IS31BL3508B-STLS2-TR

The IS31BL3508B-STLS2-TR is a Pulse Width Modulation (PWM) LED Driver IC from ISSI (Integrated Silicon Solution, Inc.). It is an LED Driver IC specifically designed for LED string lighting and architectural lighting applications, such as LED backlighting, cabinet lighting, cove lighting, and ambient lighting. The driver includes an input port for controlling the dimming level, enabling analog or digital dimming capability. It is capable of driving up to 20 outputs for LED strings with 6, 12, or 24 current sources. The IS31BL3508B-STLS2-TR supports both Constant Current (CC) and Constant Voltage (CV) operation in a single chip, and offers both dimming and color mixing capabilities.

The IS31BL3508B-STLS2-TR operates in two modes: the Constant Current mode and the Constant Voltage mode. In the Constant Current mode, the driver provides a constant current to all of the outputs. In the Constant Voltage mode, the driver provides a constant voltage to each output, thus enabling the user to set the voltage value to control the brightness of each LED string. This flexibility allows the user to mix and match different types of LEDs and set the brightness of each LED string separately. In addition, the driver can be used to control the color of LEDs, by allowing the user to vary the voltage and current for each of the outputs.

The IS31BL3508B-STLS2-TR features a wide output voltage range (4.5V to 24V), allowing for the use of a variety of LED strings. It features advanced protection features, such as over-voltage protection, over-temperature protection, and current limiting, to protect the DC-DC converter and the LED strings. It also offers various current settings, allowing the user to adjust the current output to match the LED string requirements.

The IS31BL3508B-STLS2-TR supports both analog and digital dimming. In the analog dimming mode, the LED string current can be adjusted by applying a variable-amplitude analog signal via the PWM input port. In the digital dimming mode, the PWM input can be used to adjust the duty cycle of the PWM signal, thereby controlling the LED string current. Both modes offer smooth dimming without flicker.

The IS31BL3508B-STLS2-TR also offers integrated current and voltage monitoring. It allows the user to monitor the current and voltage of each output and adjust the current or voltage as needed. This enables the user to ensure the safe operation of the LED strings.

In conclusion, the IS31BL3508B-STLS2-TR is an ideal LED Driver IC for LED string lighting and architectural lighting applications. With its wide output voltage range, advanced protection features, and integrated current and voltage monitoring capabilities, it provides an excellent solution for driving LED strings with its dimming and color mixing capabilities.