SLUSFU6 September 2025 UCC27834-Q1
PRODMIX
- 1
- 1 Features
- 2 Applications
- 3 Description
- 4 Pin Configuration and Functions
- 5 Specifications
- 6 Detailed Description
-
7 Application and Implementation
- 7.1 Application Information
- 7.2
Typical Application
- 7.2.1 Design Requirements
- 7.2.2
Detailed Design Procedure
- 7.2.2.1 Selecting HI and LI Low Pass Filter Components (RHI, RLI, CHI, CLI)
- 7.2.2.2 Selecting Bootstrap Capacitor (CBOOT)
- 7.2.2.3 Selecting VDD Bypass Capacitor (CVDD)
- 7.2.2.4 Selecting Bootstrap Resistor (RBOOT)
- 7.2.2.5 Selecting Gate Resistor RON/ROFF
- 7.2.2.6 Selecting Bootstrap Diode
- 7.2.2.7 Estimate the UCC278X4-Q1 Power Losses
- 7.2.3 Application Curves
- 7.3 Power Supply Recommendations
- 7.4 Layout
- 8 Device and Documentation Support
- 9 Revision History
- 10Mechanical, Packaging, and Orderable Information
4 Pin Configuration and Functions
Figure 4-1 D Package8-Pin SOICTop ViewTable 4-1 Pin Functions
| PIN | I/O | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| VSS | 7 | – | Ground reference for inputs, VDD, and LO driver return |
| HB | 2 | I | High side floating supply. Bypass this pin to HS with a suitable capacitor to sustain bootstrap circuit operation, typically 10 times larger than the MOSFET effective gate capacitance. |
| HI | 5 | I | Logic input for high-side driver. If HI is unbiased or floating, HO is held low |
| HO | 3 | O | High-side driver output. |
| HS | 4 | – | Return for high-side floating supply. |
| LI | 6 | I | Logic input for low-side driver. If LI is unbiased or floating, LO is held low. |
| LO | 8 | O | Low-side driver output. |
| VDD | 1 | P | Bias supply input. Power supply for the input logic side of the device and also low-side driver output. Bypass this pin to VSS with a 1μF SMD capacitor (typically CVDD needs to be 10 × CBOOT). |