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参数资料
| 型号： | LT3652IMSE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 18/26页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER SOLAR 2A 12MSOP |
| 标准包装： | 37 |
| 功能： | 充电管理，太阳能 |
| 电池化学： | 铅酸，LiFePO4，锂离子，锂聚合物，镍镉，镍氢 |
| 电源电压： | 4.95 V ~ 32 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-TSSOP （0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 12-MSOP，裸露焊盘 |
| 包装： | 管件 |
| 配用： | DC1568A-ND - BOARD BATTERY CHARGER SOLAR PWR |
LT3652
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 (V FLOAT(25°C) ) specified, and using
a convenient value of 2.4k for R SET , necessary resistor
values follow the relations:
R FB1 = –R SET ? (TC ? 4405)
= –2.4k ? (–0.0198 ? 4405) = 210k
R FB2 = R FB1 / ({[V FLOAT(25°C) + R FB1 ? (0.0674/
R SET )] / V FB } – 1)
= 210k/({[13.5 + 210k ? (0.0674/2.4k)]/3.3} – 1)
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 V FLOAT(1-CELL) = 4 × 10 –5 (T 2 )
– 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.
= 43k
R FB3 = 250k - R FB1 ||R FB2
= 250k – 210k||43k = 215k (see the Battery Float
Voltage Programming section)
BAT
LM234
BAT
V FB
LT3652
196k
69k
198k
69k
6-CELL
LEAD-ACID
BATTERY +
22k
B = 3380
3652 F10a
R FB1
210k
R SET
2.4k
R
V +
V –
+
14.8
14.6
V FB
LT3652
R FB3
215k
R FB2
43k
6-CELL
LEAD-ACID
BATTERY
14.4
14.2
14.0
14.3
14.2
14.0
3652 F09a
13.8
13.6
13.4
13.2
13.0
THEORETICAL V FLOAT
PROGRAMMED V BAT(FLOAT)
13.8
–19.8mV/°C
12.8
–10
0
10
20 30
40
50
60
13.6
TEMPERATURE (°C)
3652 F10b
13.4
13.2
13.0
12.8
Figure 10. Thermistor-Based Temperature Compensation
Network Programs V FLOAT to Closely Match Ideal Lead-Acid
Float Charge Voltage for 6-Cell Charger
12.6
–10
0
10
20 30
40
50
60
TEMPERATURE (°C)
3652 F09b
Figure 9. Lead-Acid 6-Cell Float Charge Voltage vs
Temperature Has –19.8mV/°C Characteristic Using LM234 with
Feedback Network
3652fd
18
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| LT3653EDCB#TRPBF | 功能描述:IC REG BUCK ADJ 1.2A 8DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
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