ZHCSD24B October 2014 – June 2024 TPS61169
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 說明
- 4 Pin Configuration and Functions
- 5 Specifications
- 6 Detailed Description
- 7 Application and Implementation
- 8 Device and Documentation Support
- 9 Revision History
- 10Mechanical, Packaging, and Orderable Information
6.3.4 Current Program
The FB voltage is regulated by a low 204mV reference voltage. The LED current is programmed externally using a current-sense resistor in series with the LED string(s). The value of the RSET is calculated using:
Equation 1. 
where
- ILED = total output current of LED string(s)
- VFB = regulated voltage of FB pin
- RSET = current sense resistor
The output current tolerance depends on the FB accuracy and the current sensor resistor accuracy.