IS31BL3232-DLS2-TR

IS31BL3232-DLS2-TR is a DC-DC boost controller with integrated LED driver, which is mainly used in PMIC (Power Management IC) - LED drivers applications. This device is based on current mode control, and includes an integrated 1.4MHz Pulse Width Modulation (PWM) controller, a high-side N-MOSFET and an internal ±1.5% current sense amplifier. It is designed to ensure the maximum brightness and reliability of the LED, with as few external components as necessary.

The first application field of IS31BL3232-DLS2-TR is in Automotive Lighting. To provide a safe and reliable driver solution, this device has an in-target HVLED voltage that can be applied to automotive applications, as it is required by the Automotive Safety Integrity Level (ASIL) B standard. Additionally, this device also has a low profile and can work with a low battery voltage ranging from 2.5V to 6V, which makes it ideal for portable applications requiring long battery life.

A key feature of IS31BL3232-DLS2-TR is its integrated LED driver, which can be used to drive up to 24 strings of LED with a total of 74 LEDs. The LED driver has an ultra-fast response time of 200ns and operates at a PWM frequency of 1.4MHz. This gives the device excellent dimming performance and the ability to drive low brightness LED strings down to 0.1mA. The LED driver also has a wide dimming range from 0.1mA to 50mA, with a dimming resolution of 0.1mA.

The working principle of IS31BL3232-DLS2-TR is based on current-mode control (CMC). In CMC, the LED current is regulated by sensing the voltage drop between the current sense resistor and the reference voltage. The output current is then compared with the reference voltage and is adjusted by the PWM controller. The CMC method ensures fast response and excellent regulation performance, making IS31BL3232-DLS2-TR suitable for high brightness LED applications.

To summarise, IS31BL3232-DLS2-TR is a DC-DC boost controller with integrated LED driver which is mainly used in PMIC - LED drivers applications. It features a low profile, a wide dimming range, ultra-fast response time, high-side N-MOSFET, and an internal ±1.5% current sense amplifier. This device is based on current mode control and has an in-target HVLED voltage that makes it ideal for automotive and portable applications.