參數(shù)資料
型號(hào)： LTC4001-1EUF#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16
封裝： 4 X 4 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-220WGGC, QFN-16
文件頁(yè)數(shù)： 5/20頁(yè)
文件大?。?/td> 227K
代理商： LTC4001-1EUF#TRPBF
13
LTC4001-1
40011f
where RNOM is the value of the bias resistor, RHOT and
RCOLD are the values of RNTC at the desired temperature
trip points. Continuing the example from before with a
desired hot trip point of 50
°C:
R
RR
k
k is nearest
Rk
k
k is nearest
NOM
COLD
HOT
==
()
=
()
=
–
.– .
.
– .
.– .
.,
%
.
.– .
.
–.
.,
.
%
2 815 0 4086
100
3 2636 0 3602
2 815 0 4086
120 8 121
1
1 100
0 4086
2 815 0 4086
3 266 0 3602
0 3602
13 3 13 3
1
The final solution is as shown if Figure 4 where RNOM =
121k, R1 = 13.3k and RNTC = 100k at 25°C.
Input and Output Capacitors
The LTC4001-1 uses a synchronous buck regulator to
provide high battery charging current. A 10
F chip ce-
APPLICATIO S I FOR ATIO
WU
UU
ramic capacitor is recommended for both the input and
output capacitors because it provides low ESR and ESL
and can handle the high RMS ripple currents. However,
some high Q capacitors may produce high transients due
to self-resonance under some start-up conditions, such
as connecting the charger input to a hot power source. For
more information, refer to Application Note 88.
EMI considerations usually make it desirable to minimize
ripple current in the battery leads, and beads or inductors
may be added to increase battery impedance at the 1.5MHz
switching frequency. Switching ripple current splits be-
tween the battery and the output capacitor depending on
the ESR of the output capacitor and the battery impedance.
If the ESR of the output capacitor is 0.1
and the battery
impedance is raised to 2
withabeadorinductor,only5%
of the ripple current will flow in the battery. Similar
techniques may also be applied to minimize EMI from the
input leads.
Figure 4. Extending the Delta Temperature
TOO COLD
LTC4001-1 NTC BLOCK
TOO HOT
0.29 VINSENSE
0.74 VINSENSE
RNOM
121k
VINSENSE
0.02 VINSENSE
NTC ENABLE
40011 F04
–
+
–
+
–
+
R1
13.3k
RNTC
100k
9
NTC
11
GNDSENS
4
相關(guān)PDF資料
PDF描述
LTC4009IUF#TRPBF BATTERY CHARGE CONTROLLER, 633 kHz SWITCHING FREQ-MAX, PQCC20
LTC4009IUF#PBF BATTERY CHARGE CONTROLLER, 633 kHz SWITCHING FREQ-MAX, PQCC20
LTC4009CUF-1#TRPBF BATTERY CHARGE CONTROLLER, 633 kHz SWITCHING FREQ-MAX, PQCC20
LTC4009CUF-2#TRPBF BATTERY CHARGE CONTROLLER, 633 kHz SWITCHING FREQ-MAX, PQCC20
LTC4009IUF-1#PBF BATTERY CHARGE CONTROLLER, 633 kHz SWITCHING FREQ-MAX, PQCC20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC4001EUF 制造商:Linear Technology 功能描述:Battery Charger Li-Ion/Li-Pol 2000mA 4.2V 16-Pin QFN EP
LTC4001EUF#PBF 功能描述:IC CHARGER LI-ION BUCK 16-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 其它有關(guān)文件:STC3100 View All Specifications 特色產(chǎn)品:STC3100 - Battery Monitor IC 標(biāo)準(zhǔn)包裝:4,000 系列:- 功能:燃料，電量檢測(cè)計(jì)/監(jiān)控器 電池化學(xué):鋰離子（Li-Ion） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MiniSO 包裝:帶卷 (TR) 其它名稱:497-10526-2
LTC4001EUF#TRPBF 功能描述:IC CHARGER LI-ION BUCK 16-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件
LTC4001EUF-1#PBF 功能描述:IC CHARGER LI-ION BUCK 16-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件
LTC4001EUF-1#PBF 制造商:Linear Technology 功能描述:IC BATT CHARGER SW MODE 16QFN
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