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The MAX14922 is a high-side, n-channel FET controller for implementing industrial high-side switches for switching ground-connected loads. The MAX14922 device controls an external nMOS power transistor, allowing low RON high-side switch applications from a +9V to +70V supply range. Fast inductive load turn-off can be achieved with use of a high-voltage TVS diode enabling up to -70V (max) voltage clamping. Ground-connected TVS diodes allow clamping of exceptionally high inductive energies. Load current is limited to a user-defined value through a sense resistor. External FET overload protection is achieved using an auto-retry timing feature, as defined by a user-selected capacitor (CBLANK at tBLANK input) or optionally using an external timing control. The MAX14922 features an on-chip comparator enabling monitoring of the high-side switch output or the supply input voltage with a user-selected threshold. An integrated charge pump enables high speed switching rates when using low RON FETs in the 20kHz to 50kHz range. The MAX14922 is available in a 3mm x 3mm, 16-TQFN package. The MAX14922 device is specified over the -40°C to +125°C operating temperature range.
主要特征
- +9V to +70V Operating Supply Range
- 5V / 50mA Integrated Linear Regulator
- -40°C to +125°C Ambient Temperature Operating Range
- 16-TQFN Package, 3mm x 3mm, 0.5mm Pin Pitch
- Robust Design Features
- Ultra High-Speed Inductive Load Turn-Off by Clamping to -70V
- Supply Independent Inductive Clamping
- Support of Low RON FETs Having Qg (Total) = 50nC
- External FET Turn-On Propagation Delay < 20μs
- Active Current Limit Control During Overcurrent
- Fault Monitoring Diagnostic Features
- Overcurrent Detect Output
- High Supply-Voltage Indication
- Flexible Supply or Load Voltage Monitor
- Undervoltage Lockout
- Thermal Warning and Shutdown Protection
- Device Ready Indication
应用/用途
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Parametric specs for Digital I/O
| Digital Input/Output | Digital Output |
| Interface Type | CMOS |
| # Channels | 1 |
| VSUPPLY (V) (min) | 9 |
| VSUPPLY (V) (max) | 70 |
| ISUPPLY (µA) (typ) | 1.8 |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | TQFN-CU/16 |
| Budgetary Price (See Notes) | $1.88 @1k |
查看更多
技术文档
| 数据资料 | High-Side Switch Controller with Current Limiting | Jun 30, 2020 |
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描述
The MAX14922 evaluation kit (EV kit) provides a proven design to evaluate the MAX14922 industrial-grade high- side switch controller for ground connected resistive, inductive, and capacitive loads with diagnostics.
The MAX14922 EV kit must be powered from an external +24V power supply and can draw more than 10A when fully loaded.
The EV kit PCB comes with the MAX14922ATE+ (16 TQFN, 3mm x 3mm) device installed, and includes Si7322DN, n-channel FET and PCB space for a power FET in a TO-252/DPAK/SOT428 package, enabling easy and simple evaluation of the device with loads.
查看详情特征
- Robust Operation with Wide Range of Input Voltages and Load Conditions
- Safety and Protection Device Included for +24V Supply Evaluation with Up To ±1.2kV IEC 61000-4-5 at Source to Ground
- Fast Inductive Load Demagnetization
- LED Indication of Status and Fault Conditions • Overvoltage
- Overcurrent
- Ready
- Thermal warning Fault Condition Indication
- Included Si7322DN FET with Placement Option to Include TO-252 Package FETs
- Autoretry Option Using a tBLANK Feature During Overcurrent Conditions
- Optional On-Chip +5V Logic from MAX14922
- +2.5V to +5.5V Wide Logic-Voltage Range
- Proven PCB Layout
- Fully Assembled and Tested
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参量
Parametric specs for Digital I/O
| Digital Input/Output | Digital Output |
| Interface Type | CMOS |
| # Channels | 1 |
| VSUPPLY (V) (min) | 9 |
| VSUPPLY (V) (max) | 70 |
| ISUPPLY (µA) (typ) | 1.8 |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | TQFN-CU/16 |
| Budgetary Price (See Notes) | $1.88 @1k |
主要特征
- +9V to +70V Operating Supply Range
- 5V / 50mA Integrated Linear Regulator
- -40°C to +125°C Ambient Temperature Operating Range
- 16-TQFN Package, 3mm x 3mm, 0.5mm Pin Pitch
- Robust Design Features
- Ultra High-Speed Inductive Load Turn-Off by Clamping to -70V
- Supply Independent Inductive Clamping
- Support of Low RON FETs Having Qg (Total) = 50nC
- External FET Turn-On Propagation Delay < 20μs
- Active Current Limit Control During Overcurrent
- Fault Monitoring Diagnostic Features
- Overcurrent Detect Output
- High Supply-Voltage Indication
- Flexible Supply or Load Voltage Monitor
- Undervoltage Lockout
- Thermal Warning and Shutdown Protection
- Device Ready Indication
应用/用途
- null
- null
- null
- null
描述
The MAX14922 is a high-side, n-channel FET controller for implementing industrial high-side switches for switching ground-connected loads. The MAX14922 device controls an external nMOS power transistor, allowing low RON high-side switch applications from a +9V to +70V supply range. Fast inductive load turn-off can be achieved with use of a high-voltage TVS diode enabling up to -70V (max) voltage clamping. Ground-connected TVS diodes allow clamping of exceptionally high inductive energies. Load current is limited to a user-defined value through a sense resistor. External FET overload protection is achieved using an auto-retry timing feature, as defined by a user-selected capacitor (CBLANK at tBLANK input) or optionally using an external timing control. The MAX14922 features an on-chip comparator enabling monitoring of the high-side switch output or the supply input voltage with a user-selected threshold. An integrated charge pump enables high speed switching rates when using low RON FETs in the 20kHz to 50kHz range. The MAX14922 is available in a 3mm x 3mm, 16-TQFN package. The MAX14922 device is specified over the -40°C to +125°C operating temperature range.
技术文档
| 数据资料 | High-Side Switch Controller with Current Limiting | Jun 30, 2020 |
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