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参数资料
| 型号： | LTC4063EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHRGR LI-ION LDO 10DFN |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 4.3 V ~ 8 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN（3x3） |
| 包装： | 带卷 (TR) |
LTC4063
OPERATION
V OUT = 800 mV ? ? 1 +
SINGLECELL
Li-Ion BATTERY
+
BAT OUT
LTC4063
GND
FB
R2
R1
V OUT
C OUT
4063 F01
anywhere between 1.2V and 4.2V, although the upper
limit is limited by the battery voltage minus the regulator
dropout voltage.
? R2 ?
?
? R 1 ?
Time ( Hours ) = TIMER ? 3 Hours
I DETECT =
? I CHG =
R DET =
Figure 1. Adjustable Linear Regulator
Figure 1 shows how an external resistor divider sets the
regulator output voltage. The output voltage can be set
APPLICATIONS INFORMATION
Programming Charge Termination
The LTC4063 terminates a charge cycle using several
methods, allowing the designer considerable flexibility in
choosing an ideal charge termination algorithm. Table 1
shows a brief description of the different termination
methods and their behavior.
Charge Time Termination
Connecting a capacitor (C TIMER ) to the TIMER pin enables
the timer and selects Charge Time Termination. The total
charge time is set by:
C
0 . 1 μF
Table 1.
In order to maintain stability under light load conditions,
the maximum recommended value of R1 is 160k.
When the programmed time has elapsed, the charge
cycle terminates and the charger enters standby mode.
Subsequent recharge cycles terminate when half the
programmed time has elapsed.
The IDET pin determines the behavior of the CHRG output.
Connecting a resistor (R DET ) from the IDET pin to ground
sets the charge current detection threshold, I DETECT :
R PROG 100 V
10 R DET R DET
or
100 V
I DE T ECT
METHOD
TIMER
I DET
CHARGER DESCRIPTION
CHRG OUTPUT DESCRIPTION
Charge Time
Termination
0.1μF to
GND
R DET to Charges for 3 Hours. After 3 Hours, the Charger Pull-Down State While I BAT > I DETECT . High Impedance
GND Stops Charging and Enters Standby Mode. State While I BAT < I DETECT or When Charging is Stopped
Recharge Cycles Last for 1.5 Hours
0.1μF to
GND
NC
Charges for 3 Hours. After 3 Hours, the Charger Pull-Down State When Charging. High Impedance State
Stops Charging and Enters Standby Mode. When Charging is Stopped
Recharge Cycles Last for 1.5 Hours
Charge Current
Termination
User-Selectable
Charge
Termination
GND
GND
V CC
V CC
R DET to
GND
NC
R DET to
GND
NC
Charges Until Charge Current Drops Below
I DETECT , Then Enters Standby Mode
Charges Inde?nitely Until CHGEN Pin is Pulled
High
Charges Inde?nitely Until CHGEN Pin is Pulled
High. SmartStart is Disabled
Charges Inde?nitely Until CHGEN Pin is Pulled
High. SmartStart is Disabled
Pull-Down State When Charging. High Impedance State
When Charging is Stopped
Pull-Down State When Charging. High Impedance State
When Charging is Stopped
Pull-Down State While I BAT > I DETECT . High Impedance
State While I BAT < I DETECT or When Charging is Stopped
Pull-Down State When Charging. High Impedance State
When Charging is Stopped
4063fc
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