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参数资料
| 型号： | L6732 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | LEAD FREE, HTSSOP-16 |
| 文件页数： | 9/37页 |
| 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6732_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6732_0906 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6732C | 功能描述:DC/DC 开关控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6732CTR | 功能描述:开关变换器、稳压器与控制器 Step-Dwn Controller RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| L6732TR | 功能描述:DC/DC 开关控制器 VOLTAGE REGULATOR RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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