Overview
The ADUM4121BRIZ, produced by Analog Devices Inc., is a 2 A isolated, single-channel driver that utilizes Analog Devices' iCoupler® technology to provide precision isolation. This device is designed to control the switching characteristics of insulated gate bipolar transistors (IGBTs) and MOSFET configurations over a wide range of switching voltages. The ADUM4121BRIZ features an internal Miller clamp, under-voltage lockout (UVLO) protections, and optional thermal shutdown, ensuring reliable and efficient operation in various power management applications.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Isolation Voltage | Maximum voltage that can be applied across the isolation barrier | 5 kVrms |
| Output Current | Maximum output current capability | 2 A |
| Primary Side Supply Voltage (VDD1) | Operating voltage range for the primary side | 2.5 V to 6.5 V |
| Secondary Side Supply Voltage (VDD2) | Operating voltage range for the secondary side | 10 V to 30 V |
| Propagation Delay (tDLH, tDHL) | Time between input and output transitions | Typically 75 ns (tDLH), 75 ns (tDHL) |
| Under-Voltage Lockout (UVLO) | Threshold voltages for primary and secondary sides | Varying thresholds, see Table 12 in datasheet |
| Thermal Shutdown | Optional feature to protect against overheating | Enabled or disabled depending on model |
Key Features
- Precision Isolation: Utilizes iCoupler technology for high isolation voltage up to 5 kVrms.
- Internal Miller Clamp: Reduces the chance of Miller capacitance induced turn-on.
- Under-Voltage Lockout (UVLO): Protects against low voltage conditions on both primary and secondary sides.
- Optional Thermal Shutdown: Prevents overheating, with the option to enable or disable this feature.
- High Output Current: Capable of driving up to 2 A, suitable for IGBT and MOSFET configurations.
Applications
- Digital Power System Management: Ideal for high-side switch and MOSFET driver applications.
- Power Monitors and Control: Used in energy monitors, current limit switches, and hot swap controllers.
- Power-over-Ethernet (PoE) Interface Controllers: Suitable for PoE and other power management systems.
- Supervisory Circuits and Protection: Employed in surge stopper, overvoltage, and overcurrent protection circuits.
Q & A
- What is the maximum isolation voltage of the ADUM4121BRIZ?
The maximum isolation voltage is 5 kVrms.
- What is the output current capability of the ADUM4121BRIZ?
The device can drive up to 2 A.
- What is the primary side supply voltage range for the ADUM4121BRIZ?
The primary side supply voltage range is from 2.5 V to 6.5 V.
- Does the ADUM4121BRIZ have under-voltage lockout protection?
Yes, it has UVLO protections for both the primary and secondary sides.
- Is thermal shutdown optional on the ADUM4121BRIZ?
Yes, thermal shutdown can be enabled or disabled depending on the model.
- What is the purpose of the internal Miller clamp in the ADUM4121BRIZ?
The internal Miller clamp reduces the chance of Miller capacitance induced turn-on.
- What are typical applications of the ADUM4121BRIZ?
Typical applications include digital power system management, power monitors and control, and supervisory circuits.
- How does the ADUM4121BRIZ handle propagation delay?
The propagation delay (tDLH, tDHL) is typically around 75 ns.
- Can the ADUM4121BRIZ be used in high-side switch applications?
Yes, it is suitable for high-side switch and MOSFET driver applications.
- What is the significance of iCoupler technology in the ADUM4121BRIZ?
iCoupler technology provides high precision isolation up to 5 kVrms.
