Overview
The ADuM4121-1ARIZ, produced by Analog Devices Inc., is a high-voltage, isolated gate driver designed to provide precision isolation and reliable control over the switching characteristics of insulated gate bipolar transistors (IGBTs) and MOSFETs. This device employs Analog Devices' iCoupler technology, ensuring robust and accurate signal transmission across the isolation barrier. The ADuM4121-1 features an internal Miller clamp, which reduces the risk of Miller capacitance-induced turn-on, and includes under-voltage lockout (UVLO) protections for both the primary and secondary sides of the device.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | 2 | A |
| Primary Side Supply Voltage (VDD1) | 2.5 to 6.5 | V |
| Secondary Side Supply Voltage (VDD2) | 10 to 35 | V |
| Propagation Delay (tDLH, tDHL) | Typically 100 ns | ns |
| Under-Voltage Lockout (UVLO) Thresholds | Varying options for secondary side, primary side common among all models | V |
| Isolation Voltage | Up to 5 kVrms for 1 minute | Vrms |
| Output Resistance (RSW) | Approximately 1.5 Ω | Ω |
Key Features
- Internal Miller Clamp: Reduces the risk of Miller capacitance-induced turn-on.
- Under-Voltage Lockout (UVLO): Protects both the primary and secondary sides of the device.
- Precision Isolation: Utilizes Analog Devices' iCoupler technology for robust signal transmission.
- High Output Current: Capable of driving up to 2 A.
- Thermal Shutdown Option: Can be enabled or disabled based on application requirements.
- Low Propagation Delay: Typically 100 ns, ensuring fast and accurate switching.
Applications
The ADuM4121-1 is typically used in high-voltage applications requiring precise control over IGBTs and MOSFETs, such as:
- Power supplies and DC-DC converters.
- Motor control systems.
- Industrial automation and control systems.
- Renewable energy systems, including solar and wind power.
- High-reliability industrial and medical equipment.
Q & A
- What is the maximum output current of the ADuM4121-1?
The ADuM4121-1 can drive up to 2 A.
- What is the purpose of the internal Miller clamp in the ADuM4121-1?
The internal Miller clamp reduces the risk of Miller capacitance-induced turn-on.
- What are the primary side supply voltage ranges for the ADuM4121-1?
The primary side supply voltage ranges from 2.5 V to 6.5 V.
- What is the typical propagation delay of the ADuM4121-1?
The typical propagation delay is around 100 ns.
- Does the ADuM4121-1 have under-voltage lockout protection?
Yes, it has UVLO protections for both the primary and secondary sides.
- What is the isolation voltage rating of the ADuM4121-1?
The ADuM4121-1 is rated for up to 5 kVrms for 1 minute.
- Can the thermal shutdown feature be enabled or disabled on the ADuM4121-1?
Yes, the thermal shutdown feature can be enabled or disabled based on application requirements.
- What type of technology does the ADuM4121-1 use for isolation?
The ADuM4121-1 uses Analog Devices' iCoupler technology for precision isolation.
- In what types of applications is the ADuM4121-1 typically used?
It is used in high-voltage applications such as power supplies, motor control systems, industrial automation, and renewable energy systems.
- How does the ADuM4121-1 handle output load characteristics?
The output signals depend on the characteristics of the output load, typically an N-channel MOSFET, and can be modeled using parameters such as switch output resistance, inductance, gate resistance, and gate to source capacitance.
