ZXLD1350ET5 30V LED Driver, Internal Switch, 350mA, SMD

The ZXLD1350ET5 from Diodes Inc. is a highly efficient, surface-mount LED driver designed for reliable and precise control of lighting systems. It integrates a hysteretic mode inductive step-down (buck) converter, which operates from a wide input voltage range of 7V to 30V to efficiently drive single or multiple series-connected LEDs with an externally adjustable output current of up to 350mA. Its simple, low-parts-count design simplifies circuit implementation while maintaining high performance.

A key feature is the integrated 30V NDMOS switch and internal PWM filter, contributing to a compact and robust solution. The device offers exceptional efficiency of up to 95%, ensuring minimal power loss and reduced thermal management requirements. It also provides a 40V transient capability for enhanced durability in demanding electrical environments. Output current accuracy is typically within 4%, ensuring consistent and reliable LED brightness.

Control and Functionality

The output current can be finely adjusted using either a DC voltage or a PWM waveform, with PWM control enabling a wide 100:1 adjustment range. Applying a voltage of 0.2V or lower to the ADJ pin turns the output off, switching the device into a low-current standby state for improved energy savings. The device is qualified to the stringent AEC-Q100 Grade 2 standard, making it suitable for automotive and other high-reliability applications.

Technical Specifications

• Topology: Buck Converter
• Input Voltage Range: 7V to 30V
• Maximum Output Voltage: 30V
• Maximum Output Current: 350mA (adjustable)
• Typical Switching Frequency: 1MHz
• Mounting Type: Surface Mount (SMD)
• Package / Case Style: TSOT-23
• Pin Count: 5 Pins
• Operating Temperature Range: -40°C to +105°C
• Number of Outputs: 1
• Dimensions: 33mm (Width) x 43mm (Height) x 15mm (Depth)
• Weight: 12 grams