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| 型号： | MAX16126TCB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/19页 |
| 文件大小： | 0K |
| 描述： | IC LOAD DUMP REV V PROT 12TQFN |
| 标准包装： | 2,500 |
| 应用： | 负载突降，电压保护 |
| 电流 - 电源： | 224µA |
| 电源电压： | 3 V ~ 30 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | * |
| 封装/外壳： | * |
| 供应商设备封装： | * |
| 包装： | * |
MAX16126/MAX16127
Load-Dump/Reverse-Voltage Protection Circuits
Table 1. Summary of ISO7637 Pulses
NAME
Pulse 1
Pulse 2a
Pulse 3a
Pulse 3b
Pulse 4
Pulse 5a
Pulse 5b
DESCRIPTION
Inductive load disconnection
Inductive wiring disconnection
Switching transients
Cold crank
Load dump (unsuppressed)
Load dump (suppressed)
PEAK VOLTAGE (V) (max) *
12V SYSTEM
-100
50
-150
100
-7
-6
87
(Varies, but less than pulse 5a)
DURATION
1ms to 2ms
0.05ms
0.2 F s
100ms (initial)
Up to 20s
400ms (single)
* Relative to system voltage.
? R TOTAL ?
R3 = TH TOTAL
R2 =
(V TH - V TH-HYS ) × R TOTAL
V TRIPLOW = (V TH - V TH-HYS ) ? ?
Refer to the ISO7637-2 specification for details on pulse
waveforms, test conditions, and test fixtures.
Setting Overvoltage and Undervoltage
Thresholds (MAX16126)
The MAX16126 uses an external resistive divider to
set the overvoltage and undervoltage thresholds. The
MAX16126 operates in switch mode in which the internal
overvoltage comparator monitors the input voltage. It
uses three resistors in a single resistive divider to set the
undervoltage and overvoltage thresholds. The top of the
resistive divider connects to TERM (see Figure 1 ).
The MAX16126 includes internal undervoltage and over-
voltage comparators for window detection. GATE is
enhanced and the n-channel MOSFETs are on when
the IN voltage is within the selected window. When the
monitored voltage falls below the lower limit (V TRIPLOW )
or exceeds the upper limit (V TRIPHIGH ) of the window,
the GATE voltage goes to GND, turning off the MOSFETs.
The circuit in Figure 1 shows the MAX16126 enabling the
DC-DC converter when the monitored voltage is in the
selected window.
The resistor values R1, R2, and R3 can be calculated as
follows:
? R TOTAL ?
? R2 + R3 ?
Maxim Integrated
V TRIPHIGH = V TH ? ?
? R3 ?
where R TOTAL = R1 + R2 + R3, V TH is the 1.225V OVSET/
UVSET threshold, V TH-HYS is the hysteresis.
Use the following steps to determine the values for R1,
R2, and R3:
1) Choose a value for R TOTAL , the sum of R1, R2, and R3.
2) Calculate R3 based on R TOTAL and the desired upper
trip point:
V × R
V TRIPHIGH
3) Calculate R2 based on R TOTAL , R3, and the desired
lower trip point:
- R3
V TRIPLOW
4) Calculate R1 based on R TOTAL , R2, and R3:
R1 = R TOTAL - R2 - R3
11
相关PDF资料 |
PDF描述 |
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| MAX16126TCA+T | IC LOAD DUMP REV V PROT 12TQFN |
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| EET-UQ2D821KA | CAP ALUM 820UF 200V 20% SNAP |
| M3CKK-1006J | IDC CABLE - MKC10K/MC10G/MPK10K |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16126TCC+ | 功能描述:监控电路 Load-Dump/Reverse-V Protection Circuits 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 |
| MAX16126TCC+T | 功能描述:监控电路 Load-Dump/Reverse V Protection Circuit 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 |
| MAX16126TCD+ | 功能描述:监控电路 Load-Dump/Reverse-V Protection Circuits 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 |
| MAX16126TCD+T | 功能描述:监控电路 Load-Dump/Reverse V Protection Circuit 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 |
| MAX16127TC+ | 功能描述:监控电路 Load-Dump/Reverse-V Protection Circuits 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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