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參數(shù)資料
| 型號： | L6731D |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | HTSSOP-16 |
| 文件頁數(shù)： | 7/23頁 |
| 文件大?。?/td> | 386K |
| 代理商： | L6731D |
L6731D
Device description
15/23
Equation 1
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 9. 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
HICCUP mode during an OCP
5.10
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.
5.11
Minimum on-time (TON, MIN)
The device can manage minimum on-times lower than 100ns. This feature comes down
from the control topology and from the particular over-current-protection system of the
L6731D. In fact, in a voltage mode controller the current has not to be sensed to perform the
regulation and, in the case of L6731D, neither for the over-current protection, given that
MIN
ON
VALLEY
MAX
T
L
Vout
Vin
I
,
+
=
Figure 9.
Constant current and hiccup mode during an OCP
VSS
VCOMP
IL
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6731DTR | 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 |
| L6732 | 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 |
| 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 |
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