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参数资料
| 型号： | LM25066PSQX |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 电源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, QCC24 |
| 封装： | LLP-24 |
| 文件页数： | 17/48页 |
| 文件大小： | 1456K |
| 代理商： | LM25066PSQX |
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Option D:
The OVLO function can be disabled by grounding
the OVLO pin. The UVLO thresholds are set as described in
Option B or Option C.
POWER GOOD
When the voltage at the FB pin increases above its threshold,
the internal pull-down acting on the PGD pin is disabled al-
lowing PGD to rise to V
PGD through the pull-up resistor, RPG,
as shown in Figure 14. The pull-up voltage (V
PGD) can be as
high as 17V, and can be higher or lower than the voltages at
VIN and OUT. VDD is a convenient choice for V
PGD as it al-
lows interface to low voltage logic and avoids glitching on
PGD during power-up. If a delay is required at PGD, suggest-
C
PG adds delay to the rising edge, but not to the falling edge.
In Figure 15B, the rising edge is delayed by R
PG1 + RPG2 and
C
PG, while the falling edge is delayed a lesser amount by
R
lows for equal delays at the two edges, or a short delay at the
rising edge and a long delay at the falling edge.
Setting the output threshold for the PGD pin requires two re-
sistors (R4, R5) as shown in Figure 13 . While monitoring the
output voltage is shown in Figure 13, R4 can be connected to
any other voltage which requires monitoring.
The resistor values are calculated as follows:
Choose the upper and lower threshold (V
PGDH) and (VPGDL)
at V
OUT.
As an example, assume the application requires the following
thresholds: V
PGDH = 10.14V, and VPGDL = 9.9V. Therefore
V
PGD(HYS) = 0.24V. The resistor values are:
R4 = 10 k
, R5 = 1.3 k
Where the R4 and R5 resistor values are known, the threshold
voltages and hysteresis are calculated from the following:
301158a5
FIGURE 13. Programming the PGD Threshold
30115851
FIGURE 14. Power Good Output
www.national.com
24
LM25066
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相关代理商/技术参数 |
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|---|---|
| LM25066PSQX/NOPB | 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 |
| LM25069 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Positive Low Voltage Power Limiting Hot Swap Controller |
| LM25069MM-2EVAL | 功能描述:BOARD EVALUATION LM25069 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 |
| LM25069MM-2EVAL/NOPB | 功能描述:电源管理IC开发工具 LM25069MM-2 Eval Brd 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 |
| LM25069PMM-1 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Positive Low Voltage Power Limiting Hot Swap Controller |
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