Overview
The TPS2817DBVR is a single-channel high-speed MOSFET driver from Texas Instruments, part of the TPS28xx family. This device is designed to deliver peak currents of up to 2 A into highly capacitive loads, making it suitable for driving power MOSFETs in various applications. The TPS2817DBVR features a noninverting driver configuration with an active pullup circuit on the input, eliminating the need for external pullup resistors when used with open-collector PWM controllers. It operates over a wide supply voltage range of 14 V to 40 V and includes an on-board series regulator that can supply approximately 20 mA of current at 11.5 V, which can be used to power other circuits.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage Range | VDD | 14 | - | 40 | V |
| Output Voltage (Regulator) | 14 ≤ VDD ≤ 40 V, 0 ≤ IO ≤ 20 mA | 10 | 11.5 | 13 | V |
| High-Level Output Voltage | IO = –1 mA | 9.75 | 9.9 | - | V |
| Low-Level Output Voltage | IO = 1 mA | 0.18 | 0.25 | - | V |
| Input Current | Input = 0 V or VCC | 650 | - | 1000 | µA |
| Input Capacitance | - | - | 5 | 10 | pF |
| Propagation Delay Time (High-to-Low) | VCC = 10 V | 24 | - | 45 | ns |
| Propagation Delay Time (Low-to-High) | VCC = 10 V | 24 | - | 45 | ns |
| Ambient Temperature Range | - | -40 | - | 125 | °C |
| Package Type | - | - | - | 5-pin SOT-23 (DBV) | - |
Key Features
- High-Speed Operation: Capable of delivering peak currents of up to 2 A into highly capacitive loads.
- Active Pullup Circuit: Eliminates the need for external pullup resistors when used with open-collector PWM controllers.
- On-Board Series Regulator: Supplies approximately 20 mA of current at 11.5 V, which can be used to power other circuits.
- Low Quiescent Current: Devices like TPS2828 and TPS2829 have quiescent currents of less than 15 µA when inputs are high or low.
- CMOS Logic Compatibility: Switches at standard CMOS logic levels, with positive-going input levels at approximately 2/3 VCC and negative-going input levels at approximately 1/3 VCC.
- BiCMOS Output Stage: Provides high instantaneous drive current and very low drop to each rail, ensuring proper operation at voltage extremes.
- Wide Operating Temperature Range: Operates over an ambient temperature range of –40°C to 125°C.
Applications
- Power Supply Systems: Suitable for use in DC-DC converters, including step-down (buck) converters and boost converters.
- Motor Control: Can be used to drive power MOSFETs in motor control circuits.
- High-Frequency Switching Applications: Ideal for applications requiring fast switching times and high drive currents.
- Low-Power Circuits: The TPS2828 and TPS2829 variants are suitable for low-voltage circuits that require very low quiescent currents.
Q & A
- What is the peak current capability of the TPS2817DBVR?
The TPS2817DBVR can deliver peak currents of up to 2 A into highly capacitive loads.
- What is the purpose of the active pullup circuit in the TPS2817DBVR?
The active pullup circuit eliminates the need for external pullup resistors when using open-collector PWM controllers.
- What is the output voltage range of the on-board series regulator?
The on-board series regulator supplies approximately 20 mA of current at 11.5 V.
- What is the quiescent current of the TPS2817DBVR when inputs are high or low?
The quiescent current is typically around 650 µA when the input is low and 15 µA when the input is high for the TPS2817DBVR. However, for devices like TPS2828 and TPS2829, it is less than 15 µA.
- What is the operating temperature range of the TPS2817DBVR?
The device operates over an ambient temperature range of –40°C to 125°C.
- What package type is the TPS2817DBVR available in?
The TPS2817DBVR is available in a 5-pin SOT-23 (DBV) package.
- How does the BiCMOS output stage benefit the operation of the TPS2817DBVR?
The BiCMOS output stage provides high instantaneous drive current and very low drop to each rail, ensuring proper operation at voltage extremes.
- Can the TPS2817DBVR be used in low-power circuits?
While the TPS2817DBVR itself is not optimized for very low quiescent currents, variants like the TPS2828 and TPS2829 are more suitable for low-power circuits.
- What are the typical propagation delay times for the TPS2817DBVR?
The propagation delay times are typically around 24 to 45 ns for both high-to-low and low-to-high transitions.
- How should the on-board series regulator be used in applications?
An electrolytic output capacitor of 4.7 µF or larger is recommended for the on-board series regulator. A 0.1-µF ceramic capacitor on the input of the regulator can help suppress transient currents.
