on September 3th 310

Detailed Analysis and Application Guide for the UCC27517DBVR High Performance Low Side Driver

Catalog

UCC27517DBVR overview

UCC27517DBVR is a high-speed low-side gate driver produced by Texas Instruments, which can drive MOSFET and IGBT power switches. The driver features a wide VDD range of 4.5V to 18V and a wide operating temperature range of 40°C to 140°C. An internal undervoltage lockout (UVLO) circuit on the VDD pin keeps the output low when VDD exceeds the operating range, ensuring stable operation. In addition, this device can operate in a low voltage environment (such as below 5V) and has excellent switching characteristics among similar products. Therefore, it is very suitable for driving newly launched wide bandgap power switching devices such as GaN power semiconductor devices.

The UCC27517DBVR has a unique dual-input design, which allows the same device to be flexibly implemented in inverting (IN- pin) and non-inverting (IN+ pin) configurations. Both the IN+ pin and the IN- pin can be used to control the output status of the driver. Unused input pins can be used to enable and disable functionality. For safety reasons, internal pull-up and pull-down resistors ensure that the output remains low when the input pin is left floating. Therefore, unused input pins should not be left floating but should be appropriately biased to ensure that the driver outputs are enabled and operating properly. The input pin threshold for UCC27517DBVR is engineered to align with TTL and CMOS compatible low-voltage logic circuits, independent of the VDD supply voltage. Moreover, the substantial hysteresis between high and low thresholds enhances the device's noise immunity significantly.

Alternatives and equivalents:

• UCC27517DBVT

• UCC27517ADBVT

• UCC27517ADBVR

Technical parameters of UCC27517DBVR

• The manufacturer of this gate driver is Texas Instruments.

• Its mounting method is SMD or SMT.

• Its power supply voltage is 4.5V to 18V.

• This gate driver has a rise time of 9ns and a fall time of 7ns.

• UCC27517DBVR is available in SOT-23-5 package and tape and reel packaging.

• UCC27517DBVR belongs to the category of gate drivers.

• UCC27517DBVR has a minimum operating supply voltage of 4.5V and a maximum operating supply voltage of 18V.

• The minimum operating temperature of this gate driver is -40°C and the maximum operating temperature is 140°C.

UCC27517DBVR's typical characteristics

What are the advantages of UCC27517DBVR compared with other gate driver ICs?

Built-in protection: In order to protect the switching device and the driver itself, UCC27517DBVR has a variety of built-in protection functions, including short circuit protection, over-voltage protection, over-temperature protection, etc., which can improve the reliability and stability of the system.

High performance: UCC27517DBVR has excellent performance characteristics to meet the needs of a variety of high-frequency and high-power applications. Firstly, it has the ability to work at high frequency and can complete the switching action in a very short time. Secondly, it can withstand high current and voltage to ensure stable operation under high load conditions. In addition, it adopts advanced signal processing technology to accurately recognize and respond to changes in the input signal.

Low input/output error: UCC27517DBVR adopts precise feedback voltage control with low error input and output voltage characteristics, which can accurately control the dynamic characteristics and current distribution of the switching device.

Dual-channel design: The UCC27517DBVR features two independent channels that can simultaneously control two low-end switching devices, providing a high degree of flexibility and co-driving capability.

Low-side driver: The UCC27517DBVR is a low-side driver mainly used for controlling power switching devices, such as MOSFETs and IGBTs, which can quickly drive the low-side of these switching devices by providing a high current capability, thus realizing efficient and stable power control.

Fast switching time: The UCC27517DBVR has a fast switching time, which enables the power switching devices to switch faster, thus reducing the power loss during the switching process.

Low-power design: The UCC27517DBVR adopts an advanced low-power design, which not only has low static power consumption, but also controls dynamic power consumption, thus significantly improving the energy efficiency of the system. Specifically, it reduces the static power consumption by optimizing the internal circuit structure and selecting low-power components, resulting in a significant reduction of the system's energy consumption in the standby or idle state. At the same time, it also utilizes high-speed switching technology and low-impedance design, which makes the charging and discharging process more rapid during the switching process and effectively reduces energy loss.

What applications is the UCC27517DBVR typically used in?

• DC-DC converters

• Solar power, motor control, UPS

• Switched-mode power supplies

• Companion gate-driver devices for digital-power controllers

• Gate driver for emerging wide band-gap power devices (such as GaN)

UCC27517DBVR's package

What is the compatibility of UCC27517DBVR?

The compatibility of UCC27517DBVR depends on the following aspects:

Control signal compatibility: The UCC27517DBVR has good input signal compatibility and can accept input signals from various control circuits. However, we need to make sure that the level and frequency of the input signals are within the chip specifications and can trigger the chip's action normally.

Supply voltage compatibility: The UCC27517DBVR usually operates at lower supply voltages, such as single 5V or dual ±5V. When designing circuits, we need to make sure that the selected supply voltage matches the chip's specifications and is able to provide the required performance within the power supply range.

Application compatibility: The UCC27517DBVR has broad compatibility in a variety of applications, including power conversion, motor control, inverters, and more. However, in specific application scenarios, we may need to consider additional design considerations to ensure that the chip is able to meet specific requirements.

Environmental conditions compatibility: The UCC27517DBVR is able to operate normally under certain environmental conditions, which include temperature, humidity, vibration, etc. The UCC27517DBVR can be used in a variety of applications, including power conversion, motor control, and inverters. However, under special environmental conditions, we may need to take additional protective measures for the circuit to ensure its reliability and stability.

Power semiconductor device compatibility: The UCC27517DBVR is designed to drive power semiconductor devices such as MOSFETs or IGBTs, so when selecting the chip, we need to make sure that it is compatible with the power semiconductor device used and can provide the required matching of characteristics such as current, voltage and speed.

Frequently Asked Questions [FAQ]

1. What is the operating temperature range of UCC27517DBVR?

The operating temperature of UCC27517DBVR ranges from -40°C to 140°C.

2. How does the UCC27517DBVR ensure reliable operation in high-noise environments?

The UCC27517DBVR incorporates features like under-voltage lockout protection and over-temperature protection to enhance reliability in challenging operating conditions.

3. What are the key features of the UCC27517DBVR?

Some key features include dual-channel capability, fast switching speeds, high peak output current, and under-voltage lockout protection.

4. What does a gate driver do?

A gate driver is a power amplifier that accepts a low power input from a controller IC and produces the appropriate high current gate drive for a power device. It is used when a PWM controller cannot provide the output current required to drive the gate capacitance of the associated power device.