- 您现在的位置：买卖IC网 > PDF目录44976 > LSP4054CLAD (LITE-ON SEMICONDUCTOR CORP) 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 PDF资料下载
参数资料
| 型号： | LSP4054CLAD |
| 厂商： | LITE-ON SEMICONDUCTOR CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封装： | SOT-23, 5 PIN |
| 文件页数： | 10/17页 |
| 文件大小： | 634K |
| 代理商： | LSP4054CLAD |
Liteon Semiconductor Corporation
LSP4054
Standalone Linear Li-ion Battery Charger with Thermal Regulation
Rev1.1
2/17
BLOCK DIAGRAM
PIN FUNCTION
CHRG
: When the battery is charging, the CHRG pin is pulled low by an internal N-channel MOSFET. When the
charge cycle is completed, a weak pull-down of approximately 20uA is connected to the CHRG pin, including an “AC
present” condition. When the LSP4054 detects an undervoltage lockout condition, CHRG is forced high impedance.
GND
: Ground.
BAT
: Provides charge current to the battery and regulators the final voltage to 4.2V. An internal precision resistor
divider from this pin sets the float voltage which is disconnected in shutdown mode.
Vcc
: Provides power to the charger. Vcc can range from 4.25V to 6.5V and should be bypassed with at least a 1uF
capacitor. When Vcc drops to within 30mV of the BAT pin voltage, the LSP4054 enters shutdown mode, dropping
IBAT to less than 2uA.
PROG
: The charge current is programmed by connected a 1% resistor, RPROG, to ground. When charging in
constant-current mode, this pin servos to 1V. In all modes, the voltage on this pin can be used to measure the
charge current using the following formula:
The PROG pin can also be used to shut down the charger. Disconnecting the program resistor from ground allows a
3uA current to pull the PROG pin high. When it reaches the 1.21V shutdown threshold voltage, the charger enters
shutdown mode, charging stops and the input supply current drops to 25uA. This pin is also clamped to
approximately 2.4V. Driving this pin to voltages beyond the clamp voltage will draw current as high as 1.5mmA.
Reconnected RPROG to ground will return the charger to normal operation.
相关PDF资料 |
PDF描述 |
|---|---|
| LSP5503SEC | 4 A SWITCHING REGULATOR, 470 kHz SWITCHING FREQ-MAX, PDSO8 |
| LT1004IDRG4-1-2 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.235 V, PDSO8 |
| LT1004CLP-2-5 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PBCY3 |
| LT1004IPW-2-5 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO8 |
| LT1004CPWRE4-2-5 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LSP421 | 制造商:Black Box Corporation 功能描述:10GBASE-SR SFP+ EXT DIAGMM 850 LC 300M |
| LSP421-W1 | 制造商:Black Box Corporation 功能描述:1 YEAR WARRANTY FOR LSP421 |
| LSP421-W3 | 制造商:Black Box Corporation 功能描述:3 YEAR WARRANTY FOR LSP421 |
| LSP422 | 制造商:Black Box Corporation 功能描述:10GBASE-LR SFP+ EXT DIAGSM 1310 LC 10KM |
| LSP422-W1 | 制造商:Black Box Corporation 功能描述:1 YEAR WARRANTY FOR LSP422 |
发布紧急采购，3分钟左右您将得到回复。