How do integrated charger ICs dissipate differences in VCC and the battery voltage?PID Control implementation for charging battery really necessary?Solar Cell to DC-DC converter to Li-Ion charing module, is the DC-DC converter necessary?When to read Battery voltage and battery current during chargingPow Management IC: Li-Ion 2.8 - 4.2V; Sys Volts: 3.3VBUCK converter considerations in a battery charger,with battery as a loadCan i charge 18650 single cell using buck converter?Best battery configuration: 1s1p vs 3s1p vs 1s3p?What should be the V specs of a step down transformer for a 10amp car battery chargerIs it safe to charge single 18650 cells without temperature sensing?How does the different types of fast charge affect a lithium battery on a cellphone in terms of heat?
Identity of a supposed anonymous referee revealed through "Description" of the report
mini sub panel?
Do you take falling damage if falling from 20 feet or less while grappled by someone affected by the Cat's Grace option of the Enhance Ability spell?
What's an appropriate age to involve kids in life changing decisions?
Why doesn't a particle exert force on itself?
get unsigned long long addition carry
Is your maximum jump distance halved by grappling?
Why did Ham the Chimp push levers?
Is the tensor product (of vector spaces) commutative?
99 coins into the sacks
Gift for mentor after his thesis defense?
What's the difference between "ricochet" and "bounce"?
Employee is self-centered and affects the team negatively
Are wands in any sort of book going to be too much like Harry Potter?
I want to write a blog post building upon someone else's paper, how can I properly cite/credit them?
When an electron around an atom drops to a lower state, is 100% of the energy converted to a photon?
How to adjust Venn Diagram for A^c and A - B
Add elements inside Array conditionally in JavaScript
What predictive model to use for Gender?
Using mean length and mean weight to calculate mean BMI?
Was Mohammed the most popular first name for boys born in Berlin in 2018?
My parents are Afghan
Why is there a cap on 401k contributions?
Why is the episode called "The Last of the Starks"?
How do integrated charger ICs dissipate differences in VCC and the battery voltage?
PID Control implementation for charging battery really necessary?Solar Cell to DC-DC converter to Li-Ion charing module, is the DC-DC converter necessary?When to read Battery voltage and battery current during chargingPow Management IC: Li-Ion 2.8 - 4.2V; Sys Volts: 3.3VBUCK converter considerations in a battery charger,with battery as a loadCan i charge 18650 single cell using buck converter?Best battery configuration: 1s1p vs 3s1p vs 1s3p?What should be the V specs of a step down transformer for a 10amp car battery chargerIs it safe to charge single 18650 cells without temperature sensing?How does the different types of fast charge affect a lithium battery on a cellphone in terms of heat?
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
$begingroup$
I was looking at a couple of charging ICs (BQ2002 for instance) and some of the fast charger ICs can charge up to 2A whilst running of a 5v supply. In this case charging a empty 1v NiMH cell means that 4v * 2A ~ 8w is being dissipated by the IC? Do they use some kind of internal buck converter to step the voltage down?
integrated-circuit battery-charging
asked 5 hours ago
user1247060user1247060
105
$endgroup$
add a comment |
$begingroup$
I was looking at a couple of charging ICs (BQ2002 for instance) and some of the fast charger ICs can charge up to 2A whilst running of a 5v supply. In this case charging a empty 1v NiMH cell means that 4v * 2A ~ 8w is being dissipated by the IC? Do they use some kind of internal buck converter to step the voltage down?
integrated-circuit battery-charging
asked 5 hours ago
user1247060user1247060
105
$endgroup$
$begingroup$
I don't think those have an integrated buck converter. The IC is too small to house an inductor. I also don't see anywhere in the BQ2002 datasheet that says 2A.
$endgroup$
– Toor
5 hours ago
1
$begingroup$
A BQ2002 is a Fast-Change Management IC. It doesn't itself pass the charge current - it just controls some external component(s).
