參數(shù)資料
型號(hào)： L6924U013
廠商： STMICROELECTRONICS
元件分類(lèi)： 電源管理
英文描述： POWER SUPPLY SUPPORT CKT, PQCC16
封裝： 3 X 3 MM, ROHS COMPLIANT, VFQFPN-16
文件頁(yè)數(shù)： 16/37頁(yè)
文件大?。?/td> 789K
代理商： L6924U013
L6924U
Application information: monitoring and protection
Doc ID 14716 Rev 2
23/37
8
Application information: monitoring and protection
The L6924U uses a VFQFPN (3 x 3 mm) 16-pin package with an exposed pad that allows
the user to have a compact application and good thermal behavior at the same time. The
L6924U has a low thermal resistance because of the exposed pad (approximately
75 °C/W, depending on the board characteristics). Moreover, a built-in thermal protection
feature prevents the L6924U from having thermal issues typically present in a linear charger.
Thermal control is implemented with a thermal loop that reduces the charge current
automatically when the junction temperature reaches approximately 120 °C. This avoids
further temperature rise and keeps the junction temperature constant. This simplifies the
thermal design of the application as well as protects the device against over-temperature
damage.
shows how the thermal loop acts (dotted lines), when the junction temperature
reaches 120 °C.
8.1
NTC thermistor
The device allows designers to monitor the battery temperature by measuring the voltage
across an NTC or PTC resistor. Li-Ion batteries have a narrow range of operating
temperature, usually from 0 °C to 50 °C. This window is programmable by an external
divider which is comprised of an NTC thermistor connected to GND and a resistor
connected to VREF. When the voltage on the TH pin exceeds the minimum or maximum
voltage threshold (internal window comparator), the device stops the charge process, and
indicates a fault condition through the status pin.
Figure 16.
Power dissipation in both linear and quasi pulse modes with thermal loop
相關(guān)PDF資料
PDF描述
L6924U013TR POWER SUPPLY SUPPORT CKT, PQCC16
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6924U013TR 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:USB compatible battery charger system with integrated power switch for Li-Ion/Li-Polymer
L6924UTR 功能描述:電池管理 Battery Charger USB Compatible RoHS:否 制造商:Texas Instruments 電池類(lèi)型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
L6925 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
L6925013TR 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
L6925D 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 Synchronous Step-Dwn RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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