Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

MAX4766CETA Datasheet(PDF) 9 Page - Maxim Integrated Products

Part # MAX4766CETA
Description  0.075A to 1.5A, Programmable Current-Limit Switch
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX4766CETA Datasheet(HTML) 9 Page - Maxim Integrated Products

Back Button MAX4766CETA Datasheet HTML 4Page - Maxim Integrated Products MAX4766CETA Datasheet HTML 5Page - Maxim Integrated Products MAX4766CETA Datasheet HTML 6Page - Maxim Integrated Products MAX4766CETA Datasheet HTML 7Page - Maxim Integrated Products MAX4766CETA Datasheet HTML 8Page - Maxim Integrated Products MAX4766CETA Datasheet HTML 9Page - Maxim Integrated Products MAX4766CETA Datasheet HTML 10Page - Maxim Integrated Products MAX4766CETA Datasheet HTML 11Page - Maxim Integrated Products MAX4766CETA Datasheet HTML 12Page - Maxim Integrated Products  
Zoom Inzoom in Zoom Outzoom out
 9 / 12 page
background image
0.075A to 1.5A, Programmable
Current-Limit Switch
_______________________________________________________________________________________
9
Autoretry (MAX4766A)
When the forward current-limit threshold is exceeded,
the tBLANK timer begins counting (Figure 3). The timer
resets if the overcurrent condition disappears before
tBLANK has elapsed. A retry time delay (tRETRY) starts
immediately after tBLANK has elapsed and during that
time, the switch turns off. At the end of tRETRY, the
switch turns on again. If the fault still exists, the cycle
repeats. If the fault has been removed, the switch stays
on. The autoretry feature saves system power in the
case of an overcurrent or short-circuit condition. During
tBLANK, when the switch is on, the supply current is at
the current limit. During tRETRY, when the switch is off,
the current through the switch is zero. Instead of
observing the full load current, the switch sees the
equivalent load current times duty cycle or:
With a typical tBLANK = 15ms and typical tRETRY =
150ms, the duty cycle is 10%, which results in a 90%
power savings over the switch being on the entire time.
Continuous Current Limit
In the continuous current-limit version of the MAX4766,
the output stays at the current limit until the output load
reduces. In this case, FLAG asserts as soon as there is
current limit without waiting for blanking time and
deasserts as soon as a short-circuit condition is
removed. In this current mode, if the thermal power rat-
ing of the package is exceeded, the device will go into
thermal shutdown and will not operate until the die tem-
perature has cooled.
Latch-Off
When the forward current-limit threshold is exceeded,
tBLANK timer begins counting. The timer resets if the
overcurrent condition disappears before tBLANK has
elapsed. The switch turns off and FLAG asserts if the
overcurrent condition continues beyond the blanking
time. Reset the switch by either toggling ON (Figure 2a)
or cycling the input voltage (Figure 2b).
Reverse-Current Protection
The MAX4766 features a reverse-current protection cir-
cuitry to limit the current back flow to 1µA when the out-
put voltage exceeds the input voltage by a 100mV.
During this period, the switch turns off and FLAG
asserts (MAX4766B/C) without waiting for tBLANK time to
elapse. If at this point the output voltage drops below
input +100mV, the switch turns on and FLAG deasserts
(MAX4766B/C).
Thermal Shutdown
A thermal-shutdown circuitry protects the devices from
overheating. The switch turns off and FLAG goes
(MAX4766B/C) low immediately (no fault blanking)
when the junction temperature exceeds +150°C. The
MAX4766B (latch-off) does not turn on again until ON is
cycled from high to low to high. The MAX4766A
(autoretry) and the MAX4766C (continuous) turn the
switch on again after the device temperature drops
approximately +15°C.
F
FL
LA
AG
G Indicator
FLAG is an open-drain fault indicator output and
requires an external pullup resistor to a DC supply
(usually IN). FLAG goes low when any of the following
conditions occur:
• The device is in current limit for more than the fault-
blanking period in the case of MAX4766B.
• The device is in current limit in the case of MAX4766C
(no blanking time).
• The switch is in autoretry mode.
• The OUT voltage is above the IN voltage by more
than 100mV.
• The die temperature exceeds the thermal-shutdown
temperature limit of the +15°C.
II
SUPPLY
LOAD
t
tt
BLANK
BLANK
RETRY
=
+
⎝⎜
⎠⎟
Figure 3. Autoretry Fault-Blanking Diagram
LOAD
CURRENT
SWITCH
STATUS
tBLANK
OFF
ON
tRETRY
CURRENT
LIMIT
SHORT
REMOVED
tBLANK
tBLANK


Similar Part No. - MAX4766CETA

ManufacturerPart #DatasheetDescription
logo
Maxim Integrated Produc...
MAX4760 MAXIM-MAX4760 Datasheet
703Kb / 14P
   High-Bandwidth, Quad DPDT Switches
Rev 1; 11/04
MAX4760 MAXIM-MAX4760 Datasheet
178Kb / 14P
   High-Bandwidth, Quad DPDT Switches
Rev 5; 4/09
MAX4760-MAX4761 MAXIM-MAX4760-MAX4761 Datasheet
703Kb / 14P
   High-Bandwidth, Quad DPDT Switches
Rev 1; 11/04
MAX4760A MAXIM-MAX4760A Datasheet
178Kb / 14P
   High-Bandwidth, Quad DPDT Switches
Rev 5; 4/09
MAX4760AETX+T MAXIM-MAX4760AETX+T Datasheet
178Kb / 14P
   High-Bandwidth, Quad DPDT Switches
Rev 5; 4/09
More results

Similar Description - MAX4766CETA

ManufacturerPart #DatasheetDescription
logo
Richtek Technology Corp...
RT9722 RICHTEK-RT9722 Datasheet
320Kb / 14P
   145m廓, 1.5A Power Switch with Programmable Current Limit
logo
Rohm
BD82020FVJ ROHM-BD82020FVJ Datasheet
622Kb / 24P
   1.5A Current Limit High Side Switch ICs
BD82031FVJ ROHM-BD82031FVJ Datasheet
666Kb / 24P
   1.5A Current Limit High Side Switch ICs
BD82030FVJ ROHM-BD82030FVJ Datasheet
664Kb / 24P
   1.5A Current Limit High Side Switch ICs
BD82000FVJ-LB ROHM-BD82000FVJ-LB Datasheet
532Kb / 26P
   1.5A Current Limit High Side Switch ICs
BD2061AFJ ROHM-BD2061AFJ Datasheet
1,023Kb / 26P
   1.5A Current Limit High Side Switch ICs
BD82000FVJ ROHM-BD82000FVJ_14 Datasheet
1Mb / 27P
   1.5A Current Limit High Side Switch ICs
BD82021FVJ ROHM-BD82021FVJ Datasheet
624Kb / 24P
   1.5A Current Limit High Side Switch ICs
logo
Monolithic Power System...
MP5000 MPS-MP5000 Datasheet
772Kb / 12P
   12V, 5A Programmable Current Limit Switch
MP5000A MPS-MP5000A Datasheet
487Kb / 14P
   12V, 5A Programmable Current Limit Switch
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


Datasheet Download

Go To PDF Page


Link URL




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

About Alldatasheet   |   Advertisement   |   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