Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

LTC4060 Datasheet(PDF) 11 Page - Linear Integrated Systems

Part # LTC4060
Description  Standalone Linear NiMH/NiCd Fast Battery Charger
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  LINEAR [Linear Integrated Systems]
Direct Link  http://www.linearsystems.com
Logo LINEAR - Linear Integrated Systems

LTC4060 Datasheet(HTML) 11 Page - Linear Integrated Systems

Back Button LTC4060 Datasheet HTML 7Page - Linear Integrated Systems LTC4060 Datasheet HTML 8Page - Linear Integrated Systems LTC4060 Datasheet HTML 9Page - Linear Integrated Systems LTC4060 Datasheet HTML 10Page - Linear Integrated Systems LTC4060 Datasheet HTML 11Page - Linear Integrated Systems LTC4060 Datasheet HTML 12Page - Linear Integrated Systems LTC4060 Datasheet HTML 13Page - Linear Integrated Systems LTC4060 Datasheet HTML 14Page - Linear Integrated Systems LTC4060 Datasheet HTML 15Page - Linear Integrated Systems Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 20 page
background image
11
LTC4060
4060f
OPERATIO
charging begins at the maximum current set by the
external programming resistor connected between the
PROG pin and GND.
If an external thermistor indicates sensed temperature is
beyond a range of 5°C to 55°C charging is suspended, the
charge timer is paused and the CHRG status output
remains low. Normal charging resumes from the previous
state when the sensed temperature rises above 5°C or falls
below 45°C. Voltage-based termination (–∆V) is then
reset and immediately enabled. If voltage-based termina-
tion was imminent when the temperature limits were
exceeded, charge termination will occur.
Charge Termination
Once fast charge begins and after an initial battery voltage
stabilization hold-off period shown in Table 1, voltage-
based termination (–∆V) is enabled. This period is used to
prevent falsely terminating on a –∆V event that can occur
almost immediately after initiating charging on some
heavily discharged or stored batteries. However, if VCELL
was measured to be above 1.3V (VIDT) immediately prior
to the precharge cycle, then a mostly charged battery is
assumed and voltage-based termination (–∆V) is enabled
without delay.
An internal 1.5mV resolution A/D converter measures the
cell voltage after each battery voltage sampling interval
indicated in Table 1. The peak cell voltage is stored and
compared to the current cell voltage. When the cell voltage
has dropped by at least VMDV (magnitude selected by the
CHEM pin) from the peak for four consecutive battery
voltage sampling intervals, charging is terminated.
Back-up termination is provided by the charge time limiter,
whose time limit is indicated in Table 1, and by a battery
overvoltage detector. Once terminated by back-up termi-
nation, charge qualification can be reinitiated only by remov-
ing and replacing the battery or toggling the SHDN pin low
to high or removing and reapplying power to the charger.
Automatic Recharge
Once charging is complete, the optional programmable
automatic recharge state can be entered. This state, if
enabled, will automatically restart the charger from the
charge qualification state without user intervention when-
ever the battery cell voltage drops below a set level. With
the advent of low memory effect NiMH and improved NiCd
cells an automatic recharge feature is practical and elimi-
nates the need for very slow trickle charging.
The CHRG status output is high impedance in the auto-
matic recharge state until charging begins. If the VCELL
voltage drops below the voltage set on the ARCT pin for at
least the automatic recharge entry delay time as shown in
Table 1, the charge qualification state is entered and
charging will begin anew in fast charge. An easy way of
setting the voltage on the ARCT pin is by using two series
current programming resistors and connecting their com-
mon to the ARCT pin as shown in Figure 2. The PROG pin
will provide a constant 1.5V (VPROG). The programmable
voltage range of the ARCT pin is approximately 0.8V to
1.6V. A preprogrammed recharge threshold of 1.3V (VARDT)
is selected when the ARCT pin is connected to VCC
(VARDEF). Automatic recharge is disabled when the ARCT
pin is connected to ground (VARDIS).
Pause
After charging is initiated, the PAUSE pin may be used to
pause operation at any time. Whenever the voltage on the
PAUSE pin is a logic high, the charge timer and all other
timers pause, charging is stopped and the fast charge ter-
mination algorithm is inhibited. The CHRG status output
remains at GND. If voltage-based termination was immi-
nent before pause, charge termination will occur. Otherwise,
when pause ends, the charge timer and all other timers
resume timing, charging restarts and voltage-based termi-
nation (–∆V) is reset and immediately enabled. If the bat-
tery is removed while the PAUSE pin is a logic high, then
battery removal is detected and shutdown is entered. If the
battery is replaced while the PAUSE pin is a logic high, it
will not be detected until pause is turned off.
For pause periods or a series of periods where the battery
capacity could be significantly depleted, consider using
shutdown instead of pause to avoid having the safety timer
expire before the battery can be fully charged. Shutdown
resets the safety timer.


Similar Part No. - LTC4060

ManufacturerPart #DatasheetDescription
logo
Linear Technology
LTC4060 LINER-LTC4060 Datasheet
193Kb / 20P
   Standalone Linear NiMH/NiCd Fast Battery Charger
LTC4060 LINER-LTC4060_15 Datasheet
198Kb / 20P
   Standalone Linear NiMH/NiCd Fast Battery Charger
More results

Similar Description - LTC4060

ManufacturerPart #DatasheetDescription
logo
Linear Technology
LTC4060 LINER-LTC4060_15 Datasheet
198Kb / 20P
   Standalone Linear NiMH/NiCd Fast Battery Charger
LTC4060 LINER-LTC4060 Datasheet
193Kb / 20P
   Standalone Linear NiMH/NiCd Fast Battery Charger
logo
Maxim Integrated Produc...
MAX712 MAXIM-MAX712_02 Datasheet
777Kb / 17P
   NiCd/NiMH Battery Fast-Charge Controllers
Rev 5; 4/02
MAX712 MAXIM-MAX712_08 Datasheet
229Kb / 17P
   NiCd/NiMH Battery Fast-Charge Controllers
Rev 6; 12/08
MAX2003 MAXIM-MAX2003 Datasheet
211Kb / 20P
   NiCd/NiMH Battery Fast-Charge Controllers
MAX712 MAXIM-MAX712_V01 Datasheet
264Kb / 17P
   NiCd/NiMH Battery Fast-Charge Controllers
2013
MAX712 MAXIM-MAX712 Datasheet
168Kb / 18P
   NiCd/NiMH Battery Fast-Charge Controllers
Rev 3; 1/97
logo
Seaward Electronics Inc...
SE9017_0912 SEAWARD-SE9017_0912 Datasheet
409Kb / 11P
   Standalone Linear Lithium Battery Charger
SE9020 SEAWARD-SE9020_10 Datasheet
362Kb / 9P
   Standalone Linear Lithium Battery Charger
logo
E-CMOS Corporation
EC49017 E-CMOS-EC49017 Datasheet
387Kb / 11P
   Standalone Linear Lithium Battery Charger
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


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