ZHCSLJ7A June 2021 – June 2021 LM5146
PRODUCTION DATA
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 Revision History
- 5 說明（續(xù)）
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Input Range (VIN)
- 8.3.2 Output Voltage Setpoint and Accuracy (FB)
- 8.3.3 High-Voltage Bias Supply Regulator (VCC)
- 8.3.4 Precision Enable (EN/UVLO)
- 8.3.5 Power Good Monitor (PGOOD)
- 8.3.6 Switching Frequency (RT, SYNCIN)
- 8.3.7 Configurable Soft Start (SS/TRK)
- 8.3.8 Voltage-Mode Control (COMP)
- 8.3.9 Gate Drivers (LO, HO)
- 8.3.10 Current Sensing and Overcurrent Protection (ILIM)
- 8.3.11 OCP Duty Cycle Limiter
- 8.4 Device Functional Modes
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
封裝選項
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RGY|20
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RGY|20
訂購信息
8.3.6.1 Frequency Adjust
Adjust the free-running switching frequency by using a resistor from the RT pin to AGND. The switching frequency range is from 100 kHz to 1 MHz. The frequency set resistance, RRT, is governed by Equation 3. E96 standard-value resistors for common switching frequencies are given in Table 8-1.
Equation 3. 
Table 8-1 Frequency Set Resistors
| SWITCHING FREQUENCY (kHz) | FREQUENCY SET RESISTANCE (kΩ) |
|---|---|
| 100 | 100 |
| 200 | 49.9 |
| 250 | 40.2 |
| 300 | 33.2 |
| 400 | 24.9 |
| 500 | 20 |
| 750 | 13.3 |
| 1000 | 10 |