ZHCSPA4 march 2023 TPS548C26
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Internal VCC LDO and Using an External Bias on VCC and VDRV Pin
- 7.3.2 Input Undervoltage Lockout (UVLO)
- 7.3.3 Set the Output Voltage
- 7.3.4 Differential Remote Sense and Feedback Divider
- 7.3.5 Start-up and Shutdown
- 7.3.6 Loop Compensation
- 7.3.7 Set Switching Frequency and Operation Mode
- 7.3.8 Switching Node (SW)
- 7.3.9 Overcurrent Limit and Low-side Current Sense
- 7.3.10 Negative Overcurrent Limit
- 7.3.11 Zero-Crossing Detection
- 7.3.12 Input Overvoltage Protection
- 7.3.13 Output Undervoltage and Overvoltage Protection
- 7.3.14 Overtemperature Protection
- 7.3.15 Power Good
- 7.4 Device Functional Modes
- 8 Application and Implementation
- 9 Device and Documentation Support
- 10Mechanical, Packaging, and Orderable Information
7.4.3 Powering the Device from a 12-V Bus
The device works well when powering from a 12-V bus with a single VIN configuration. As a single VIN configuration, the internal LDO is powered by the 12-V bus and generates 4.5-V output to bias the internal analog circuitry and also powers up the gate drives. The VIN input range under this configuration is 4 V to 16 V for up to 35-A load current. Figure 7-1 shows an example for this single VIN configuration.
VIN and EN are the two signals to enable the part. For start-up sequence, any sequence between the VIN and EN signals can power the device up correctly.
Figure 7-1 Single VIN
Configuration with 12-V Bus