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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)： | 9/37頁 |
| 文件大小： | 898K |
| 代理商： | L6732 |
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L6732
Device description
17/37
rises with a slope of 100 mV/s, emulating in this way the breaking of the high-side
MOSFET as an over-voltage cause.
The device realizes the over-current-protection (OCP) sensing the current both on the
high-side MOSFET(s) and the low-side MOSFET(s) and so 2 current limit thresholds can be
set (see OCH pin and OCL pin in Table 4. Pins function):
●
Peak current limit
●
Valley current limit
The peak current protection is active when the high-side MOSFET(s) is turned on, after a
masking time of about 100 ns. The valley-current-protection is enabled when the low-side
MOSFET(s) is turned on after a masking time of about 400 ns. If, when the soft-start phase
is completed, an over current event occurs during the on time (peak-current-protection) or
during the off time (valley-current-protection) the device enters in HICCUP mode: the high-
side and low-side MOSFET(s) are turned off, the soft-start capacitor is discharged with a
constant current of 10 A and when the voltage at the SS pin reaches 0.5 V the soft-start
phase restarts. During the soft-start phase the OCP provides a constant-current-protection.
If during the TON the OCH comparator triggers an over current the high-side MOSFET(s) is
immediately turned off (after the masking time and the internal delay) and returned on at the
next PWM cycle. The limit of this protection is that the TON can't be less than masking time
plus propagation delay because during the masking time the peak-current-protection is
disabled. In case of very hard short circuit, even with this short TON, the current could
escalate. The valley-current-protection is very helpful in this case to limit the current. If
during the off-time the OCL comparator triggers an over current, the high-side MOSFET(s)
is not turned on until the current is over the valley-current-limit. This implies that, if it is
necessary, some pulses of the high-side MOSFET(s) will be skipped, guaranteeing a
maximum current due to the following formula:
Figure 11.
OVP: the low-side MOSFET is turned-on in advance
VOUT
VFB
LGate
109%
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相關代理商/技術參數(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 安裝風格: 封裝 / 箱體:CPAK |
| L6732CTR | 功能描述:開關變換器、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 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L6732TR | 功能描述:DC/DC 開關控制器 VOLTAGE REGULATOR RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK |
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