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PDF AP2191D Data sheet ( Hoja de datos )
| Número de pieza | AP2191D | |
| Descripción | 1.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH | |
| Fabricantes | Diodes Incorporated | |
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AP2181D/AP2191Dwww.DataSheet4U.com
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH WITH OUTPUT DISCHARGE
Description
Pin Assignments
The AP2181D and AP2191D 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 available with both polarities of Enable input.
They offer current and thermal limiting and short circuit
protection as well as controlled rise time and under-voltage
lockout functionality. A 7ms deglitch capability on the open-
drain Flag output prevents false over-current reporting and
does not require any external components.
All devices are available in SO-8, MSOP-8, MSOP-8-EP,
SOT25, and DFN2018-6 packages.
Features
• Single USB port power switches with output discharge
• Over-current and thermal protection
• 2.1A accurate current limiting
• Fast transient response
• Reverse Current Blocking
• 90mΩ on-resistance
• Input voltage range: 2.7V – 5.5V
• 0.6ms typical rise time
• Very low shutdown current: 1uA (max)
• Fault report (FLG) with blanking time (7ms typ)
• ESD protection: 4KV HBM, 300V MM
• Active high (AP2191D) or active low (AP2181D) enable
• Ambient temperature range -40ºC to 85°C
• SO-8, MSOP-8, MSOP-8-EP (Exposed Pad), SOT25, and
DFN2018-6: Available in “Green” Molding Compound (No
Br, Sb)
• Lead Free Finish / RoHS Compliant (Note 1)
• UL Recognized, File Number E322375 (pending)
• IEC60950-1 CB Scheme Certified
Applications
• Consumer electronics – LCD TV & Monitor, Game
Machines
• Communications – Set-Top-Box, GPS, Smartphone
• Computing – Laptop, Desktop, Servers, Printers, Docking
Station, HUB
GND 1
( Top View )
8 NC
IN 2
7 OUT
IN 3
6 OUT
EN 4
SO-8
5 FLG
( Top View )
GND
IN
IN
EN
1
2
3
4
8 NC
7 OUT
6 OUT
5 FLG
MSOP-8 / MSOP-8-EP
Note: latter with exposed pad (dotted line)
( Top View )
OUT
GND
FLG
1
2
3
5 IN
4 EN
SOT25
( Top View )
GND 1
6 OUT
IN 2
5 OUT
EN 3
4 FLG
DFN2018-6
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
AP2181D/2191D
Document number: DS32251 Rev. 1 - 2
1 of 18
www.diodes.com
June 2010
© Diodes Incorporated
1 page  
AP2181D/AP2191Dwww.DataSheet4U.com
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH WITH OUTPUT DISCHARGE
Typical Performance Characteristics
VEN
VOUT
50%
50%
TR
TD(ON)
90%
10%
TD(OFF)
TF
90%
10%
VEN
VOUT
50%
50%
TR
TD(ON)
90%
10%
TD(OFF)
TF
90%
10%
Figure 1. Voltage Waveforms: AP2181D (left), AP2191D (right)
All Enable Plots are for AP2181D Active Low
Turn-On Delay and Rise Time
Ven
5V/div
Turn-Off Delay and Fall Time
Ven
5V/div
Vout
2V/div
Ven
5V/div
CL=1uF
TA=25°C
RL=10Ω
Vout
2V/div
CL=1uF
TA=25°C
RL=10Ω
100us/div
Turn-On Delay and Rise Time
100us/div
Turn-Off Delay and Fall Time
Ven
5V/div
Vout
2V/div
500us/div
Vout
2V/div
CL=120uF
TA=25°C
RL=10Ω
500us/div
CL=120uF
TA=25°C
RL=10Ω
AP2181D/2191D
Document number: DS32251 Rev. 1 - 2
5 of 18
www.diodes.com
June 2010
© Diodes Incorporated
5 Page 
AP2181D/AP2191Dwww.DataSheet4U.com
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH WITH OUTPUT DISCHARGE
Application Note (Continued)
Power Dissipation and Junction Temperature
The low on-resistance of the internal MOSFET allows the small surface-mount packages to pass large current.
Using the maximum operating ambient temperature (TA) and RDS(ON), the power dissipation can be calculated by:
PD = RDS(ON)× I2
Finally, calculate the junction temperature:
TJ = PD x RθJA + TA
Where:
TA= Ambient temperature °C
RθJA = Thermal resistance
PD = Total power dissipation
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 times and fall times of the AP2181D/AP2191D, 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
AP2181D/AP2191D 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 AP2181D/AP2191D 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.
AP2181D/2191D
Document number: DS32251 Rev. 1 - 2
11 of 18
www.diodes.com
June 2010
© Diodes Incorporated
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet AP2191D.PDF ] | |
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