$endgroup$
– brhans
5 hours ago
$begingroup$
Read around P 18 of 93. This Power IC selection guide has all types of battery chargers not just the ones in these answers ti.com/lit/pdf/slvt145 BQ2002 is current limited to 2C and others are pulse, linear etc
$endgroup$
– Sunnyskyguy EE75
5 hours ago
add a comment |
$begingroup$
I was looking at a couple of charging ICs (BQ2002 for instance) and some of the fast charger ICs can charge up to 2A whilst running of a 5v supply. In this case charging a empty 1v NiMH cell means that 4v * 2A ~ 8w is being dissipated by the IC? Do they use some kind of internal buck converter to step the voltage down?
integrated-circuit battery-charging
asked 5 hours ago
user1247060user1247060
105
$endgroup$
I was looking at a couple of charging ICs (BQ2002 for instance) and some of the fast charger ICs can charge up to 2A whilst running of a 5v supply. In this case charging a empty 1v NiMH cell means that 4v * 2A ~ 8w is being dissipated by the IC? Do they use some kind of internal buck converter to step the voltage down?
integrated-circuit battery-charging
integrated-circuit battery-charging
asked 5 hours ago
user1247060user1247060
105
asked 5 hours ago
user1247060user1247060
105
asked 5 hours ago
user1247060user1247060
105
asked 5 hours ago
user1247060user1247060
105
asked 5 hours ago
user1247060user1247060
105
105
$begingroup$
I don't think those have an integrated buck converter. The IC is too small to house an inductor. I also don't see anywhere in the BQ2002 datasheet that says 2A.
$endgroup$
– Toor
5 hours ago
1
$begingroup$
A BQ2002 is a Fast-Change Management IC. It doesn't itself pass the charge current - it just controls some external component(s).
$endgroup$
– brhans
5 hours ago
$begingroup$
Read around P 18 of 93. This Power IC selection guide has all types of battery chargers not just the ones in these answers ti.com/lit/pdf/slvt145 BQ2002 is current limited to 2C and others are pulse, linear etc
$endgroup$
– Sunnyskyguy EE75
5 hours ago
add a comment |
$begingroup$
I don't think those have an integrated buck converter. The IC is too small to house an inductor. I also don't see anywhere in the BQ2002 datasheet that says 2A.
$endgroup$
– Toor
5 hours ago
1
$begingroup$
A BQ2002 is a Fast-Change Management IC. It doesn't itself pass the charge current - it just controls some external component(s).
$endgroup$
– brhans
5 hours ago
$begingroup$
Read around P 18 of 93. This Power IC selection guide has all types of battery chargers not just the ones in these answers ti.com/lit/pdf/slvt145 BQ2002 is current limited to 2C and others are pulse, linear etc
$endgroup$
– Sunnyskyguy EE75
5 hours ago
$begingroup$
I don't think those have an integrated buck converter. The IC is too small to house an inductor. I also don't see anywhere in the BQ2002 datasheet that says 2A.
$endgroup$
– Toor
5 hours ago
$begingroup$
I don't think those have an integrated buck converter. The IC is too small to house an inductor. I also don't see anywhere in the BQ2002 datasheet that says 2A.
$endgroup$
– Toor
5 hours ago
1
1
$begingroup$
A BQ2002 is a Fast-Change Management IC. It doesn't itself pass the charge current - it just controls some external component(s).
$endgroup$
– brhans
5 hours ago
$begingroup$
A BQ2002 is a Fast-Change Management IC. It doesn't itself pass the charge current - it just controls some external component(s).
$endgroup$
– brhans
5 hours ago
$begingroup$
Read around P 18 of 93. This Power IC selection guide has all types of battery chargers not just the ones in these answers ti.com/lit/pdf/slvt145 BQ2002 is current limited to 2C and others are pulse, linear etc
$endgroup$
– Sunnyskyguy EE75
5 hours ago
$begingroup$
Read around P 18 of 93. This Power IC selection guide has all types of battery chargers not just the ones in these answers ti.com/lit/pdf/slvt145 BQ2002 is current limited to 2C and others are pulse, linear etc
$endgroup$
– Sunnyskyguy EE75
5 hours ago
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
BQ2002 and similar ICs don't actually see the charging current path through them. They are just controllers, they don't regulate by themselves. They have an output (the CC pin) which is used to indirectly control the external, high-current passing element.
You can have a look to a reference design provided by TI. The CC output controls a LM317 which is used as the regulating element (where the thermal considerations indeed apply).
