Maxim MAX16838双路LED驱动方案 - 消费电子 - 电子工程
The MAX16838 evaluation kit (EV kit) demonstrates the MAX16838 high-brightness LED (HB LED) driver, integrating a step-up DC-DC preregulator followed by two channels of linear current sinks. The step-up preregulator switches at 500kHz and operates as a current-modecontrolled regulator capable of providing up to 300mA for the linear circuits. Each channel is capable of operating up to 33V and provides up to 150mA. The channels are configurable for 100mA or 150mA HB LED output current.
The MAX16838 IC is available in a 20-pin TQFN package with an exposed pad for enhanced thermal power dissipation.
The MAX16838 EV kit operates from a DC supply voltage of 7V up to the HB LED string-forward voltage. The EV kit can withstand a 40V load-dump c12月5日ondition. The EV kit also demonstrates the MAX16838 features, such as adaptive voltage optimization, undervoltage lockout (UVLO), overvoltage protection (OVP), cycle-by-cycle current limit, thermal shutdown, and digital PWM dimming operation using a digital PWM input signal to control the brightness of the HB LEDs.
Input Voltage from 7V Up to HB LED Forwa甚至还出现了一些下滑。这里面固然有受到豪宅入市雷声大雨点小rd Voltage
Demonstrates Overvoltage Protection (35.6V)
HB LED String Output Currents Configurable for 100mA or 150mA
Demonstrates UVLO (6.4V)
Demonstrates Cycle-by-Cycle Current Limit and Thermal Shutdown Features
Demonstrates Adaptive Output-Voltage Optimization
Configurable LED Current Foldback (VIN 6.5V)
Proven PCB and Thermal Design
Fully Assembled and TestedTX品牌