- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄224115 > LTC4010CFE#PBF (LINEAR TECHNOLOGY CORP) High Efficiency Standalone Nickel Battery Charger; Package: TSSOP; No of Pins: 16; Temperature Range: 0°C to +70°C PDF資料下載
參數(shù)資料
| 型號： | LTC4010CFE#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High Efficiency Standalone Nickel Battery Charger; Package: TSSOP; No of Pins: 16; Temperature Range: 0°C to +70°C |
| 中文描述： | BATTERY CHARGE CONTROLLER, 615 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 4.40 MM, LEAD FREE, EXPOSED PAD, PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 9/24頁 |
| 文件大小： | 212K |
| 代理商： | LTC4010CFE#PBF |
17
LTC4010
4010fa
APPLICATIO S I FOR ATIO
WU
UU
INTVDD Regulator Output
If BGATE is left open, the INTVDD pin of the LTC4010 can
be used as an additional source of regulated voltage in the
host system any time READY is active. Switching loads on
INTVDD may reduce the accuracy of internal analog cir-
cuits used to monitor and terminate fast charging. In
addition, DC current drawn from the INTVDD pin can
greatly increase internal power dissipation at elevated VCC
voltages. A minimum ceramic bypass capacitor of 0.1
F is
recommended.
Calculating Average Power Dissipation
The user should ensure that the maximum rated IC junc-
tion temperature is not exceeded under all operating con-
ditions. The thermal resistance of the LTC4010 package
(
θJA) is 38°C/W, provided the exposed metal pad is prop-
erly soldered to the PCB. The actual thermal resistance in
the application will depend on the amount of PCB copper
to which the package is soldered. Feedthrough vias di-
rectly below the package that connect to inner copper
layers are helpful in lowering thermal resistance. The fol-
lowing formula may be used to estimate the maximum
average power dissipation PD (in watts) of the LTC4010
under normal operating conditions.
PV
mA I
k Q
Q
In
VV
R
D
CC
DD
TGATE
BGATE
DD
CC
LED
=+
+
()
+
9
615
385
60
30
2
()
–.
–
where:
IDD = Average external INTVDD load current, if any
QTGATE = Gate charge of external P-channel MOSFET
in coulombs
QBGATE = Gate charge of external N-channel MOSFET
(if used) in coulombs
VLED = Maximum external LED forward voltage
RLED = External LED current-limiting resistor used in
the application
n = Number of LEDs driven by the LTC4010
External Thermistor
The network for proper temperature sensing using a
thermistor with a negative temperature coefficient (NTC)
is shown in Figure 5. The LTC4010 is designed to work
best with a 1% 10k NTC thermistor with a
β of 3750.
However, the LTC4010 will operate satisfactorily with
other 10k NTC thermistors having slightly different nomi-
nal exponential temperature coefficients. For these ther-
mistors, the temperature related limits given in the Electri-
cal Characteristics table may not strictly apply. The filter
formed by C1 in Figure 5 is optional but recommended for
rejecting PWM switching noise.
Figure 4. Single-Cell Monitor Network
10
7
BAT
10k
33nF
1 CELL
4010 F04
VCDIV
6
VCELL
Figure 5. External NTC Thermistor Network
5
VTEMP
RT
10k NTC
C1
68nF
4010 F05
Disabling Thermistor Functions
Temperature sensing is optional in LTC4010 applications.
For low cost systems where temperature sensing may not
be required, the VTEMP pin may simply be wired to INTVDD
through 8.66k to disable temperature qualification of all
charging operations. Alternatively, a 10k resistor may be
connected between VTEMP and GND. However, this prac-
tice is not recommended for NiMH cells charged well
above or below their 1C rate, because fast charge termina-
tion based solely on voltage inflection may not be ad-
equate to protect the battery from a severe overcharge.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC4010CFE#TRPBF | High Efficiency Standalone Nickel Battery Charger; Package: TSSOP; No of Pins: 16; Temperature Range: 0°C to +70°C |
| LTC4011CFE#PBF | High Efficiency Standalone Nickel Battery Charger; Package: TSSOP; No of Pins: 16; Temperature Range: 0°C to +70°C |
| LTC4011CFE#TRPBF | High Efficiency Standalone Nickel Battery Charger; Package: TSSOP; No of Pins: 16; Temperature Range: 0°C to +70°C |
| LTC4050EMS-4.1#PBF | Lithium-Ion Linear Battery Charger Controller with Thermistor Interface; Package: MSOP; No of Pins: 10; Temperature Range: -40°C to +125°C |
| LTC4050EMS-4.1#TRPBF | Lithium-Ion Linear Battery Charger Controller with Thermistor Interface; Package: MSOP; No of Pins: 10; Temperature Range: -40°C to +125°C |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4010CFETR | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
| LTC4010CFETRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
| LTC4010EFE | 制造商:LINEAR 制造商全稱:LINEAR 功能描述:High Efficiency Standalone Nickel Battery Charger |
| LTC4011 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
| LTC4011_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。