LM5145 datasheet(45/73 Pages) TI2

tên linh kiện	LM5145

Giải thích chi tiết về linh kiện	LM25137 4V to 42V, 100% Duty Cycle Capable, Dual-Channel, Synchronous Buck DC/DC Controller

PDF	73 Pages

Scroll/Zoom	100%

nhà sản xuất	TI2 [Texas Instruments]

Trang chủ	https://www.ti.com

Logo

45 / 73 page

(43)

8.2.1.2.9 Compensation Components

Choose compensation components for a stable control loop using the procedure outlined as follows.

1. Based on the target loop crossover frequency, fC, of 60kHz, use Equation 44 to calculate RCOMP1, assuming

an effective output capacitance of 128µF. Select RCOMP1 equal to 10kΩ.

(44)

2. Calculate CCOMP1 to create a zero at the higher of (1) one tenth of the crossover frequency, or (2) the load

pole. Select a capacitor value for CCOMP1 of 3.3nF. In general, set the time constant of RCOMP1 and CCOMP1

at approximately 25µs to maintain a fast settling time of the output voltage following a load transient.

(45)

3. Calculate CHF1 to create a pole at the lower of the ESR zero frequency or at half switching frequency (to

attenuate high-frequency noise). Select a capacitor value for CHF1 of 68pF.

(46)

Note

Set a high loop crossover frequency with high RCOMP and low CCOMP values to improve the large-

signal response when recovering from operation in dropout.

www.ti.com

LM25137

SNVSCU4 – OCTOBER 2025

Submit Document Feedback

Product Folder Links: LM25137

LM5145 bảng dữ liệu(PDF) 45 Page - Texas Instruments