參數(shù)資料
型號(hào)： MAX1898
廠商： Maxim Integrated Products, Inc.
元件分類： 數(shù)字信號(hào)處理
英文描述： Fixed-Point Digital Signal Processor 532-FCBGA
中文描述： 線性充電器，用于單節(jié)Li+電池
文件頁(yè)數(shù)： 10/12頁(yè)
文件大?。?/td> 210K
代理商： MAX1898
M
after use when charger power is available. The restart
feature can be configured in the following ways:
Floating the RSTRT pin disables restart. Once the
battery is charged and the charge timer expires,
charging can only be started by cycling input power
to IN, or by toggling EN/OK. When the restart func-
tion is disabled, battery drain after charge comple-
tion is reduced to 4μA. With the restart function
enabled, battery drain current after charge comple-
tion is 40μA.
Ground the RSTRT pin to enable the default restart
threshold of 4V for the MAX1898EUB42 and 3.9V for
the MAX1898EUB41. Once the battery is charged
and the charge timer expires, charging restarts when
the cell voltage drops to the restart-threshold voltage.
If desired, lower the restart-threshold voltage by con-
necting a resistor from RSTRT to GND. Select the
Table 2. External Transistors
resistor using the following equations:
For MAX1898EUB42:
for V
RSTRT
values between 3V and 4V.
For MAX1898EUB41:
for V
RSTRT
values between 3V and 3.9V.
Note that if CT is grounded (charge timer disabled), the
restart function is also disabled.
R
k
k
V
k
RSTRT
RSTRT
1 4
.
[
]
=
66 822
.
1
37 301
.
R
k
k
V
V
k
RSTRT
RSTRT
1 4
.
[
]
=
69 275
.
1
37 301
.
Linear Charger for Single-Cell Li+ Battery
10
______________________________________________________________________________________
V
BATT
< 2.5V
TIMEOUT/4
EXPIRES AND
V
BATT
< 2.5V
RSTRT = GND AND
V
BATT
< 4.0V (MAX1898EUB42)
V
BATT
< 3.9V (MAX1898EUB41)
PREQUALIFICATION
10% CHARGE CURRENT
LED = ON
FAST CHARGE
100% CHARGER CURRENT
LED = ON
TOP OFF
LED = OFF
SHUTDOWN
CHARGER = OFF
LED = OFF
FAULT
LED BLINKING AT 1.5Hz
DONE
(CHARGE COMPLETE)
CHARGER = OFF
LED = OFF
ASYNCHRONOUS FROM
ANYWHERE
V
IN
< 4.5V OR
V
BATT
> V
IN
V
IN
< 4.5V OR
V
BATT
> V
IN
V
> 2.5V,
3hr TIMER STARTS
TIMEOUT = 3hr
ICHARGE < 20%
OF ISET
DOTTED LINE INDICATES THE STATES THAT
ARE NOT AVAILABLE WHEN CT = 0 (TIMER DISABLED)
ICHARGE > 22%
OF ISET
TIMEOUT = 3hr
Figure 6. Charger State Diagram
EXTERNAL
TRANSISTORS
RESISTANCE
RATING
VOLTAGE LIMIT
(V)
POWER
DISSIPATION (W)
PACKAGE
COMMENTS
PMOS
Fairchild NDT454P
50m
-30
3
SOT223
—
PNP
Zetex FZT968
0.17V, V
CE(sat)
-15
3
SOT223
h
FE
= 300min
PNP
FCX717
0.32V, V
CE(sat)
-12
1
SOT89
h
FE
= 160min, 1W
rating suitable for
0.5A charge or less
相關(guān)PDF資料
PDF描述
MAX1898EUB41 Linear Charger for Single-Cell Li Battery
MAX1898EUB42 Linear Charger for Single-Cell Li Battery
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1898EUB41 功能描述:電池管理 Linear Charger for 1-Cell Li+ Battery 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
MAX1898EUB41+ 功能描述:電池管理 Linear Charger for 1-Cell Li+ Battery 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
MAX1898EUB41+T 功能描述:電池管理 Linear Charger for 1-Cell Li+ Battery 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
MAX1898EUB41-T 功能描述:電池管理 Linear Charger for 1-Cell Li+ Battery 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
MAX1898EUB42 功能描述:電池管理 Linear Charger for 1-Cell Li+ Battery 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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