поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

UC2909MDWREP датащи(PDF) 11 Page - Texas Instruments

Click here to check the latest version.
номер детали UC2909MDWREP
подробное описание детали  SWITCHMODE LEAD-ACID BATTERY CHARGER
Download  21 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

UC2909MDWREP датащи(HTML) 11 Page - Texas Instruments

Back Button UC2909MDWREP Datasheet HTML 7Page - Texas Instruments UC2909MDWREP Datasheet HTML 8Page - Texas Instruments UC2909MDWREP Datasheet HTML 9Page - Texas Instruments UC2909MDWREP Datasheet HTML 10Page - Texas Instruments UC2909MDWREP Datasheet HTML 11Page - Texas Instruments UC2909MDWREP Datasheet HTML 12Page - Texas Instruments UC2909MDWREP Datasheet HTML 13Page - Texas Instruments UC2909MDWREP Datasheet HTML 14Page - Texas Instruments UC2909MDWREP Datasheet HTML 15Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 21 page
background image
RG1
RG2
¾ =
5 · V
RS
¾
VLOGIC CA-
-
=
5 · V
RS
¾
5
- 2.3
V
V
=
5 · V
RS
¾
2.7
V =
I
RS
1.852 ·
·
BULK
ITC = ¾
I
RG
TRCK_CONTROL ·
1
RS · 5
V
= V
OC
REF
(
) ·
(
1 +
2 +
3
RS
RS
RS
RS4)
¾
(
3
RS
RS4)
UC2909-EP
www.ti.com
SLUSA72 – JULY 2010
Control Loop
Current Sense Amplifier
This amplifier measures the voltage across the sense resistor RS with a fixed gain of five and an offset voltage of
2.3 V. This voltage is proportional to the battery current. The most positive voltage end of RS is connected to
CSensuring the correct polarity going into the PWM comparator.
CSO = 2.3 V when there is zero battery current.
RS is chosen by dividing 350 mV by the maximum allowable load current. A smaller value for RS can be chosen
to reduce power dissipation.
Maximum charge current, Ibulk, is set by knowing the maximum voltage error amplifier output, VOH = 5 V, the
maximum allowable drop across RS, and setting the resistors RG1 and RG2 such that:
(4)
The maximum allowable drop across RS is specified to limit the maximum swing at CSO to approximately 2 V to
keep the CSO amplifier output from saturating.
No charge/load current: VCSO = 2.3 V
Max charge/load current: Vmax(CSO) = 2.3 V - 2 V = 0.3 V
Voltage Error Amplifier
The voltage error amplifier (VEA) senses the battery voltage and compares it to the 2.3-V - 3.9-mV/°C thermistor
generated reference. Its output becomes the current command signal and is summed with the current sense
amplifier output. A 5-V voltage error amplifier upper clamp limits maximum load current. During the trickle charge
state, the voltage amplifier output is opened (high impedance output) by the charge enable comparator. A trickle
bias current is summed into the CA- input which sets the maximum trickle charge current.
The VEA, VOH = 5 V clamp saturates the voltage loop and consequently limits the charge current as stated in
Equation 4.
During the trickle bias state the maximum allowable charge current (ITC) is similarly determined:
(5)
ITRCK_CONTROL is the fixed control current into CA-. ITRCK_CONTROL is 10 µA when RSET = 11.5 KΩ. See RSET pin
description for equation.
Current Error Amplifier
The current error amplifier (CA) compares the output of the current sense amplifier to the output of the voltage
error amplifier. The output of the CA forces a PWM duty cycle which results in the correct average battery
current. With integral compensation, the CA will have a very high DC current gain, resulting in effectively no
average DC current error. For stability purposes, the high frequency gain of the CA must be designed such that
the magnitude of the down slope of the CA output signal is less than or equal to the magnitude of the up slope of
the PWM ramp.
Charge Algorithm
Trickle Charge State
STAT0 = STAT1 = STATLV = logic 0
When CHGNB is less than VREF (2.3 V - 3.9 mV/°C), STATLV is forced low. This decreases the sense voltage
divider ratio, forcing the battery to overcharge (VOC).
(6)
Copyright © 2010, Texas Instruments Incorporated
Submit Documentation Feedback
11
Product Folder Link(s): UC2909-EP


Аналогичный номер детали - UC2909MDWREP

производительномер деталидатащиподробное описание детали
logo
Texas Instruments
UC2909MDWREP TI1-UC2909MDWREP Datasheet
716Kb / 18P
[Old version datasheet]   SWITCHMODE LEAD-ACID BATTERY CHARGER
More results

Аналогичное описание - UC2909MDWREP

производительномер деталидатащиподробное описание детали
logo
Texas Instruments
UC2909 TI1-UC2909_13 Datasheet
748Kb / 14P
[Old version datasheet]   Switchmode Lead-Acid Battery Charger
UC2909-EP TI-UC2909-EP_15 Datasheet
968Kb / 20P
[Old version datasheet]   SWITCHMODE LEAD-ACID BATTERY CHARGER
UC3909Q TI-UC3909Q Datasheet
748Kb / 14P
[Old version datasheet]   Switchmode Lead-Acid Battery Charger
UC2909 TI-UC2909 Datasheet
401Kb / 10P
[Old version datasheet]   Switchmode Lead-Acid Battery Charger
UC2909-EP TI1-UC2909-EP Datasheet
716Kb / 18P
[Old version datasheet]   SWITCHMODE LEAD-ACID BATTERY CHARGER
logo
CUI INC
DTB120150UC CUI-DTB120150UC Datasheet
1Mb / 6P
   LEAD ACID BATTERY CHARGER
logo
Kasin Electronics Corpo...
KA35S281 KASIN-KA35S281 Datasheet
1Mb / 19P
   Lead-Acid Battery Charger
logo
Texas Instruments
UC3906N TI-UC3906N Datasheet
4Mb / 17P
[Old version datasheet]   Sealed Lead-Acid Battery Charger
UC2906 TI-UC2906 Datasheet
568Kb / 8P
[Old version datasheet]   Sealed Lead-Acid Battery Charger
logo
Bothhand USA, LP.
EA1046 BOTHHAND-EA1046 Datasheet
40Kb / 2P
   12V Lead-Acid 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 21


датащи скачать

Go To PDF Page


ссылки URL




Конфиденциальность
ALLDATASHEETRU.COM
Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   обмен ссыками   |   поиск по производителю
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