Overview
The UCD7201PWPR, produced by Texas Instruments, is a digital control compatible dual low-side ±4 Amp MOSFET driver. It is part of the UCD7K family of drivers designed for applications that utilize digital control techniques or require fast local peak current limit protection. This device is particularly useful in power stages of double-ended topologies, allowing digital power controllers like the UCD9110 or UCD9501 to interface with the power stage effectively. The UCD7201 features cycle-by-cycle current limit protection, a programmable current limit threshold, and a digital output current limit flag, which can be monitored by the host controller to manage overcurrent conditions.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VDD) | 4.25 | 12 | 14.5 | V |
| Output Gate Drive Current (IOUT) | -4.0 | 4.0 | A | |
| Propagation Delay from IN to OUT (tD) | 20 | 35 | ns | |
| Rise and Fall Times (tR, tF) | 10 | 20 | ns | |
| Operating Junction Temperature | -40 | 105 | °C | |
| Supply Current (IDD) | 1.5 | 2.5 | mA | |
| UVLO Threshold | 4.25 | 4.5 | 4.75 | V |
Key Features
- Dual ±4-A high-current MOSFET gate drivers using TrueDrive™ architecture
- Programmable current limit protection with adjustable threshold (0.25 V to 1.0 V)
- Digital output current limit flag for monitoring by the host controller
- 3.3-V, 10-mA internal linear regulator for powering digital controllers
- DSP/μC compatible inputs with high impedance and internal Schmitt Trigger comparator
- Fast cycle-by-cycle current limit protection
- 10-ns typical rise and fall times with 2.2-nF loads
- 20-ns input-to-output propagation delay
- 25-ns current sense-to-output propagation delay
- 4.5-V to 15-V supply voltage range
- Rated from -40°C to 105°C operating temperature range
Applications
- Digitally controlled power supplies
- DC/DC converters
- Motor controllers
- Line drivers
Q & A
- What is the UCD7201PWPR used for?
The UCD7201PWPR is used as a dual low-side ±4 Amp MOSFET driver in applications requiring digital control and fast local peak current limit protection.
- What is the TrueDrive™ architecture in the UCD7201?
The TrueDrive™ architecture delivers rated current into the gate of a MOSFET during the Miller plateau region of the switching transition, ensuring high current drive when needed.
- What is the range of the programmable current limit threshold?
The programmable current limit threshold can be set to any value between 0.25 V and 1.0 V.
- What is the purpose of the digital output current limit flag?
The digital output current limit flag (CLF) is used to indicate when a current limit event occurs, allowing the host controller to apply the appropriate algorithm to manage the current limit profile.
- What is the operating temperature range of the UCD7201?
The UCD7201 operates over a temperature range of -40°C to 105°C.
- What is the supply voltage range for the UCD7201?
The supply voltage range is from 4.5 V to 15 V.
- What type of inputs does the UCD7201 support?
The UCD7201 supports high impedance digital inputs compatible with 3.3-V logic level signals up to 2 MHz.
- What is the role of the 3.3-V internal linear regulator?
The 3.3-V internal linear regulator provides power to the digital controller and can source up to 10 mA of current.
- What are some typical applications of the UCD7201?
Typical applications include digitally controlled power supplies, DC/DC converters, motor controllers, and line drivers.
- How does the UCD7201 protect against overcurrent conditions?
The UCD7201 protects against overcurrent conditions through cycle-by-cycle current limit protection and a digital output current limit flag that can be monitored by the host controller.
