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参数资料
| 型号： | LT3652IMSE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/26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
16
14
12
10
8
6
4
forward voltage yields the lowest power loss and highest
efficiency. The rectifier diode must be rated to withstand
reverse voltages greater than the maximum V IN voltage.
The minimum average diode current rating (I DIODE(MAX) )
is calculated with maximum output current (I CHG(MAX) ),
maximum operational V IN , and output at the precondition
threshold (V BAT(PRE) , or 0.7 ? V BAT(FLT) ):
I DIODE(MAX) > I CHG(MAX) ? (V IN(MAX) – V BAT(PRE) ) / V IN(MAX) ) (A)
12
16
20 24
28
32
MAXIMUM OPERATIONAL V IN VOLTAGE (V)
3652 F03
Figure 3. 7.2V at 1.5A Switched Inductor Values
Magnetics vendors typically specify inductors with
maximum RMS and saturation current ratings. Select an
inductor that has a saturation current rating at or above (1+
? I MAX /2) ? I CHG(MAX) , and an RMS rating above I CHG(MAX) .
Inductors must also meet a maximum volt-second product
requirement. If this specification is not in the data sheet of
an inductor, consult the vendor to make sure the maximum
For example, a rectifier diode for a 7.2V, 2A charger with
a 25V maximum input voltage would require:
I DIODE(MAX) > 2 ? (25 – 0.7[7.2]) / 25), or
I DIODE(MAX) > 1.6A
Battery Float Voltage Programming
The output battery float voltage (V BAT(FLT) ) is programmed
by connecting a resistor divider from the BAT pin to V FB .
V BAT(FLT) can be programmed up to 14.4V.
volt-second product is not being exceeded by your design.
The minimum required volt-second product is:
LT3652
BAT
R FB1
+
V BAT(FLT) ? (1 – V BAT(FLT) /V IN(MAX) ) (V ? μS)
V FB
Rectifier Selection
3652 F04
R FB2
The rectifier diode from SW to GND, in a LT3652 battery
charger provides a current path for the inductor current
Figure 4. Feedback Resistors from BAT to V FB
Program Float Voltage
when the main power switch is disabled. The rectifier is
selected based upon forward voltage, reverse voltage, and
maximum current. A Schottky diode is required, as low
3652fd
14
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| LT3653EDCB#TRMPBF | 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:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:升压（升压） 输出类型:两者兼有 输出数:1 输出电压:5V，2 V ~ 16.5 V 输入电压:2 V ~ 16.5 V PWM 型:- 频率 - 开关:45kHz 电流 - 输出:50mA 同步整流器:无 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 包装:管件 供应商设备封装:8-PDIP |
| 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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