|
|
PDF AP2172A Data sheet ( Hoja de datos )
| Número de pieza | AP2172A | |
| Descripción | 1.0A DUAL CHANNEL CURRENT-LIMITED POWER SWITCH | |
| Fabricantes | Diodes | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AP2172A (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
|
No Preview Available !
AP2162A/AP2172Awww.DataSheet4U.com
1.0A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH WITH OUTPUT DISCHARGE
Description
Pin Assignments
The AP2162A and AP2172A are dual channel current-limited
integrated high-side power switches optimized for Universal
Serial Bus (USB) and other hot-swap applications. The family
of devices complies with USB standards and available with
both polarities of Enable input.
The devices have fast short-circuit response time for
improved overall system robustness, and have integrated
output discharge function to ensure completely controlled
discharging of the output voltage capacitor. They provide a
complete protection solution for application subject to heavy
capacitive loads and the prospect of short circuit, and offer
reverse current blocking, over-current, over-temperature 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-EP and
DFN3030E-8 packages.
Features
• Dual channel current-limited power switch with output
discharge
• Fast short-circuit response time: 2µs
• 1.4A accurate current limiting
• Reverse Current Blocking
• 85mΩ on-resistance
• Input voltage range: 2.7V – 5.5V
• Built-in soft-start with 0.6ms typical rise time
• Short circuit and thermal protection
• Fault report (FLG) with blanking time (7ms typ)
• ESD protection: 2KV HBM, 300V MM
• Active high (AP2172A) or active low (AP2162A) enable
• Ambient temperature range: -40ºC to 85°C
• SO-8, MSOP-8-EP and DFN3030E-8 (Exposed Pad):
Available in “Green” Molding Compound (No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)
• UL Recognized, File Number E322375
• IEC60950-1 CB Scheme Certified
( Top View )
GND 1
8 FLG1
IN 2
7 OUT1
EN1 3
EN2 4
SO-8
6 OUT2
5 FLG2
GND
IN
EN1
EN2
1
2
3
4
( Top View )
8 FLG1
7 OUT1
6 OUT2
5 FLG2
MSOP-8-EP
( Top View )
GND 1
IN 2
EN1 3
EN2 4
DFN3030E-8
8 FLG1
7 OUT1
6 OUT2
5 FLG2
Applications
• LCD TVs & Monitors
• Set-Top-Boxes, Residential Gateways
• Laptops, Desktops, Servers,
• Printers, Docking Stations, HUBs
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.
AP2162A/2172A
Document number: DS32192 Rev. 1 - 2
1 of 17
www.diodes.com
May 2010
© Diodes Incorporated
1 page  
AP2162A/AP2172Awww.DataSheet4U.com
1.0A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH WITH OUTPUT DISCHARGE
Typical Performance Characteristics
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: AP2162A (left), AP2172A (right)
Figure 2. Response Time to Short Circuit Waveform
All Enable Plots are for AP2162A Active Low
Turn-On Delay and Rise Time
Turn-Off Delay and Fall Time
EN
5V/div
Iin
500mA/div
EN
5V/div
Iin
500mA/div
CL=1μF
TA=25°C
RL=5Ω
Vout
2V/div
500us/div
CL=1μF
TA=25°C
RL=5Ω
Vout
2V/div
500us/div
AP2162A/2172A
Document number: DS32192 Rev. 1 - 2
5 of 17
www.diodes.com
May 2010
© Diodes Incorporated
5 Page 
AP2162A/AP2172Awww.DataSheet4U.com
1.0A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH WITH OUTPUT DISCHARGE
Application Note
Power Supply Considerations
A 0.1μF to 1μF X7R or X5R ceramic bypass capacitor between IN and GND, close to the device, is
recommended. Placing a high-value electrolytic capacitor on the input and output pin(s) is recommended when
the output load is heavy. This precaution reduces power-supply transients that may cause ringing on the input.
Additionally, bypassing the output with a 1μF ceramic capacitor improves the immunity of the device to short-
circuit transients.
Over-current and Short Circuit Protection
An internal sensing FET is employed to check for over-current conditions. Unlike current-sense resistors, sense
FETs do not increase the series resistance of the current path. When an overcurrent condition is detected, the
device maintains a constant output current and reduces the output voltage accordingly. Complete shutdown
occurs only if the fault stays long enough to activate thermal limiting.
Three possible overload conditions can occur. In the first condition, the output has been shorted to GND before
the device is enabled or before VIN has been applied. The AP2162A/AP2172A senses the short circuit and
immediately clamps output current to a certain safe level namely ILIMIT.
In the second condition, an output short or an overload occurs while the device is enabled. At the instance the
overload occurs, higher inrush current may flow for a very short period of time before the current limit function can
react. The input capacitor(s) rapidly discharge through the device, activating current limit circuitry. Protection is
achieved by momentarily opening the P-MOS high-side power switch and then gradually turning it on. After the
current limit function has tripped (reached the over-current trip threshold), the device switches into current limiting
mode and the current is clamped at ILIMIT. The threshold for activating current limiting is 1.4A typical per channel.
In the third condition, the load has been gradually increased beyond the recommended operating current. The
current is permitted to rise until the current-limit threshold (ITRIG) is reached or until the thermal limit of the device is
exceeded. The AP2162A/AP2172A is capable of delivering current up to the current-limit threshold without
damaging the device. Once the threshold has been reached, the device switches into its current limiting mode and
is set at ILIMIT.
FLG Response
When an over-current or over-temperature shutdown condition is encountered, the FLG open-drain output goes
active low after a nominal 7-ms deglitch timeout. The FLG output remains low until both over-current and over-
temperature conditions are removed. Connecting a heavy capacitive load to the output of the device can cause a
momentary over-current condition, which does not trigger the FLG due to the 7-ms deglitch timeout. The
AP2162A/AP2172A is designed to eliminate false over-current reporting without the need of external components
to remove unwanted pulses.
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
AP2162A/2172A
Document number: DS32192 Rev. 1 - 2
11 of 17
www.diodes.com
May 2010
© Diodes Incorporated
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet AP2172A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AP2172 | 1A DUAL CHANNEL CURRENT-LIMITED POWER SWITCH |  Diodes Incorporated |
| AP2172A | 1.0A DUAL CHANNEL CURRENT-LIMITED POWER SWITCH | Diodes |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |