Overview
The UCC27288DR, produced by Texas Instruments, is a high-voltage gate driver designed to drive both the high-side and the low-side N-channel MOSFETs in synchronous buck or half-bridge configurations. This device is particularly robust, allowing it to operate with HS voltages up to 100 V with respect to VSS. It features independent TTL-compatible input signals for each output, enabling flexible control over the MOSFETs. The UCC27288DR also includes undervoltage lockout (UVLO) protection for both the high-side and low-side driver stages, ensuring reliable operation by inhibiting the outputs until sufficient supply voltage is available.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VDD Supply Voltage | -0.3 | - | 20 | V |
| VHI, VLI Input Voltages | -5 | - | 20 | V |
| VHS Voltage on HS | -10 | - | 100 | V |
| Propagation Delay | - | 16 ns | - | ns |
| Rise Time (CLOAD = 1800 pF) | - | 12 ns | - | ns |
| Fall Time (CLOAD = 1800 pF) | - | 10 ns | - | ns |
| Peak Output Current | - | ±3 A | - | A |
| Operating Junction Temperature | -40 | - | 140 | °C |
| VDD UVLO Rising Threshold | 6.5 | 7.0 | 7.8 | V |
Key Features
- Drives two N-channel MOSFETs in high-side low-side configuration.
- 16-ns typical propagation delay and 1-ns typical delay matching.
- 12-ns rise and 10-ns fall time with 1800-pF load.
- Configurable external bootstrap diode.
- 8-V typical undervoltage lockout (UVLO) for both channels.
- Absolute maximum negative voltage handling on inputs (–5 V) and HS (–14 V).
- ±3-A peak output current.
- Inputs are independent of each other and VDD, allowing for flexible control design.
- Robust level shifter with low power consumption and clean level transitions.
- Offered in an SOIC8 package for improved system robustness in harsh environments.
Applications
- Solar power optimizers.
- Merchant network and server power supplies.
- Merchant telecom rectifiers.
- DC input BLDC motor drives.
- Test and measurement equipment.
Q & A
- What is the maximum voltage rating for the switch node (HS) of the UCC27288DR?
The maximum voltage rating for the switch node (HS) is 100 V.
- What is the typical propagation delay of the UCC27288DR?
The typical propagation delay is 16 ns.
- What is the peak output current capability of the UCC27288DR?
The peak output current is ±3 A.
- Does the UCC27288DR have an integrated bootstrap diode?
No, the UCC27288DR does not have an integrated bootstrap diode; an external bootstrap diode is required.
- What is the operating junction temperature range for the UCC27288DR?
The operating junction temperature range is from –40°C to 140°C.
- What type of input signals does the UCC27288DR support?
The UCC27288DR supports TTL-compatible and CMOS type control signals.
- What is the purpose of the undervoltage lockout (UVLO) feature in the UCC27288DR?
The UVLO feature inhibits the outputs until sufficient supply voltage is available to turn on the external MOSFETs, preventing improper operation during low voltage conditions.
- Can the inputs of the UCC27288DR overlap?
Yes, the inputs can overlap, and the outputs will follow the input signals.
- In what package is the UCC27288DR offered?
The UCC27288DR is offered in an SOIC8 package.
- What are some common applications for the UCC27288DR?
Common applications include solar power optimizers, merchant network and server power supplies, merchant telecom rectifiers, DC input BLDC motor drives, and test and measurement equipment.
