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参数资料
| 型号： | KIT34675EPEVBE |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 2/14页 |
| 文件大小： | 0K |
| 描述： | KIT EVALUATION FOR MC34675 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电池充电器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | MC34675 |
| 主要属性： | 1 芯锂离子电池 |
| 次要属性： | LED 状态指示器 |
| 已供物品： | 板，CD |
Application Diagram
simply interfaced to the system or LEDs to report the charge status. Its internal thermal foldback
control reduces the charge current automatically whenever the die temperature reaches the
thermal limit threshold of 120 o C to keep the charger safe. When there is no input power or when
the MC34675 is disabled, the charger only draws less than 1uA leakage current from the battery.
The MC34675 provides a 4.85V linear regulator with 10mA current capability to supply
subsystem such as USB transceiver when the subsystem requires a supply voltage higher than
the battery voltage.
3
3.1
Application Diagram
Standalone Charger
The MC34675 can be used as a standalone Li-Ion charger. Figure 1 is the typical application
circuit. Two LEDs indicate the charge status.
DC
Input
VIN
BAT
RED GREEN
1μF
2.2μF
Li+
470
470
GND
MC34675
ISET
7.9K
PPR
CHG
EN
DET
0.22μF
Figure 1. The Standalone Li-Ion Charger
3.2
Embedded Charger
When the MC34675 is embedded in the system, the system MCU can control the charger
through the EN pin and get the charge status through PPR and CHG pins. The regulator output
can be used to supply the USB transceiver. Figure 2 is the typical application circuit.
Using the High Input Voltage Charger for Single Cell Li-Ion Batteries , Rev. 1
2
Freescale Semiconductor
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