- 您现在的位置：买卖IC网 > PDF目录67755 > L6731D (STMICROELECTRONICS) 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 PDF资料下载
参数资料
| 型号： | L6731D |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | HTSSOP-16 |
| 文件页数： | 7/23页 |
| 文件大小： | 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
相关PDF资料 |
PDF描述 |
|---|---|
| L9230-DIE1 | STEPPER MOTOR CONTROLLER, UUC |
| L9230 | STEPPER MOTOR CONTROLLER, PDSO20 |
| LA5680T | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQFP48 |
| LA5681T | SWITCHING CONTROLLER, 520 kHz SWITCHING FREQ-MAX, PQFP48 |
| LA79500E | 6-CHANNEL, VIDEO MULTIPLEXER, QFP80 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6731DTR | 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 |
| L6732 | 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 |
| 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 |
发布紧急采购，3分钟左右您将得到回复。