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參數資料
| 型號： | MAX1879 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Simple, Efficient, 1-Cell Li+ Pulse Charger |
| 中文描述： | 簡單、高效率、1節(jié)Li+電池脈沖充電器 |
| 文件頁數： | 5/11頁 |
| 文件大?。?/td> | 198K |
| 代理商： | MAX1879 |
M
Simple, Efficient, 1-Cell Li+ Pulse Charger
_______________________________________________________________________________________
5
M
0.980
0.985
0.995
0.990
1.010
1.015
1.005
1.000
1.020
N
-40
0
TEMPERATURE (
°
C)
20
-20
40
60
80
NORMALIZED TIMER PERIOD
vs. AMBIENT TEMPERATURE
NORMALIZED TO +25
°
C
0.9970
0.9985
0.9980
0.9975
0.9995
0.9990
1.0015
1.0010
1.0005
1.0000
1.0020
-40
-20
0
20
40
60
80
M
TEMPERATURE (
°
C)
N
NORMALIZED BATTERY REGULATION
VOLTAGE vs. TEMPERATURE
NORMALIZED TO +25
°
C
7.0
7.6
7.4
7.2
7.8
8.0
8.2
8.4
8.6
8.8
9.0
5
10
15
20
25
M
V
IN
(V)
P
PRECHARGE CURRENT
vs. INPUT VOLTAGE
V
BATT
= 0
V
BATT
= 2V
Typical Operating Characteristics
(V
IN
=
CHG
= +10V, V
BATT
= +4.2V, THERM = 10k
to GND, T
A
= +25
°
C, unless otherwise noted.)
Pin Description
PIN
NAME
FUNCTION
1
IN
Input Voltage from Current-Limited Voltage Source (+22V max). Bypass to GND with a 0.1μF capacitor.
2
GATE
Gate Drive for External PMOS Pass Element. The PMOS device should have a V
GS
threshold less than
2.5V. See
Selecting External Components
.
3
CHG
Charge Status Indication. A
CHG
low indicates that the MAX1879 is charging a battery.
CHG
goes high
when the on/off duty cycle falls to 1/8, indicating that the battery is charged to approximately 95% of full
capacity.
CHG
is an open-drain current-limited N-channel MOSFET suitable for directly driving an LED.
Connect a pullup resistor to the logic supply to generate a logic-level signal.
CHG
blinks at 2Hz during the
Prequalification state (2.2V < V
BATT
< 2.5V) and during a temperature fault.
4
TSEL
Minimum ON/OFF Pulse Width Selection (Table 2)
5
ADJ
Battery Regulation Voltage Adjustment. Bypass to GND with a 1000pF capacitor. Connect a resistor from
ADJ to GND to reduce the nominal +4.200V regulation set point. See
Adjusting the Battery Regulation
Voltage
.
6
GND
Ground. See
Layout Guidelines
for information on system grounding. Connect the battery
’
s negative
terminal to GND.
7
THERM
Thermistor Temperature-Sensor Input. Connect an NTC thermistor (10k
at +25
°
C) from THERM to GND to
allow prequalification of the cell temperature for fast-charge. Replace the thermistor with a 10k
resistor if
temperature sensing is not required.
8
BATT
Cell Voltage Monitor Input, Precharge Current Output, and MAX1879 Power Source. Connect BATT to the
positive terminal of a single Li+ cell. Bypass BATT with a capacitor to ground (1.5μF per amp of charge
current).
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX1879EUA | 功能描述:電池管理 1-Cell Li+ Pulse 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 |
| MAX1879EUA+ | 功能描述:電池管理 1-Cell Li+ Pulse 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 |
| MAX1879EUA+T | 功能描述:電池管理 1-Cell Li+ Pulse 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 |
| MAX1879EUA-T | 功能描述:電池管理 1-Cell Li+ Pulse 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 |
| MAX1879EVKIT | 制造商:Maxim Integrated Products 功能描述:SMALLEST, SIMPLE 1-CELL LI- PULSE CHARGER WIT - Bulk |
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