|
|
PDF AP2553 Data sheet ( Hoja de datos )
| Número de pieza | AP2553 | |
| Descripción | (AP2552x / AP2553x) PRECISION ADJUSTABLE CURRENT-LIMITED POWER SWITCHES | |
| Fabricantes | Diodes | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AP2553 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
AP2552/ AP2553/ AP2552A/ AP2553A
PRECISION ADJUSTABLE CURRENT-LIMITED POWER SWITCHES
Description
Pin Assignments
The AP2552/53and AP2552A/53A are single channel precision
adjustable current-limited switches optimized for the applications
require precision current limiting or to provide up to 2.1A of
continuous load current during heavy loads/short circuits. These
devices offer a programmable current-limit threshold between 75mA
and 2.35A (typ) via an external resistor. Current limit accuracy ±6%
can be achieved at high current-limit settings. The rise and fall times
are controlled to minimize current surges during turn on/off.
The devices have fast short-circuit response timefor improved overall
system robustness. They provide a complete protection solution for
applications subject to heavy capacitive loads and the prospect of
short circuit, offering reverse current blocking and limiting, 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.
AP2552/53 limits the output current to a safe level when the output
current exceeds current-limit threshold.
(Top View)
OUT
ILIM
FAULT
16
2 PAD 5
34
IN
GND
EN
IN
GND
EN
Features
U-DFN2020C-6
(Top View)
16
25
34
SOT26
OUT
ILIM
FAULT
AP2552A/53A provides latch-off function during over-current or
reverse-voltage conditions.
All devices are available in SOT26 and U-DFN2020C-6 packages.
Applications
• Set-Top-Boxes
• LCD TVs & Monitors
• Residential Gateways
• Laptops, Desktops, Servers, e-Readers, Printers, Docking
Stations, HUBs
•
•
•
•
•
http://www.DataSheet4U.net/
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Up to 2.1A maximum load current
Accurate adjustable current limit, 75mA - 2350mA
±6% accurate adjustable current limit, 1.61A with RLIM = 15kΩ
Constant-current (AP2552/53) during over-current
Output latch-off (AP2552A/53A) at over-current
Fast short-circuit response time: 2µs (typ)
Reverse current blocking during shutdown and reverse current
limiting during enable
Operating range: 2.7V – 5.5V
Built-in soft-start with 3ms typical rise time
Over-current , output over-voltage and thermal protection
Fault report (FAULT) with blanking time
ESD protection: 2kV HBM, 500V CDM
Active low (AP2552/52A) or active high (AP2553/53A) enable
Ambient temperature range: -40ºC to +85°C
SOT26 and DFN2020-6 package: 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)
15kV ESD Protection per IEC 61000-4-2 (with external
capacitance)
UL Recognized, File Number (to be completed)
IEC60950-1 CB Scheme Certified (to be completed)
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 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.
AP2552/AP2553/AP2552A/AP2553A
Document number: DS35404 Rev. 5 - 2
1 of 16
www.diodes.com
December 2012
© Diodes Incorporated
datasheet pdf - http://www.DataSheet4U.net/
1 page  
AP2552/ AP2553/ AP2552A/ AP2553A
Electrical Characteristics (@TA = +25°C, VIN = 2.7V to 5.5V, VEN = 0V or VEN = VIN, RFAULT = 10kΩ, unless otherwise specified.)
Symbol
Supply
VUVLO
ΔVUVLO
ISHDN
Parameter
Input UVLO
Input UVLO Hysteresis
Input Shutdown Current
IQ Input Quiescent Current
IREV Reverse Leakage Current
Power Switch
RDS(ON) Switch On-Resistance
tR Output Turn-On Rise Time
tF Output Turn-Off Fall Time
Current Limit
ILIMIT
Current-Limit Threshold
(maximum DC output current),
VOUT = VIN -0.5V
ISHORT
Short-Circuit Current Limit, OUT
connected to GND
tSHORT Short-Circuit Response Time
Enable Pin
ILEAK-EN EN Input Leakage Current
tON Turnon Time
tOFF Turnoff Time
Output Discharge
RDIS Discharge Resistance (Note 7)
RDIS_LATCH
Discharge Resistance During
Latch-Off
Test Conditions (Note 6)
VIN rising
VIN decreasing
VIN = 5.5V, disabled, OUT = open
VIN = 5.5V, enabled, OUT = open, RLIM = 20kΩ
VIN = 5.5V, enabled, OUT = open, RLIM = 210kΩ
Disabled, VIN = 0V, VOUT = 6V, IREV at VIN
SOT26 package,
TJ = +25°C, VIN = 5.0V
-40oC ≤ TA ≤ +85°C
U-DFN2020-6 package
TJ = +25°C, VIN = 5.0V
-40oC ≤ TA ≤ +85°C
VIN = 5.5V, CL = 1µF, RLOAD = 100Ω. See Figure 1
VIN = 2.7V, CL = 1µF, RLOAD = 100Ω.
VIN = 5.5V, CL = 1µF, RLOAD = 100Ω. See Figure 1
VIN = 2.7V, CL = 1µF, RLOAD = 100Ω.
