SLUSBL5A February   2015  – June 2019

PRODUCTION DATA.

1. Features
2. Applications
3. Description
1.     Device Images
4. Revision History
5. Pin Configuration and Functions
6. Specifications
7. Detailed Description
1. 7.1 Overview
2. 7.2 Functional Block Diagram
3. 7.3 Feature Description
4. 7.4 Device Functional Modes
8. Application and Implementation
1. 8.1 Application Information
2. 8.2 Typical Application
3. 8.3 Do's and Don'ts
9. Power Supply Recommendations
10. 10Layout
11. 11Device and Documentation Support
1. 11.1 Device Support
1. 11.1.1 Development Support
2. 11.1.2 Device Nomenclature
2. 11.2 Documentation Support
4. 11.4 Community Resources
6. 11.6 Electrostatic Discharge Caution
7. 11.7 Glossary
12. 12Mechanical, Packaging, and Orderable Information

• D|7

#### 7.3.1.5 CBC (Cable Compensation)

The cable compensation pin is connected to a resistor to ground to program the amount of output voltage compensation needed to offset cable resistance. The cable compensation circuit generates a 0 to 3.13-V voltage level on the CBC pin corresponding to 0 A to IOCC maximum output current. The resistance selected on the CBC pin programs a current mirror that is summed into the VS feedback divider therefore increasing the regulation voltage as IOUT increases. There is an internal series resistance of 28 kΩ to the CBC pin which sets a maximum cable compensation for a 5-V output to approximately 400 mV when CBC is shorted to ground. The CBC resistance value can be determined using Equation 1.

Equation 1.

where

• VCBC(max) is the maximum voltage at the cable compensation pin at the maximum converter output current (see Electrical Characteristics),
• VOCV is the regulated output voltage,
• VF is the diode forward voltage,
• VVSR is the CV regulating level at the VS input (see Electrical Characteristics),
• VOCBC is the target cable compensation voltage at the output terminals.

Note that the cable compensation does not change the overvoltage protection (OVP) threshold, VOVP (see Electrical Characteristics), so the operating margin to OVP is less when cable compensation is used.