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参数资料
| 型号： | ISPPAC-POWR1208-01TN44I |
| 厂商： | Lattice Semiconductor Corporation |
| 文件页数： | 19/35页 |
| 文件大小： | 0K |
| 描述： | IC ISP POWER MGR ANLG/LOG 44TQFP |
| 标准包装： | 160 |
| 系列： | ispPAC® |
| 应用： | 电源监控器，序列发生器 |
| 输入电压： | 0 V ~ 6 V |
| 电源电压： | 2.7 V ~ 5.5 V |
| 电流 - 电源： | 10mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-LQFP |
| 供应商设备封装： | 44-TQFP（10x10） |
| 包装： | 托盘 |
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Lattice Semiconductor
Figure 1-8. MOSFET Gate Charge vs. Gate-Source Voltage
9
6
3
0
ispPAC-POWR1208 Data Sheet
0
20
40
60
Q G , Total Gate Charge (nC)
Using this method, it becomes straightforward to estimate the gate rise time for a given charging current. As an
example a MOSFET’s source voltage (V S ) will be 3.3V when the device is fully switched on, while the gate voltage
(V G ) will be 10V in this condition. The device’s gate-to-source voltage (V GS ) will therefore be 6.7V. Reading across
and down the plot of Figure 1-8, a V GS of 6.7V corresponds to ~40 nC of gate charge (Q G ). Because charge is
equal to the product of current (I) and time (t CHARGE-TIME ) when current is constant, gate charging time can be
expressed as:
i =
dQ
dt
(1)
t CHARGE-TIME =
Q G
I
(2)
For this example, let us assume a charging current of 10.9μA. Gate charging time is given by:
t CHARGE-TIME =
40 x 10 -9 C
10.9 x 10 -6 A
= 3.7 x 1
(3)
Validation of this result can be seen in the scope plot shown in Figure 1-9. The top set of traces shows gate rise
times for various (5.5μA to 50.3μA) gate drive currents. The trace labeled 10.9μA shows a 0-10V rise time of just
over 3 milliseconds, which agrees to within 25% of our predicted value, well within the limits of device-to-device
variation.
1-18
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISPPAC-POWR1208-01TN44I7R | 制造商:Lattice Semiconductor Corporation 功能描述: |
| ISPPAC-POWR1208P1 | 制造商:LATTICE 制造商全称:Lattice Semiconductor 功能描述:In-System Programmable Power Supply Sequencing Controller and Precision Monitor |
| ISPPACPOWR1208P101T44I | 制造商:Lattice Semiconductor Corporation 功能描述: |
| ISPPAC-POWR1208P1-01T44I | 功能描述:监控电路 PROGRAMMABLE PWR SUPPLY CONTR 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 |
| ISPPAC-POWR1208P1-01TN44I | 功能描述:监控电路 PROGRAMMABLE PWR SUPPLY CONTR 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 |
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