參數(shù)資料
型號(hào)： LTC3586EUFE-1#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： BATTERY CHARGE CONTROLLER, PQCC38
封裝： 4 X 6 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, QFN-38
文件頁(yè)數(shù)： 20/36頁(yè)
文件大?。?/td> 317K
代理商： LTC3586EUFE-1#TRPBF
LTC3586/LTC3586-1
27
3586fa
APPLICATIONS INFORMATION
By using a bias resistor, RNOM, different in value from
R25, the hot and cold trip points can be moved in either
direction. The temperature span will change somewhat due
to the non-linear behavior of the thermistor. The following
equations can be used to easily calculate a new value for
the bias resistor:
R
r
R
r
R
NOM
HOT
NOM
COLD
=
0 536
25
325
25
.
.
where rHOT and rCOLD are the resistance ratios at the de-
sired hot and cold trip points. Note that these equations
are linked. Therefore, only one of the two trip points can
be chosen, the other is determined by the default ratios
designed in the IC. Consider an example where a 60°C
hot trip point is desired.
From the Vishay Curve 1 R-T characteristics, rHOT is
0.2488 at 60°C. Using the above equation, RNOM should
be set to 46.4k. With this value of RNOM, the cold trip point
is about 16°C. Notice that the span is now 44°C rather
than the previous 40°C. This is due to the decrease in
“temperature gain” of the thermistor as absolute tem-
perature increases.
The upper and lower temperature trip points can be inde-
pendently programmed by using an additional bias resistor
as shown in Figure 6b. The following formulas can be used
to compute the values of RNOM and R1:
R
rr
R
RR
r
NOM
COLD
HOT
NOM
HOT
=
–
.
.
–
2 714
25
1 0 536
R
R25
For example, to set the trip points to 0°C and 45°C with
a Vishay Curve 1 thermistor choose:
Rk
k
NOM ==
3 266 0 4368
2 714
100
104 2
.– .
.
the nearest 1% value is 105k:
R1 = 0.536 105k – 0.4368 100k = 12.6k
the nearest 1% value is 12.7k. The nal circuit is shown
in Figure 6b and results in an upper trip point of 45°C and
a lower trip point of 0°C.
–
+
–
+
RNOM
100k
RNTC
100k
NTC
0.017 VBUS
NTC_ENABLE
3586 F06a
LTC3586/LTC3586-1
NTC BLOCK
TOO_COLD
TOO_HOT
0.765 VBUS
0.349 VBUS
–
+
5
VBUS
T
(6a)
(6b)
Figure 6. NTC Circuits
–
+
–
+
RNOM
105k
RNTC
100k
R1
12.7k
NTC
VBUS
0.017 VBUS
NTC_ENABLE
3586 F06b
TOO_COLD
TOO_HOT
0.765 VBUS
0.349 VBUS
–
+
5
LTC3586/LTC3586-1
NTC BLOCK
T
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LTC3586EUFE-2#TRPBF 功能描述:IC USB POWER MANAGER HE 38-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:Bat-Track™, PowerPath™ 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR
LTC3586EUFE-3#PBF 功能描述:IC USB POWER MANAGER HE 38-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:Bat-Track™, PowerPath™ 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR
LTC3586EUFE-3#TRPBF 功能描述:IC USB POWER MANAGER HE 38-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:Bat-Track™, PowerPath™ 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR
LTC3586EUFE-PBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Effi ciency USB Power Manager with Boost, Buck-Boost and Dual Bucks
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