Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

AP2191DFMG-7 Datasheet(PDF) 10 Page - Diodes Incorporated

Part # AP2191DFMG-7
Description  1.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE
Download  18 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

AP2191DFMG-7 Datasheet(HTML) 10 Page - Diodes Incorporated

Back Button AP2191DFMG-7 Datasheet HTML 6Page - Diodes Incorporated AP2191DFMG-7 Datasheet HTML 7Page - Diodes Incorporated AP2191DFMG-7 Datasheet HTML 8Page - Diodes Incorporated AP2191DFMG-7 Datasheet HTML 9Page - Diodes Incorporated AP2191DFMG-7 Datasheet HTML 10Page - Diodes Incorporated AP2191DFMG-7 Datasheet HTML 11Page - Diodes Incorporated AP2191DFMG-7 Datasheet HTML 12Page - Diodes Incorporated AP2191DFMG-7 Datasheet HTML 13Page - Diodes Incorporated AP2191DFMG-7 Datasheet HTML 14Page - Diodes Incorporated Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 18 page
background image
AP2181D/AP2191D
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH WITH OUTPUT DISCHARGE
AP2181D/2191D
Document number: DS32251 Rev. 1 - 2
10 of 18
www.diodes.com
June 2010
© Diodes Incorporated
Application Note (Continued)
Thermal Protection
Thermal protection prevents the IC from damage when the die temperature exceeds safe margins. This mainly
occurs when heavy-overload or short-circuit faults are present for extended periods of time. The
AP2181D/AP2191D implements a thermal sensing to monitor the operating junction temperature of the power
distribution switch. Once the die temperature rises to approximately 140°C, the Thermal protection feature gets
activated as follows: The internal thermal sense circuitry turns the power switch off and the FLG output is asserted
thus preventing the power switch from damage. Hysteresis in the thermal sense circuit allows the device to cool
down to approximately 25°C before the output is turned back on. This built-in thermal hysteresis feature is an
excellent feature, as it avoids undesirable oscillations of the thermal protection circuit. The switch continues to
cycle in this manner until the load fault is removed, resulting in a pulsed output. The FLG open-drain output is
asserted when an over-current occurs with 7-ms deglitch.
Reverse Current Protection
In a normal MOSFET switch, current can flow in reverse direction (from the output side to the input side) when the
output side voltage is higher than the input side, even when the switch is turned off. A reverse-current blocking
feature is implemented in the AP21x1 series to prevent such back currents. This circuit is activated by the
difference between the output voltage and the input voltage. When the switch is disabled, this feature blocks
reverse current flow from the output back to the input.
Special Functions:
Discharge Function
When enable is de-asserted, the discharge function is active. The output capacitor is discharged through an
internal NMOS that has a discharge resistance of 100
Ω. 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.
FLG Response
The FLG open-drain output goes active low for any of the two conditions: Over-Current or Over-Temperature. The
time from when a fault condition is encountered to when the FLG output goes low is 7-ms (TYP). 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. This 7-ms timeout is also applicable for Over-current recovery and Thermal
recovery. The AP2181D/AP2191D is designed to eliminate erroneous Over-current reporting without the need for
external components, such as an RC delay network.
Applications Information:
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 (10-
μF minimum) and output pin(s) is recommended when the output load is heavy. This precaution
also reduces power-supply transients that may cause ringing on the input. Additionally, bypassing the output with
a 0.01-
μF to 0.1-μF 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 inductive parasitics.


Similar Part No. - AP2191DFMG-7

ManufacturerPart #DatasheetDescription
logo
Diodes Incorporated
AP2191D DIODES-AP2191D Datasheet
408Kb / 17P
   1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
DS32251 Rev. 2 - 2
More results

Similar Description - AP2191DFMG-7

ManufacturerPart #DatasheetDescription
logo
Diodes Incorporated
AP2182A DIODES-AP2182A Datasheet
772Kb / 17P
   1.5A DUAL CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE
DS32193 Rev. 2 - 2
logo
Monolithic Power System...
MP62170-1 MPS-MP62170-1 Datasheet
382Kb / 12P
   3.3V/5V, Single-Channel 1.5A Current-Limited Power Distribution Switch with Output Discharge
logo
Diodes Incorporated
AP2171DM8G-13 DIODES-AP2171DM8G-13 Datasheet
602Kb / 19P
   1A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE
AP2161D DIODES-AP2161D Datasheet
543Kb / 18P
   1A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE
DS32250 Rev. 1 - 2
AP2145 DIODES-AP2145_10 Datasheet
405Kb / 13P
   0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE
DS32031 Rev. 2 - 2
AP2141D DIODES-AP2141D Datasheet
565Kb / 18P
   0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE
DS32242 Rev. 1 - 2
AP2141D_1009 DIODES-AP2141D_1009 Datasheet
504Kb / 17P
   0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE
DS32242 Rev. 2 - 2
AP2181A DIODES-AP2181A Datasheet
884Kb / 17P
   1.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
May 2018 Rev. 2 - 2
AP2181MPG-13 DIODES-AP2181MPG-13 Datasheet
438Kb / 17P
   1.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
AP2191SG-13 DIODES-AP2191SG-13 Datasheet
438Kb / 17P
   1.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com