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參數(shù)資料
| 型號： | L6732 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | LEAD FREE, HTSSOP-16 |
| 文件頁數(shù)： | 10/37頁 |
| 文件大?。?/td> | 898K |
| 代理商： | L6732 |
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Device description
L6732
18/37
Equation 4
During soft-start the OC acts in constant current mode: a current control loop limits the value
of the error amplifier output (comp), in order to avoid its saturation and thus recover faster
when the output returns in regulation. Figure 12. shows the behavior of the device during an
over current condition that persists also in the soft-start phase.
L6732 provides under voltage (UV) protection: when the voltage on FB pin falls below 80 %
of the reference, the IC will enter HICCUP mode.
Feedback disconnection is also provided by sourcing a 100 nA current from FB pin. if FB
results being floating, the IC will detect and OV so latching its condition with Low Side
MOSFET firmly ON
5.9
Thermal shutdown
When the junction temperature reaches 150 °C ±10 °C the device enters in thermal
shutdown. Both MOSFETs are turned off and the soft-start capacitor is rapidly discharged
with an internal switch. The device doesn't restart until the junction temperature goes down
to 120 °C and, in any case, until the voltage at the soft-start pin reaches 500 mV.
5.10
Synchronization
The presence of many converters on the same board can generate beating frequency noise.
To avoid this it is important to make them operate at the same switching frequency.
Moreover, a phase shift between different modules helps to minimize the RMS current on
synchronization. Two or more devices can be synchronized simply connecting together the
SYNCH pins. The device with the higher switching frequency will be the Master while the
Figure 12.
Constant current and hiccup mode during an OCP
MIN
ON
VALLEY
MAX
T
L
Vout
Vin
I
,
+
=
VSS
VCOMP
IL
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6732_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6732_0906 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6732C | 功能描述:DC/DC 開關(guān)控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| L6732CTR | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Step-Dwn Controller RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L6732TR | 功能描述:DC/DC 開關(guān)控制器 VOLTAGE REGULATOR RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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