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參數(shù)資料
| 型號： | LT3652EDD#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3 A BATTERY CHARGE CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO12 |
| 封裝： | 3 X 3 MM, LEAD FREE, PLASTIC, DFN-12 |
| 文件頁數(shù)： | 10/26頁 |
| 文件大?。?/td> | 253K |
| 代理商： | LT3652EDD#TRPBF |
LT3652
18
3652fc
APPLICATIONS INFORMATION
or –19.8mV/°C. Using the feedback network shown in
Figure 9, with the desired temperature coefficient (TC)
and 25°C float voltage (VFLOAT(25°C)) specified, and using
a convenient value of 2.4k for RSET, necessary resistor
values follow the relations:
RFB1 = –RSET (TC 4405)
= –2.4k (–0.0198 4405) = 210k
RFB2 = RFB1 / ({[VFLOAT(25°C) + RFB1 (0.0674/
RSET)] / VFB} – 1)
= 210k/({[13.5 + 210k (0.0674/2.4k)]/3.3} – 1)
= 43k
RFB3 = 250k - RFB1||RFB2
= 250k – 210k||43k = 215k (see the Battery Float
Voltage Programming section)
While the circuit in Figure 9 creates a linear temperature
characteristic that follows a typical –3.3mV/°C per cell
lead-acid specification, the theoretical float charge voltage
characteristic is slightly nonlinear. This nonlinear charac-
teristic follows the relation VFLOAT(1-CELL) = 4 × 10–5 (T2)
– 6 × 10–3(T) + 2.375 (with a 2.18V minimum), where
T = temperature in °C. A thermistor-based network can
be used to approximate the nonlinear ideal temperature
characteristic across a reasonable operating range, as
shown in Figure 10.
LT3652
RFB3
215k
RFB2
43k
RSET
2.4k
RFB1
210k
6-CELL
LEAD-ACID
BATTERY
LM234
3652 F09a
V+
V–
R
BAT
VFB
+
Figure 9. Lead-Acid 6-Cell Float Charge Voltage vs
Temperature Has –19.8mV/°C Characteristic Using LM234 with
Feedback Network
TEMPERATURE (°C)
–10
V
FLOAT
(V)
10
50
40
60
020
30
3652 F09b
12.6
12.8
13.0
13.2
13.4
13.6
13.8
14.0
14.2
14.3
–19.8mV/°C
LT3652
196k
198k
6-CELL
LEAD-ACID
BATTERY
22k
B = 3380
3652 F10a
BAT
69k
VFB
+
TEMPERATURE (°C)
–10
V
FLOAT
(V)
10
50
40
60
020
30
3652 F10b
12.8
13.0
13.2
13.4
13.6
13.8
14.0
14.6
14.4
14.2
14.8
THEORETICAL VFLOAT
PROGRAMMED VBAT(FLOAT)
Figure 10. Thermistor-Based Temperature Compensation
Network Programs VFLOAT to Closely Match Ideal Lead-Acid
Float Charge Voltage for 6-Cell Charger
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LT3652EMSE | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Power Tracking 2A Battery Charger for Solar Power |
| LT3652EMSE#PBF | 功能描述:IC BATTERY CHARGER SOLAR 12MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學:堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| LT3652EMSE#PBF | 制造商:Linear Technology 功能描述:BATTERY CHARGER FOR SOLAR POWER 制造商:Linear Technology 功能描述:IC, BATTERY CHARGER, 2A, MSOP-12 |
| LT3652EMSE#TRPBF | 功能描述:IC BATT CHARGER SOLAR 2A 12MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:61 系列:- 功能:電源管理 電池化學: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 |
| LT3652EMSEPBF | 制造商:Linear Technology 功能描述:Battery Charger Li-Ion 2A 4.2V MSOP12EP |
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