pin Setting Matched to System Power States
System Global
Power State
S0
S0
S0
S3/S4/S5
S3
S3
Charging Mode
CTL1
CTL2
CTL3
ILIM_SEL
Current Limit Setting
SDP1
SDP2, no discharge to/from CDP
CDP
1
1
1
1
1
1
0
1
1
1 or 0
0
1
ILIM_HI/ILIM_LO
ILIM_LO
ILIM_HI
Auto mode
Auto mode, keyboard/mouse wake up,
no load detection
SDP1, keyboard/mouse wake up
0
0
1
0
ILIM_HI
0
1
1
0
ILIM_HI
0
1
0
1 or 0
ILIM_HI/ILIM_LO
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
18
September 2017
© Diodes Incorporated
PI5USB2544
CDP/SDP Auto Switch
PI5USB2544 is equipped with a CDP/SDP auto-switch feature to support some popular phones in the market that are not
compliant to the BC1.2 specification, as they fail to establish data connection in CDP mode. These phones use primary
detection (used to distinguish between an SDP and different types of Charging Ports) to only identify ports as SDP (data / no
charge) or DCP (no data / charge). They do not recognize CDP (data /charge) ports. When connected to a CDP port, these
phones classify the port as a DCP and will only charge. Since charging ports are configured as CDP when the computer is in S0,
users do not get the expected data connection.
To remedy this problem PI5USB2544 employs a CDP/SDP Auto Switch scheme to ensure these BC1.2 non-compliant phones
will establish data connection by following below steps:
The PI5USB2544 will determine when a non-compliant phone has wrongly classified a CDP port as a DCP port and
has not made a data connection
The PI5USB2544 will then automatically do a OUT (VBUS) discharge and reconfigure the port as an SDP
This allows the phone to discover it is now connected to an SDP and establish a data connection
The PI5USB2544 will then switch automatically back to CDP without doing an OUT (VBUS) discharge
The phone will continue to operate like it is connected to a SDP since OUT (VBUS) was not interrupted
The port is now ready in CDP if a new device is attached
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 PI5USB2544 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.
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
19
September 2017
© Diodes Incorporated
PI5USB2544
Current-Limit Settings
The PI5USB2544 have two independent current limit settings that are each programmed externally with a resistor.
The ILIM_HI setting is programmed with R ILIM_HI connected between ILIM_HI and GND. The ILIM_LO setting is
programmed with RILIM_LO connected between ILIM_LO and GND. Consult the Device Truth Table to see when each current
limit is used. Both settings have the same relation between the current limit and the programming resistor. RILIM_LO is optional
and the ILIM_LO pin may be left unconnected if the ILIM_SEL is always set high.
The following equation programs the typical current limit:
IOS_TYP (mA)=50250/RLIM_xx (kΩ)
RILIM_XX corresponds to either RILIM_HI or RILIM_LO as appropriate.
Many applications require that the current limit meet specific tolerance limits. When designing to these tolerance limits, both
the tolerance of the PI5USB2544 current limit and the tolerance of the external programming resistor must be taken into
account. The following equations approximate the PI5USB2544 minimum / maximum current limits to within a few mA and
are appropriate for design purposes. These equations assume an ideal – no variation - external programming resistor. To take
resistor tolerance into account, first determine the minimum /maximum resistor values based on its tolerance specifications and
use these values in the equations. Because of the inverse relation between the current limit and the programming resistor, use
the maximum resistor value in the IOS_MIN equation and the minimum resistor value in the IOS_MAX equation.
IOS_MIN (mA)=45271/(RLIM_xx (kΩ))0.98437-30
IOS_MAX (mA) =55325/ (RLIM_xx (kΩ)) 1.0139+30
The traces routing the RILIM_XX resistors should be a sufficiently low resistance as to not affect the current-limit accuracy.
The ground connection for the RILIM_XX resistors is also very important. The resistors need to reference back to the PI5USB2544
GND pin. Follow normal board layout practices to ensure that current flow from other parts of the board does not impact the
ground potential between the resistors and the PI5USB2544 GND pin.
/FAULT Response
The /FAULT open-drain output is asserted (active low) when an over-temperature or current limit condition. The output
remains asserted until the fault condition is removed. The PI5USB2544 is designed to eliminate false /FAULT reporting by
using an internal deglitch circuit for current limit conditions without the need for external circuitry. This ensures that /FAULT
is not accidentally asserted due to normal operation such as starting into a heavy capacitive load. Over-temperature conditions
are not deglitched and assert the /FAULT signal immediately.
