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参数资料
| 型号： | PS200-I/SS |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO20 |
| 封装： | 5.30 MM, PLASTIC, MO-150, SSOP-20 |
| 文件页数： | 34/36页 |
| 文件大小： | 537K |
| 代理商： | PS200-I/SS |
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2005 Microchip Technology Inc.
DS21891B-page 5
PS200
2.0
LITHIUM CHEMISTRY
ALGORITHM
The PS200 provides an unprecedented level of
configurability for charging Lithium Ion/Lithium Polymer
battery packs. It’s precision, 10-bit Analog-to-Digital
converter and high-frequency Pulse-Width Modulator
enable the PS200 to provide optimum control of
charging algorithms for lithium battery chemistries.
Special features include an internal voltage regulator
and an internal clock oscillator that reduce external
component count.
2.1
Lithium Overview
2.1.1
MULTI-STEP CHARGING
To ensure the proper treatment of lithium chemistries
during extreme temperature and voltage conditions,
multi-step charging is required. The PS200 starts the
charging cycle upon sensing the presence of a battery
pack and a valid charging supply. During charge
qualification, the battery’s temperature and voltage are
measured to determine the appropriate initial state.
The initial states include Charge Suspend, Precharge
and Current
Regulation. Charge Suspend
halts
charging when the user defined preset conditions for
charging are not met. Precharge allows for the
recovery of deeply discharged batteries by applying a
low-charge
current.
Current
Regulation
provides
constant
current,
voltage
limited
charge.
Upon
reaching the target voltage during Current Regulation,
the Voltage Regulation state is entered. Charging
continues at a constant voltage until the current
decreases to the user specified minimum current
threshold (VRIMin). At this threshold, charging is
terminated and the End-Of-Charge state is reached.
The state diagram illustrates the charging cycle (see
2.1.2
USER CONFIGURABLE
PARAMETERS
The PS200 supports user configurable parameters that
allow for customizing the charging profile. This feature
allows for the maximum reuse of hardware, thus
reducing time-to-market. These parameters include:
Battery Temperature:
- Minimum/maximum temperature for charge
initiation
- Maximum temperature allowed during charge
Battery Voltage:
- Minimum/maximum voltage for charge
initiation
- Target voltage during Voltage Regulation
- Voltage at which the charger will restart
charging after completion of a valid charge
cycle
Charge Current:
- Target current during Current Regulation
- Taper current threshold for End-Of-Charge
during Voltage Regulation
- Target current during Precharge
Time:
- Precharge time limit
- Current Regulation time limit
- Voltage Regulation time limit
Status Display:
- Two LEDs denote the charge states. Their
flash rates can be modified.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PS-200-MCP | 制造商:SPC Multicomp 功能描述:BRIEF CASE CONDUCTIVE 制造商:SPC Multicomp 功能描述:BRIEF CASE, CONDUCTIVE |
| PS200-NA | 制造商:EMCORE 制造商全称:Emcore Corporation 功能描述:Optiva SERIES Professional Media Transport |
| PS200R | 制造商:PANJIT 制造商全称:Pan Jit International Inc. 功能描述:FAST SWITCHING PLASTIC RECTIFIER(VOLTAGE - 50 to 1000 Volts CURRENT - 2.0 Amperes) |
| PS200R _AY _10001 | 制造商:PanJit Touch Screens 功能描述: |
| PS200R_04 | 制造商:PANJIT 制造商全称:Pan Jit International Inc. 功能描述:FAST SWITCHING PLASTIC RECTIFIER |
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