- 您现在的位置：买卖IC网 > PDF目录80327 > LM5067SDX-1 (NATIONAL SEMICONDUCTOR CORP) 2-CHANNEL POWER SUPPLY SUPPORT CKT, DSO10 PDF资料下载
参数资料
| 型号： | LM5067SDX-1 |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, DSO10 |
| 封装： | LLP-10 |
| 文件页数： | 3/24页 |
| 文件大小： | 690K |
| 代理商： | LM5067SDX-1 |
30030930
FIGURE 3. Power Up Sequence (Current Limit only)
Operating Voltage
The LM5067 operating voltage is the voltage from VCC to
VEE. The maximum operating voltage is set by an internal
13V zener diode. With the IC connected as shown in Figure
1, the LM5067 controller operates in the voltage range be-
tween VEE and VEE+13V. The remainder of the system
voltage is dropped across the input resistor R
IN, which must
be selected to pass at least 2 mA into the LM5067 at the min-
imum system voltage.
Gate Control
The external N-channel MOSFET is turned on when the
GATE pin sources 52 A to enhance the gate. During normal
operation (t3 in Figure 3) Q1’s gate is held charged to ap-
proximately 13V above VEE, typically within 20 mV of the
voltage at VCC. If the maximum V
GS rating of Q1 is less than
13V, a lower voltage external zener diode must be added be-
tween the GATE and SENSE pins. The external zener diode
must have a forward current rating of at least 110 mA.
When the system voltage is initially applied (before the oper-
ating voltage reaches the POR
IT threshold), the GATE pin is
held low by a 110 mA pull-down current. The pull-down cur-
rent helps prevent an inadvertent turn-on of the MOSFET
through its drain-gate capacitance as the applied system volt-
age increases.
During the insertion time (t1 in Figure 3) the GATE pin is held
low by a 2.2 mA pull-down current. This maintains Q1 in the
off-state until the end of t1, regardless of the voltage at VCC
and UVLO.
Following the insertion time, during t2 in Figure 3, the gate
voltage of Q1 is modulated to keep the current or Q1’s power
dissipation level from exceeding the programmed levels. Cur-
rent limiting and power limiting are considered fault condi-
tions, during which the voltage on the TIMER pin capacitor
increases. If the current and power limiting cease before the
TIMER pin reaches 4V the TIMER pin capacitor is discharged,
and the circuit enters normal operation. See the Fault Timer
& Restart paragraph for details on the fault timer.
If the system input voltage falls below the UVLO threshold, or
rises above the OVLO threshold, the GATE pin is pulled low
by the 2.2 mA pull-down current to switch off Q1.
11
www.national.com
LM5067
相关PDF资料 |
PDF描述 |
|---|---|
| LS4601-7ERD1TB1 | 1-OUTPUT 100 W AC-DC PWR FACTOR CORR MODULE |
| LS4601-7ERD5TB1 | 1-OUTPUT 100 W AC-DC PWR FACTOR CORR MODULE |
| LS4001-7EPD2B2 | 1-OUTPUT 100 W AC-DC PWR FACTOR CORR MODULE |
| LS4001-7EPTB2 | 1-OUTPUT 100 W AC-DC PWR FACTOR CORR MODULE |
| LS4001-7ERD2B2 | 1-OUTPUT 100 W AC-DC PWR FACTOR CORR MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM5068 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:NEGATIVE VOLTAGE HOT SWAP CONTROLLER |
| LM5068EVAL | 功能描述:电源管理IC开发工具 LM5068 EVAL BOARD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| LM5068EVAL/NOPB | 功能描述:EVALUATION BOARD FOR LM5068 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
| LM5068MM-1 | 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| LM5068MM-1/MMX-1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Negative Voltage Hot Swap Controller |
发布紧急采购，3分钟左右您将得到回复。