- 您现在的位置：买卖IC网 > PDF目录16185 > NCP346SN1EVB (ON Semiconductor)EVAL BOARD FOR NCP346SN1 PDF资料下载
参数资料
| 型号： | NCP346SN1EVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/15页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR NCP346SN1 |
| 产品变化通告： | Product Obsolescence 21/Jan/2010 |
| 设计资源： | NCP346SN1 Demo Brd BOM NCP346SN1EVB Gerber Files NCP346SN1 Demo Brd Schematic |
| 标准包装： | 1 |
| 主要目的： | 过压防护 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | NCP346 |
| 已供物品： | 板 |
| 其它名称： | NCP346SN1EVBOS |
NCP346
VOV + Vth(1 ) R1 R2 ) R1 Rin).
R2 +
R1
(VOV Vth * R1 Rin * 1)
Design Steps for Adjusting the Overvoltage Threshold
1. Use Typical R in , and V th Values from the Electrical
Specifications
2. Minimize R in Effect by Selecting R 1 << R in since:
(eq. 6)
3. Let X = R in / R 1 = 100.
4. Identify Required Nominal Overvoltage Threshold.
5. Calculate nominal R 1 and R 2 from Nominal Values:
R1 + Rin X (eq. 7)
(eq. 8)
6. Pick Standard Resistor Values as Close as Possible to
these Values
7. Use min/max Data and Resistor Tolerances to
Determine Overvoltage Detection Tolerance:
VOVmin + Vthmin(1 ) R1min R2max ) R1min Rinmax)
(eq. 9)
VOVtyp + Vthtyp(1 ) R1typ R2typ ) R1typ Rintyp)
The specification takes into account the hysteresis of the
comparator, so the minimum input threshold voltage (V th )
is the falling voltage detection point and the maximum is the
rising voltage detection point. One should design the input
supply such that its maximum supply voltage in normal
operation is less than the minimum desired overvoltage
threshold.
8. Use worst case resistor tolerances to determine the
maximum V(V CC ,IN)
V(VCC, IN) min + VCCmax * (R1min (R1min ) R2max))
(eq. 12)
V(VCC, IN)typ + VCCmax * (R1typ (R1typ ) R2typ)) (eq. 13)
V(VCC, IN) max + VCCmax * (R1max (R1max ) R2min))
(eq. 14)
This is shown empirically in Tables 2 through 4.
The following tables show an example of obtaining a 6 V
detection voltage from the NCP346SN2T2, which has a
typical V th of 5.5 V.
(eq. 10)
VOVmax + Vthmax(1 ) R1min R2max ) R1max Rinmin)
(eq. 11)
http://onsemi.com
8
相关PDF资料 |
PDF描述 |
|---|---|
| 383LX103M080A082 | CAP ALUM 10000UF 80V 20% SNAP |
| 383LX152M250A062 | CAP ALUM 1500UF 250V 20% SNAP |
| ESM15DSEP-S243 | CONN EDGECARD 30POS .156 EYELET |
| M3TMK-1606R | IDC CABLE - MSD16K/MC16M/MCG16K |
| 380LX561M400A052 | CAP ALUM 560UF 400V 20% SNAP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP346SN1T1G | 功能描述:监控电路 4.45V Overvoltage Supervisor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| NCP346SN2T1G | 功能描述:监控电路 5.5V Overvoltage Supervisor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| NCP347AE AV51D WAF | 制造商:ON Semiconductor 功能描述: |
| NCP347AI BB58A WAF | 制造商:ON Semiconductor 功能描述: |
| NCP347MTAETBG | 功能描述:电池管理 OVER VLTG PROTECTION RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。