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PDF AP2171 Data sheet ( Hoja de datos )
| Número de pieza | AP2171 | |
| Descripción | 1A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH | |
| Fabricantes | Diodes | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AP2171 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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AP2161/ AP2171
1A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Description
The AP2161 and AP2171 are integrated high-side power switches
optimized for Universal Serial Bus (USB) and other hot-swap
applications. The family of devices complies with USB 2.0 and is
available with both polarities of Enable input. They offer current and
thermal limiting and short-circuit protection as well as controlled rise
time and undervoltage lockout functionality. A 7ms deglitch capability
on the open-drain Flag output prevents false overcurrent reporting
and does not require any external components.
All devices are available in SO-8, MSOP-8EP, SOT25, and
U-DFN2018-6 packages
Features
Single USB Port Power Switches
Overcurrent and Thermal Protection
1.5A Accurate Current Limiting
Reverse Current Blocking
95mΩ On-Resistance
Input Voltage Range: 2.7V – 5.5V
0.6ms Typical Rise Time
Very Low Shutdown Current: 1µA (max)
Fault Report (FLG) with Blanking Time (7ms typ)
ESD Protection: 4kV HBM, 300V MM
Active Low (AP2161) or Active High (AP2171) Enable
Ambient Temperature Range: -40°C to +85°C
SOT25, SO-8, MSOP-8EP (Exposed Pad), and U-DFN2018-6:
Available in “Green” Molding Compound (No Br, Sb)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green Device (Note 3)
UL Recognized, File Number E322375
IEC60950-1 CB Scheme Certified
Applications
Consumer Electronics – LCD TVs & Monitors, Game Machines
Communications – Set-Top-Boxes, GPS, Smartphones
Computing – Laptops, Desktops, Servers, Printers, Docking
Station, HUB
Pin Assignments
GND 1
( Top View )
8 NC
IN 2
7 OUT
IN 3
6 OUT
EN 4
SO-8
5 FLG
GND
IN
IN
EN
1
2
3
4
( Top View )
8 NC
7 OUT
6 OUT
5 FLG
MSOP-8EP
( Top View )
OUT 1
GND 2
FLG 3
5 IN
4 EN
SOT25
( Top View )
GND 1
6 OUT
IN 2
5 OUT
EN 3
4 FLG
U-DFN2018-6
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AP2161/ AP2171
Document number: DS31564 Rev. 9 - 2
1 of 18
www.diodes.com
August 2015
© Diodes Incorporated
1 page  
Typical Performance Characteristics
AP2161/ AP2171
VEN
VOUT
50%
50%
VEN
50%
50%
TR
TD(ON)
90%
10%
TD(OFF)
TF
90%
10%
VOUT
TR
TD(ON)
90%
10%
TD(OFF)
TF
90%
10%
Figure 1 Voltage Waveforms: AP2161 (left), AP2171 (right)
All Enable Plots are for AP2171 Active High
Turn-On Delay and Rise Time
Turn-Off Delay and Fall Time
Ven
5V/div
Vout
2V/div
500µs/div
Ven
5V/div
CL = 1µF
TA = +25°C
RL = 10Ω
Vout
2V/div
Turn-On Delay and Rise Time
CL = 1µF
TA = +25°C
RL = 10Ω
500µs/div
Turn-Off Delay and Fall Time
Ven
5V/div
Vout
2V/div
500µs/div
Ven
5V/div
CL = 100µF
TA = +25°C
RL = 10Ω
Vout
2V/div
500µs/div
CL = 100µF
TA = +25°C
RL = 10Ω
AP2161/ AP2171
Document number: DS31564 Rev. 9 - 2
5 of 18
www.diodes.com
August 2015
© Diodes Incorporated
5 Page 
AP2161/ AP2171
Application Information (continued)
Undervoltage Lockout (UVLO)
Undervoltage lockout function (UVLO) keeps the internal power switch from being turned on until the power supply has reached at least 1.9V, even
if the switch is enabled. Whenever the input voltage falls below approximately 1.9V, the power switch is quickly turned off. This facilitates the design
of hot-insertion systems where it is not possible to turn off the power switch before input power is removed.
Host/Self-Powered And Bus-Powered HUBs
Hosts and self-powered hubs have a local power supply that powers the embedded functions and the downstream ports (see Figure 2). This power
supply must provide from 5.25V to 4.75V to the board side of the downstream connection under full-load and no-load conditions. Hosts and SPHs
are required to have current-limit protection and must report over-current conditions to the USB controller. Typical SPHs are desktop PCs, monitors,
printers, and stand-alone hubs.
USB Control
Power Supply
3.3V
5V
AP2161
2,3
IN
0.1uF
5
4
FLG
EN
GND
1
6,7
OUT
Downstream
USB Ports
D+
D-
0.1uF 120uF
VBUS
GND
Figure 2 Typical One-Port USB Host / Self-Powered Hub
Generic Hot-Plug Applications
In many applications it may be necessary to remove modules or pc boards while the main unit is still operating. These are considered hot-plug
applications. Such implementations require the control of current surges seen by the main power supply and the card being inserted. The most
effective way to control these surges is to limit and slowly ramp the current and voltage being applied to the card, similar to the way in which a
power supply normally turns on. Due to the controlled rise and fall times of the AP2161/AP2171, these devices can be used to provide a softer
start-up to devices being hot-plugged into a powered system. The UVLO feature of the AP2161/AP2171 also ensures that the switch is off after the
card has been removed, and that the switch is off during the next insertion.
By placing the AP2161/AP2171 between the VCC input and the rest of the circuitry, the input power reaches these devices first after insertion. The
typical rise time of the switch is approximately 1ms, providing a slow voltage ramp at the output of the device. This implementation controls system
surge current and provides a hot-plugging mechanism for any device.
Dual-Purpose Port Applications
AP2161/AP2171 is not recommended for use in dual-purpose port applications in which a single port is used for data communication between the
host and peripheral devices while simultaneously maintaining a charge to the battery of the peripheral device. An example of such a non-
recommended application is a shared HDMI/MHL (Mobile High-definition Link) port that allows streaming video between an HDTV or set-top box
and a smartphone or tablet while maintaining a charge to the smartphone or tablet battery. If a voltage is maintained across the output of the
AP2161/AP2171 when the output is disabled and the VIN of the device is subsequently ramped up, an overstress condition to the AP2161/AP2171
may result.
AP2161/ AP2171
Document number: DS31564 Rev. 9 - 2
11 of 18
www.diodes.com
August 2015
© Diodes Incorporated
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet AP2171.PDF ] | |
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