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参数资料
| 型号： | LM25066APSQE |
| 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： | 15/48页 |
| 文件大小： | 1658K |
| 代理商： | LM25066APSQE |
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30146029
FIGURE 10. UVLO and OVLO Thresholds Set By R1-R3
The procedure to calculate the resistor values is as follows:
- Choose the upper UVLO threshold (V
UVH) and the lower
UVLO threshold (V
UVL).
- Choose the upper OVLO threshold (V
OVH).
- The lower OVLO threshold (V
OVL) cannot be chosen in ad-
vance in this case, but is determined after the values for R1-
R3 are determined. If V
OVL must be accurately defined in
addition to the other three thresholds, see Option B below.
The resistors are calculated as follows:
(11)
(12)
(13)
The lower OVLO threshold is calculated from:
(14)
As an example, assume the application requires the following
thresholds: V
UVH = 8V, VUVL = 7V, VOVH = 15V.
(15)
(16)
(17)
The lower OVLO threshold calculates to 12.03V and the OV-
LO hysteresis is 2.97V. Note that the OVLO hysteresis is
always slightly greater than the UVLO hysteresis in this con-
figuration. When the R1-R3 resistor values are known, the
threshold voltages and hysteresis are calculated from the fol-
lowing:
(18)
(19)
V
UV(HYS) = R1 x 23A
(20)
(21)
V
OV(HYS) = (R1 + R2) x 23A
Option B:
If all four thresholds must be accurately defined,
the configuration in Figure 11 can be used.
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LM25066A
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| LM25066APSQE/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 |
| LM25066APSQX | 制造商:TI 制造商全称:Texas Instruments 功能描述:System Power Management and Protection IC with PMBusa?￠ |
| LM25066APSQX/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 |
| LM25066EVK/NOPB | 功能描述:电源管理IC开发工具 LM25066 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 |
| LM25066IAPSQ/NOPB | 制造商:Texas Instruments 功能描述:IC PWR MGMT/PROT PMBUS 24WQFN 制造商:Texas Instruments 功能描述:System PWR Mgmt & Protection IC |
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