Undervoltage Lockout (UVLO)
The undervoltage lockout (UVLO) circuit disables the power switch until the input voltage reaches the UVLO turn on threshold.
Built-in hysteresis prevents unwanted oscillations on the output due to input voltage drop from large current surges.
Thermal Sense
The PI5USB2544 protects itself with thermal sensing circuit that monitor the operating temperature of the power distribution
switch and disables operation if the temperature exceeds recommended operating conditions. The device operates in
constant-current mode during an over-current condition, which increases the voltage drop across power switch.
The power dissipation in the package is proportional to the voltage drop across the power switch, so the junction temperature
rises during an over-current condition. The thermal sensor turns off the power switch when the die temperature exceeds 170°C
regardless of whether the power switch is in current limit. Hysteresis is built into thermal sensor, and the switch turns on after
the device has cooled by approximately 20°C. The switch continues to cycle off and on until the fault is removed.
The open-drain false reporting output /FAULT is asserted (active low) when an over-temperature shutdown condition.
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
20
September 2017
© Diodes Incorporated
PI5USB2544
Application Information
Input and Output Capacitance
Input and output capacitance improves the performance of the device; the actual capacitance should be optimized for the particular
application. For all applications, a 0.1uF or greater ceramic bypass capacitor between IN and GND is recommended as close to the
device as possible for local noise decoupling. This precaution reduces ringing on the input due to power-supply transients.
Additional input capacitance may be needed on the input to reduce voltage overshoot from exceeding the absolute-maximum
voltage of the device during heavy transient conditions or output shorting. This is especially important during bench testing when
long inductive cables are used to connect the evaluation board to the bench power supply. Normally suggested the distance
between IC and DC supply is less than 15cm.
Output capacitance also needs to be close to IC as possible. When large transient currents are expected on the output, placing a
high-value electrolytic capacitor on the output pin is recommended.
Layout Design Guideline
1. The PCB is suggested to use at least 4 layers
2. The high speed differential pair should be maintain 90Ω
3. Do not route the high speed signal over any split plane
4. Minimized the number of vias and corners on the high speed trace for reducing the signal reflections and impedance
changes
5. If it’s necessary to turn 90°, use two 45° turns or an arc instead of making a single 90° turn. This can reduces reflections on
the signal by minimizing impedance discontinuities.
6. The high speed trace should be routed symmetrically and parallelism (including the test points on the high speed trace).
The non-parallelism trace will cause the impedance discontinuities and affect the signal quality
7. Avoid any unnecessary stubs on the differential pair. The stubs will introduce the signal reflections which affect the signal
quality
8. Avoid routing the high speed differential pair under the crystal, oscillator, clock synthesizer, magnetic devices or ICs to
cause the interference.
9. Avoid anti-etch on the GND plane
Typical Application Circuit
10k
22k
13
GND
FAULT#
14
15
NC
CTL3
ILIM_SEL
PI5USB2544
11
10
9 NC
VBUS
DD+
GND
NC pin connect to GND or leave open
uP
Document Number DS40167 Rev 1-2
12
USB
Connector
8
EN
ILIM_LO
16
DP_IN
5
ILIM_SEL
120uF
DP_OUT
EN
4
C3
DM_IN
U1
CTL2
3
DM_OUT
VBUS_OUT
OUT
7
2
USB Host
IN
CTL1
1
ILIM_HI
C1
0.1uF
R3
R1
R2
6
C2
10uF
NA
VBUS_IN
Exp_Pad
DC Power
BUS
80.6k
Differential
PI5USB2544ZHE@TQFN16
www.diodes.com
21
September 2017
© Diodes Incorporated
PI5USB2544
Mechanical Information
UGFN 3.0x3.0-16ZHD
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
22
September 2017
© Diodes Incorporated
PI5USB2544
TQFN 3.0x3.0-16ZH
Ordering Information
Part No.
PI5USB2544ZHDEX
PI5USB2544ZHEX
Package Code
ZHD
ZH
Package
16-pin, 3.0x3.0 (UQFN)
16-pin, 3.0x3.0 (TQFN)
Notes:
Thermal characteristics can be found on the company web site at www.diodes.com/design/support/packaging/
E = Pb-free and Green
X suffix = Tape/Reel
PI5USB2544
Document Number DS40167 Rev 1-2
www.diodes.com
23
September 2017
© Diodes Incorporated
PI5USB2544
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE
LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this
document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product
described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this
document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose
products are represented on Diodes Incorporated website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes
Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or
death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also
be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative
format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the
Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to
result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and
agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in
such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated.
Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such
safety-critical, life support devices or systems.
Copyright © 2016, Diodes Incorporated
www.diodes.com
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