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PDF PI5PD2561 Data sheet ( Hoja de datos )
| Número de pieza | PI5PD2561 | |
| Descripción | Adjustable Current-Limited Power Switch | |
| Fabricantes | Pericom Semiconductor Corporation | |
| Logotipo |  |
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PI5PD2560/2561
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Dual Channel, Adjustable Current -Limited Power Switch
Features
Description
Two separate current limiting channels
Meets USB Current-Limiting Requirement
±7.5% Current-Limit Accuracy at 2.8A
Adjustable Current Limit, 250mA-2.8A (typ)
Fast Over-current Response - 3.5μS (typ)
44mΩ High-Side MOSFET
Operating Range: 2.5 V to 5.5V
2μA Maximum Standby Supply Current
Reverse Input-Output Voltage Protection
Built-in Soft-Start
15 kV / 8 kV System-Level ESD Capable
Device Package: TDFN 3x3-10L
UL Listed – File No. E341484
CB Certified
Applications
USB Ports/Hubs
Digital TV
Set-Top Boxes
VOIP Phones
Pin Configuration
The PI5PD2560/2561 is dual-channel power-distribution
switch intended for applications where precision current
limiting is required or heavy capacitive loads and short
circuits are encountered. These devices offer a
programmable current-limit threshold between 250 mA
and 2.8A (typ) per channel via an external resistor. The
power-switch rise and fall times are controlled to
minimize current surges during turn on/off.
Each channel of the PI5PD2560/2561 devices limit the
output current to a safe level by switching into a
constant-current mode when the output load exceeds the
current-limit threshold.
The FAULTx logic output for each channel
independently asserts low during over-current or over
temperature.
Typical Application Circuit
VIN
IN O UT1
GND
IN
IN
EN1
EN2
1
2
3
4
5
10 /FAULT1
9 OUT1
8 OUT2
7 ILIM
6 /FAULT2
TDFN3.0x3.0-10L(Top View)
R1
100k
R2
100k
Logic signal
C1 IN
C2
0.1uF
O UT2
/FAU LT1
/FAU LT2
IL IM
E N1
E N2
G ND
P ow er Pad
C3
R3
C4
Pin Description
Pin No.
1
2, 3
4
5
6
7
8
9
10
Pin Name
PI5PD2560 PI5PD2561
GND
IN
/EN1
EN1
/EN2
EN2
/FAULT2
ILIM
OUT2
OUT1
/FAULT1
Type
-
I
I
I
O
I
O
O
O
Description
Ground.
Power input voltage.
Enable input, logic low/high turns on channel one power switch.
Enable input, logic low/high turns on channel two power switch.
Active-low open-drain output, asserted during over-current or
over-temperature condition occur on channel 2
External resistor used to set current-limit threshold; recommended
20 kΩ ≤ RILIM ≤ 187 kΩ.
Power switch output for channel two
Power switch output for channel one
Active-low open-drain output, asserted during over-current or
over-temperature condition occur on channel 1
2016-03-0004
PT0489-5 04/29/16
1
1 page  
PI5PD2560/2561
Dual Channel,
Adjustable Current-Limited Power Switch
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TYPICAL CHARACTERISTICS (Continued)
Figure 4. UVLO – Under voltage Lockout – V
Figure 5. IIN – Supply Current, Output Disabled – nA
Figure 6. IIN – Supply Current, Output Enabled – µA
Figure 7. IIN – Supply Current, Output Enabled – µA
2016-03-0004
PT0489-5 04/29/16
5
5 Page 
PI5PD2560/2561
Dual Channel,
Adjustable Current-Limited Power Switch
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AUTO-RETRY FUNCTIONALITY
Some applications require that an overcurrent condition disables the part momentarily during a fault condition and re-enables after
a pre-set time. This auto-retry functionality can be implemented with an external resistor and capacitor. During a fault condition,
FAULTx pulls ENx low disabling the part. The part is disabled when ENx is pulled below the turn-off threshold, and FAULTx
goes high impedance allowing CRETRY to begin charging. The part re-enables when the voltage on ENx reaches the turn-on
threshold, and the auto-retry time is determined by the resistor/capacitor time constant. The part will continue to cycle in this
manner until the fault condition is removed.
VIN
IN O UT1
R1
100k
R2
100k
C1
0.1uF
IN
O UT2
C2
0.22uF
C3
0.22uF
/FAU LT1
E N1
IL IM
/FAU LT2
E N2
G ND
P ow er Pad
VOU T1
C3
VOU T2
C2
R3
20k
Figure 10.Auto-Retry Functionality
Some applications require auto-retry functionality and the ability to enable/disable with an external logic signal. The figure below
shows how an external logic signal can drive EN through RFAULT and maintain auto-retry functionality. The resistor/capacitor
time constant determines the auto-retry time-out period.
Logic signal & drivers
R1
100k
R2
100k
VIN
IN
C1
0.1uF
IN
O UT1
O UT2
C2 C3
0.22uF 0.22uF
/FAU LT1
E N1
IL IM
/FAU LT2
E N2
G ND
P ow er Pad
VOU T1
C3
VOU T2
C2
R3
20k
Figure 11.Auto-Retry Functionality With External EN Signal
2016-03-0004
PT0489-5 04/29/16
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet PI5PD2561.PDF ] | |
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