This way, you can have a much greater flexibility in your design (use whatever regulator you want, linear or switched, with whatever specs you need for your specific case).
answered 5 hours ago
dimdim
13.6k22569
$endgroup$
$begingroup$
Thank you for the clear explanation
$endgroup$
– user1247060
1 hour ago
add a comment |
Your Answer
StackExchange.ifUsing("editor", function ()
return StackExchange.using("schematics", function ()
StackExchange.schematics.init();
);
, "cicuitlab");
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "135"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2felectronics.stackexchange.com%2fquestions%2f437390%2fhow-do-integrated-charger-ics-dissipate-differences-in-vcc-and-the-battery-volta%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
BQ2002 and similar ICs don't actually see the charging current path through them. They are just controllers, they don't regulate by themselves. They have an output (the CC pin) which is used to indirectly control the external, high-current passing element.
You can have a look to a reference design provided by TI. The CC output controls a LM317 which is used as the regulating element (where the thermal considerations indeed apply).
This way, you can have a much greater flexibility in your design (use whatever regulator you want, linear or switched, with whatever specs you need for your specific case).
answered 5 hours ago
dimdim
13.6k22569
$endgroup$
$begingroup$
Thank you for the clear explanation
$endgroup$
– user1247060
1 hour ago
add a comment |
$begingroup$
BQ2002 and similar ICs don't actually see the charging current path through them. They are just controllers, they don't regulate by themselves. They have an output (the CC pin) which is used to indirectly control the external, high-current passing element.
You can have a look to a reference design provided by TI. The CC output controls a LM317 which is used as the regulating element (where the thermal considerations indeed apply).
This way, you can have a much greater flexibility in your design (use whatever regulator you want, linear or switched, with whatever specs you need for your specific case).
answered 5 hours ago
dimdim
13.6k22569
$endgroup$
$begingroup$
Thank you for the clear explanation
$endgroup$
– user1247060
1 hour ago
add a comment |
$begingroup$
BQ2002 and similar ICs don't actually see the charging current path through them. They are just controllers, they don't regulate by themselves. They have an output (the CC pin) which is used to indirectly control the external, high-current passing element.
You can have a look to a reference design provided by TI. The CC output controls a LM317 which is used as the regulating element (where the thermal considerations indeed apply).
This way, you can have a much greater flexibility in your design (use whatever regulator you want, linear or switched, with whatever specs you need for your specific case).
answered 5 hours ago
dimdim
13.6k22569
$endgroup$
BQ2002 and similar ICs don't actually see the charging current path through them. They are just controllers, they don't regulate by themselves. They have an output (the CC pin) which is used to indirectly control the external, high-current passing element.
You can have a look to a reference design provided by TI. The CC output controls a LM317 which is used as the regulating element (where the thermal considerations indeed apply).
This way, you can have a much greater flexibility in your design (use whatever regulator you want, linear or switched, with whatever specs you need for your specific case).
answered 5 hours ago
dimdim
13.6k22569
answered 5 hours ago
dimdim
13.6k22569
answered 5 hours ago
dimdim
13.6k22569
answered 5 hours ago
dimdim
13.6k22569
13.6k22569
$begingroup$
Thank you for the clear explanation
$endgroup$
– user1247060
1 hour ago
add a comment |
$begingroup$
Thank you for the clear explanation
$endgroup$
– user1247060
1 hour ago
$begingroup$
Thank you for the clear explanation
$endgroup$
– user1247060
1 hour ago
$begingroup$
Thank you for the clear explanation
$endgroup$
– user1247060
1 hour ago
add a comment |
Thanks for contributing an answer to Electrical Engineering Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2felectronics.stackexchange.com%2fquestions%2f437390%2fhow-do-integrated-charger-ics-dissipate-differences-in-vcc-and-the-battery-volta%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
$begingroup$
I don't think those have an integrated buck converter. The IC is too small to house an inductor. I also don't see anywhere in the BQ2002 datasheet that says 2A.
$endgroup$
– Toor
5 hours ago
1
$begingroup$
A BQ2002 is a Fast-Change Management IC. It doesn't itself pass the charge current - it just controls some external component(s).
$endgroup$
– brhans
5 hours ago
$begingroup$
Read around P 18 of 93. This Power IC selection guide has all types of battery chargers not just the ones in these answers ti.com/lit/pdf/slvt145 BQ2002 is current limited to 2C and others are pulse, linear etc
$endgroup$
– Sunnyskyguy EE75
5 hours ago