- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375222 > AAT3680ITP-8.4-T1 (Advanced Analogic Technologies, Inc.) Lithium-Ion Linear Battery Charge Controller PDF資料下載
參數(shù)資料
| 型號： | AAT3680ITP-8.4-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | Lithium-Ion Linear Battery Charge Controller |
| 中文描述： | 鋰離子線性電池充電控制器 |
| 文件頁數(shù)： | 11/18頁 |
| 文件大?。?/td> | 265K |
| 代理商： | AAT3680ITP-8.4-T1 |
AAT3680
Lithium-Ion Linear Battery Charge Controller
3680.2003.4.0.91
11
P
D
= (V
P(MAX)
- V
CS
- V
D
- V
MIN
) · I
CHARGE(REG)
P
D
= (5.5V - 0.1V - 0.4V - 3.1V) · 750mA
P
D
= 1.4W
2. The next step is to determine which size package
is needed to keep the junction temperature below its
rated value, T
J(MAX)
. Using this value, and the maxi-
mum ambient temperature inside the system T
A(MAX)
,
calculate the thermal resistance R
θ
JA
required:
R
θ
JA
= (T
J(MAX)
- T
A(MAX)
)
P
D
R
θ
JA
= (150 - 40)
1.4
R
θ
JA
= 79°C/W
It is recommended to choose a package with a lower
R
θ
JA
than the number calculated above. A SOT223
package would be an acceptable choice, as it has an
R
θ
JA
of 62.5°C/W when mounted to a PCB with ade-
quately sized copper pad soldered to the heat tab.
3. Choose a drain-source (V
DS
) voltage rating
greater than the input voltage. In this example, V
P
is 5.0V, so a 12V device is acceptable.
4. Choose a MOSFET with a drain current rating at
least 50% greater than the programmed
I
CHARGE(REG)
value. In this example we would
select a device with at least 1.125A rating.
5. Calculate the required threshold voltage to deliv-
er I
CHARGE(REG)
:
V
GS
= (V
CS
+ V
OL@DRV
) - V
P(MIN)
V
GS
= (0.1V + 0.1V) - 4.5V
V
GS
= -4.3V
where V
GS
is the available gate to source voltage pro-
vided by the AAT3680, V
CS
is the voltage across the
sense resistor, V
OL@DRV
is the rated low voltage at the
DRV pin, and V
P(MIN)
is the worst case input voltage
(assuming 10% tolerance on the 5V supply). Choose
a MOSFET device with sufficiently low V
GS(TH)
so the
device will conduct the desired I
CHARGE(REG)
.
6. Calculate the worst case maximum allowable
R
DS(ON)
at worst case V
GS
voltage:
R
DS(ON)
= (V
P(MIN)
- V
CS(MAX)
- V
BAT(MAX)
)
I
CHARGE(REG)
R
DS(ON)
= (4.5V - 0.11V - 4.242V)
0.75A
R
DS(ON)
= 197m
Select a P-Channel Power MOSFET with R
DS(ON)
lower than 197m
at V
GS
= -4.3V.
In summary, select a P-Channel MOSFETwith ratings
V
DS
≥
12V, R
θ
JA
≤
79°C/W and R
DS(ON)
≥
197m
at
V
GS
= -4.3V in a SOT223 (or better thermal) package.
Figure 5: Typical Applications Schematic Using P-Channel Power MOSFET
Q1
RFD10P03L
AAT3680
C2
10
μ
F
C1
4.7
μ
F
R2
1k
R
SENSE
0.2
R1
1k
R4
100k
BATT+
BATT-
TEMP
RT1
RT2
VP
Battery
Pack
DRV
CSI
VP
VP
VSS
STAT
TS
BAT
T2X
D1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT3682 | Lithium-Ion/Polymer Linear Battery Charger |
| AAT3682ISN-4.2-T1 | Lithium-Ion/Polymer Linear Battery Charger |
| AAT4250IGV-T1 | Slew Rate Controlled Load Switch |
| AAT4250 | Slew Rate Controlled Load Switch |
| AAT4250IJS-T1 | Slew Rate Controlled Load Switch |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3681AIJS-4.1-5-T1 | 功能描述:電池管理 500mA USB Port/Adptr Li-Ion/Ply Batt Chgr 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 |
| AAT3681AIJS-4.1-T1 | 功能描述:電池管理 500mA USB Port/Adptr Li-Ion/Ply Batt Chgr 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 |
| AAT3681AIJS-4.2-1-T1 | 功能描述:IC BATT CHG LI-ION SC70JW-8 制造商:skyworks solutions inc. 系列:- 包裝:* 零件狀態(tài):上次購買時間 電池化學(xué):鋰離子/聚合物 電池數(shù):1 電流 - 充電:恒流 - 可編程 可編程特性:- 故障保護:超溫，過壓，短路 充電電流 - 最大值:500mA 電池組電壓:4.2V 電壓 -?供電（最高）:7.5V 接口:USB 工作溫度:-40°C ~ 85°C（TA） 封裝/外殼:* 供應(yīng)商器件封裝:* 標準包裝:1 |
| AAT3681AIJS-4.2-2-T1 | 制造商:Skyworks Solutions Inc 功能描述:POWER MANAGEMENT IC |
| AAT3681AIJS-4.2-4-T1 | 功能描述:電池管理 500mA USB Port/Adptr Li-Ion/Ply Batt Chgr 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。