RLIM = 10kΩ
RLIM = 15kΩ
-40°C ≤ TA ≤ +85°C
-40°C ≤ TA ≤ +85°C
RLIM = 20kΩ
http://www.DataSheet4U.net/
TJ = +25°C
-40°C ≤ TA ≤ +85°C
RLIM = 49.9kΩ
RLIM = 210kΩ
TJ = +25°C
-40°C ≤ TA ≤ +85°C
ILIM shorted to IN or GND
RLIM = 10kΩ
RLIM = 15kΩ
RLIM = 20kΩ
RLIM = 49.9kΩ
RLIM = 210kΩ
ILIM shorted to IN or GND
VOUT = 0V to IOUT = ILIMIT (OUT shorted to ground)
See Figure 2
VIN = 5V, VEN = 0V and 6V
CL = 1µF, RL = 100Ω. See Figure 1
CL = 1µF, RL = 100Ω. See Figure 1
VIN = 5V, disabled, IOUT =1mA
VIN = 5V, latch-off, AP2552A/53A only
Min Typ Max
2.4
25
0.1
100
80
0.01
2.65
1
140
120
1
70 95
135
80 105
150
1.1 1.5
0.7 1
0.1 0.5
0.1 0.5
2200
1540
1180
1160
500
485
121
50
2365
1632
1251
1251
530
529
142
75
2620
1820
1380
570
150
75
2542
1730
1326
1340
562
573
162
100
2
-0.5 0.5
3
1
600
1000
Notes:
6. Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately.
7. The discharge function is active when the device is disabled (when enable is de-asserted or during power-up power-down when VIN< VUVLO).
The discharge function offers a resistive discharge path for the external storage capacitor for limited time.
Unit
V
mV
µA
µA
µA
µA
mΩ
ms
ms
ms
ms
mA
mA
µs
µA
ms
ms
Ω
Ω
AP2552/AP2553/AP2552A/AP2553A
Document number: DS35404 Rev. 5 - 2
5 of 16
www.diodes.com
December 2012
© Diodes Incorporated
datasheet pdf - http://www.DataSheet4U.net/
5 Page 
AP2552/ AP2553/ AP2552A/ AP2553A
Application Note (cont.)
Reverse-Current and Reverse-Voltage Protection (cont.)
For AP2552A/53A, once ROVP is activated and when the condition exists for more than 5ms (TYP), output device is disabled and shutdown.
This is called the "Time from Reverse-Voltage Condition to MOSFET Turn Off”. FAULT assertion occurs at a de-glitch time of 4ms after ROVP is
reached. Recovery from this fault is achieved by recycling power or toggling EN. FAULT de-assertion de-glitch time is same as the de-assertion
time.
Special Functions:
Discharge Function
When enable is de-asserted, or when the input voltage is under UVLO level, the discharge function is active. The output capacitor is discharged
through an internal NMOS that has a discharge resistance of 100Ω. Hence, the output voltage drops down to zero. The time taken for discharge
is dependent on the RC time constant of the resistance and the output capacitor.
FAULT Response
The FAULT open-drain output goes active low for any of following faults: Current limit threshold, short- circuit current limit, reverse-voltage
condition or thermal shutdown. The time from when a fault condition is encountered to when the FAULT output goes low is 7ms (TYP). The
FAULT output remains low until over-current, short-circuit current limit 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 FAULT due to the 7ms
deglitch timeout. This 7-ms timeout is also applicable for over-current recovery and over-temperature recovery. The AP2552/53 and
AP2552-2/53A are designed to eliminate erroneous over-current reporting without the need for external components, such as an RC delay
network.
For the AP2552/53 and AP2552A/53A when the reverse voltage condition is triggered, FAULT output goes low after 4ms (TYP). This 4ms (TYP)
timeout is also applicable for the recovery from reverse voltage fault.
When the ILIM pin is shorted to IN or GND, current-limit threshold and short-circuit current limit will be clamped at typically 75mA.When the ILIM
pin is shorted to IN or GND the AP2552/53 and AP2552A/53A FAULT pin willhttp://www.DataSheet4U.net/ not assert during current limiting conditions; The FAULT pin will
assert during short circuit conditions.
Power Supply Considerations
A 0.01-μF to 0.1-μF X7R or X5R ceramic bypass capacitor between IN and GND, close to the device, is recommended. This limits the input
voltage drop during line transients. Placing a high-value electrolytic capacitor on the input (10μF minimum) and output pin(120µF) is
recommended when the output load is heavy. This precaution also reduces power-supply transients that may cause ringing on the input.
Additionally, bypassing thedeviceoutput with a 0.1μF to 4.7μF ceramic capacitor improves the immunity of the device to short-circuit transients.
This capacitor also prevents output from going negative during turn-off due to parasiticinductance.
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 θJA + TA
Where:
TA= Ambient temperature °C
θJA = 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 AP2552/53 AND AP2552A/53A, 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 AP2552/53 AND AP2552A/53A also
ensures that the switch is off after the card has been removed, and that the switch is off during the next insertion.
AP2552/AP2553/AP2552A/AP2553A
Document number: DS35404 Rev. 5 - 2
11 of 16
www.diodes.com
December 2012
© Diodes Incorporated
datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AP2553.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AP2552 | (AP2552x / AP2553x) PRECISION ADJUSTABLE CURRENT-LIMITED POWER SWITCHES | Diodes |
| AP2552A | (AP2552x / AP2553x) PRECISION ADJUSTABLE CURRENT-LIMITED POWER SWITCHES | Diodes |
| AP2553 | (AP2552x / AP2553x) PRECISION ADJUSTABLE CURRENT-LIMITED POWER SWITCHES | Diodes |
| AP2553A | (AP2552x / AP2553x) PRECISION ADJUSTABLE CURRENT-LIMITED POWER SWITCHES | 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 |