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參數資料
| 型號： | MAX1873REEE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Simple Current-Limited Switch-Mode Li Charger Controller |
| 中文描述： | 0.05 A BATTERY CHARGE CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, QSOP-16 |
| 文件頁數： | 9/14頁 |
| 文件大小： | 206K |
| 代理商： | MAX1873REEE |
Detailed Description
The MAX1873 includes all of the functions necessary to
charge 2-, 3-, or 4-series cell lithium-ion (Li+) battery
packs. It includes a high-efficiency step-down DC-DC
converter that controls charging voltage and current. It
also features input source current limiting so that an AC
adapter that supplies less than the total system current
in addition to charging current can be used without fear
of overload.
The DC-DC converter uses an external P-channel MOS-
FET switch, inductor, and diode to convert the input volt-
age to charging current or charging voltage. The typical
application circuit is shown in Figure 1. Charging current
is set by R
CSB
, while the battery voltage is measured at
BATT. The battery regulation voltage limit is nominally
set to 8.4V for the R version (2-cells), 12.6V for the S
version (3-cells), and 16.8V for the T version (4-cells),
but it can also be adjusted to other voltages for differ-
ent Li+ chemistries.
Voltage Regulator
Li+ batteries require a high-accuracy voltage limit while
charging. The battery regulation voltage is nominally
set to 4.2V per cell and can be adjusted ±5.25% by
setting the voltage at VADJ between REF and ground.
By limiting the adjust range of the regulation voltage, an
overall voltage accuracy of better than ±0.75% is main-
tained while using 1% resistors.
An internal error amplifier maintains voltage regulation
to within ±0.75%. The amplifier is compensated at CCV
(see Figure 1). Individual compensation of the voltage
regulation and current regulation loops allows for opti-
mal compensation of each. A typical CCV compensa-
tion network is shown in Figure 1 and will suffice for
most designs.
M
Simple Current-Limited Switch-Mode
Li+ Charger Controller
_______________________________________________________________________________________
9
MAX1873
GND
VADJ
REF
ICHG/EN
IOUT
DCIN
VH
VL
CSSP
CSSN
VIN 17V TO 28V
(9V MIN FOR 2- CELLS)
4V OUT PER
200mV ON R
CSB
EXT
BATT
CSB
CCI
CCS
CCV
D1
MBR5340
C
VL
2.2
μ
F
R
P
4.7
C
P
0.01
μ
F
R
N
4.7
C
N
0.01
μ
F
P
R
CSS
0.033
D2
MBR5340
SYSTEM
LOAD
C
L
47
μ
F
C
BATT
68
μ
F
LI+
BATTERY
(2- TO 4-CELLS)
R
CSB
0.068
L1
10
μ
H
R1
R2
C
REF
1
μ
F
C
CCVP
1nF
R
CCV
10k
C
CCVS
0.1
F
C
CCS
47nF
C
47nF
N
DISABLE
C
DCIN
0.22
μ
F
C
VH
0.22
μ
F
100k
Figure 1. Typical Application Circuit
相關PDF資料 |
PDF描述 |
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| MAX1873TEEE | Simple Current-Limited Switch-Mode Li Charger Controller |
| MAX1874 | MAX1874 Evaluation Kit |
| MAX1874ETE | Dual-Input, USB/AC Adapter, 1-Cell Li+ Charger with OVP and Thermal Regulation |
| MAX1874EVKIT | MAX1874 Evaluation Kit |
| MAX1875 | Dual 180∑ Out-of-Phase PWM Step- Down Controllers with POR |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX1873REEE+ | 功能描述:電池管理 Switch-Mode Li+ Charger RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX1873REEE+T | 功能描述:電池管理 Switch-Mode Li+ Charger RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX1873REEE-T | 功能描述:電池管理 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX1873SEEE | 功能描述:電池管理 Switch-Mode Li+ Charger RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX1873SEEE+ | 功能描述:電池管理 Switch-Mode Li+ Charger RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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