データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

MAX8725ETI データシート(PDF) 22 Page - Maxim Integrated Products

部品番号 MAX8725ETI
部品情報  Multichemistry Battery Charger with Automatic System Power Selector
Download  30 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  MAXIM [Maxim Integrated Products]
ホームページ  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX8725ETI データシート(HTML) 22 Page - Maxim Integrated Products

Back Button MAX8725ETI Datasheet HTML 18Page - Maxim Integrated Products MAX8725ETI Datasheet HTML 19Page - Maxim Integrated Products MAX8725ETI Datasheet HTML 20Page - Maxim Integrated Products MAX8725ETI Datasheet HTML 21Page - Maxim Integrated Products MAX8725ETI Datasheet HTML 22Page - Maxim Integrated Products MAX8725ETI Datasheet HTML 23Page - Maxim Integrated Products MAX8725ETI Datasheet HTML 24Page - Maxim Integrated Products MAX8725ETI Datasheet HTML 25Page - Maxim Integrated Products MAX8725ETI Datasheet HTML 26Page - Maxim Integrated Products Next Button
Zoom Inzoom in Zoom Outzoom out
 22 / 30 page
background image
Multichemistry Battery Chargers with Automatic
System Power Selector
22
______________________________________________________________________________________
In discontinuous mode, a new cycle is not started until
the LVC voltage rises above 0.15V. Discontinuous-
mode operation can occur during conditioning charge
of overdischarged battery packs, when the charge cur-
rent has been reduced sufficiently by the CCS control
loop, or when the charger is in constant voltage mode
with a nearly full battery pack.
Compensation
The charge voltage, charge current, and input current-
limit regulation loops are compensated separately and
independently at the CCV, CCI, and CCS pins.
CCV Loop Compensation
The simplified schematic in Figure 5 is sufficient to
describe the operation of the MAX1909/MAX8725 when
the voltage loop (CCV) is in control. The required com-
pensation network is a pole-zero pair formed with CCV
and RCV. The pole is necessary to roll off the voltage
loop’s response at low frequency. The zero is necessary
to compensate the pole formed by the output capacitor
and the load. RESR is the equivalent series resistance
(ESR) of the charger output capacitor (COUT). RL is the
equivalent charger output load, where RL = ∆VBATT /
∆ICHG. The equivalent output impedance of the GMV
amplifier, ROGMV, is greater than 10MΩ. The voltage
loop transconductance (GMV = ICCV / VBATT) depends
on the MODE input, which determines the number of
cells. GMV = 0.125mA/mV for 4 cells and GMV =
0.167mA/mV for 3 cells. The DC-DC converter transcon-
ductance is dependent upon the charge current-sense
resistor RS2:
where ACSI = 20, and RS2 = 0.015Ω in the Typical
Operating Circuits (Figures 1 and 2), so GMOUT =
3.33A/V.
The loop transfer function is:
LTF
GM
RsC
R
sC
R
R
sC
R
GsC
R
OUT
OGMV
CV
CV
CV
OGMV
L
OUT
L
MV
OUT
ESR
×+
×
()
()
×
()
()
1
1
1
1
GM
ARS
OUT
CSI
=
×
1
2
CCV
COUT
RCV
RL
RESR
ROGMV
CCV
BATT
GMV
REF
GMOUT
Figure 5. CCV Loop Diagram
NO.
NAME
CALCULATION
DESCRIPTION
1
CCV pole
Lowest frequency pole created by CCV and GMV’s finite output
resistance. Since ROGMV is very large and not well controlled, the
exact value for the pole frequency is also not well controlled
(ROGMV > 10MΩ).
2
CCV zero
Voltage-loop compensation zero. If this zero is at the same
frequency or lower than the output pole fP_OUT, then the loop
transfer function approximates a single pole response near the
crossover frequency. Choose CCV to place this zero at least one
decade below crossover to ensure adequate phase margin.
3
Output pole
Output pole formed with the effective load resistance RL and the
output capacitance COUT. RL influences the DC gain but does not
affect the stability of the system or the crossover frequency.
4
Output zero
Output ESR Zero. This zero can keep the loop from crossing unity
gain if fZ_OUT is less than the desired crossover frequency;
therefore, choose a capacitor with an ESR zero greater than the
crossover frequency.
Table 1. Poles and Zeros of the Voltage-Loop Transfer Function
f
RC
PCV
OGMV
CV
_
=
×
1
f
RC
ZCV
CV
CV
_
=
×
1
f
RC
P OUT
L
OUT
_
=
×
1
f
RC
Z OUT
ESR
OUT
_
=
×
1


同様の部品番号 - MAX8725ETI

メーカー部品番号データシート部品情報
logo
Maxim Integrated Produc...
MAX8725ETI MAXIM-MAX8725ETI Datasheet
420Kb / 31P
   Multichemistry Battery Chargers with Automatic System Power Selector
2015
MAX8725ETI++ MAXIM-MAX8725ETI+ Datasheet
420Kb / 31P
   Multichemistry Battery Chargers with Automatic System Power Selector
2015
More results

同様の説明 - MAX8725ETI

メーカー部品番号データシート部品情報
logo
Maxim Integrated Produc...
MAX1909 MAXIM-MAX1909_V01 Datasheet
420Kb / 31P
   Multichemistry Battery Chargers with Automatic System Power Selector
2015
logo
Texas Instruments
BQ24702 TI-BQ24702 Datasheet
521Kb / 32P
[Old version datasheet]   MULTICHEMISTRY BATTERY CHARGER CONTROLLER AND SYSTEM POWER SELECTOR
logo
Maxim Integrated Produc...
MAX846A MAXIM-MAX846A Datasheet
106Kb / 12P
   Cost-Saving Multichemistry Battery-Charger System
Rev 0; 9/96
logo
Analog Devices
DC2039A AD-DC2039A Datasheet
4Mb / 32P
   Multichemistry Buck Battery Charger with Digital Telemetry System
logo
Linear Technology
LTC4015 LINER-LTC4015_15 Datasheet
1Mb / 76P
   Multichemistry Buck Battery Charger Controller with Digital Telemetry System
LTC4015 LINER-LTC4015 Datasheet
1Mb / 76P
   Multichemistry Buck Battery Charger Controller with Digital Telemetry System
logo
Texas Instruments
BQ24702 TI1-BQ24702_16 Datasheet
886Kb / 37P
[Old version datasheet]   MULTICHEMISTRY BATTERY CHARGER CONTROLLER
logo
Maxim Integrated Produc...
MAX8713 MAXIM-MAX8713 Datasheet
1Mb / 25P
   Simplified Multichemistry SMBus Battery Charger
Rev 0; 11/04
logo
Intersil Corporation
ISL6256HRZ INTERSIL-ISL6256HRZ Datasheet
837Kb / 26P
   Highly Integrated Battery Charger with Automatic Power Source Selector for Notebook Computers
September 14, 2010
logo
Renesas Technology Corp
ISL6256 RENESAS-ISL6256 Datasheet
1Mb / 26P
   Highly Integrated Battery Charger with Automatic Power Source Selector for Notebook Computers
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
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