Infineon ILD1151

The ILD1151 is a Multitopology High Power DC/DC Controller IC with built in protection features. The main function of this device is to regulate a constant LED current. The constant current regulation is especially beneficial for LED color accuracy and longer lifetime. The controller concept of the ILD1151 allows multiple configurations such as Boost, Buck, Buck-Boost, SEPIC and Flyback by simply adjusting the external components. The ILD1151 offers the most flexible dimming options. Dimming can be achieved with analog or PWM input. The switching frequency is adjustable in the range of 100 kHz to 500 kHz and can be synchronized to an external clock source. The ILD1151 features an enable function reducing the shut-down current consumption to Iq_OFF < 10 μA. The current mode regulation scheme of this device provides a stable regulation loop maintained by small external compensation components. The integrated soft start feature limits the current peak as well as voltage overshoot at start-up. This IC provides output overvoltage protection, device overtemperature shutdown and short circuit to GND protection.

• Wide Input Voltage Range from 4.5 V to 45 V
• Constant Current or Constant Voltage Regulation
• Drives LEDs in Boost, Buck, Buck-Boost, SEPIC and Flyback Topology
• Very Low Shutdown Current: Iq_OFF < 10 μA
• Flexible Switching Frequency Range, 100 kHz to 500 kHz
• Synchronization with external clock source
• PWM Dimming PG
• Analog Dimming feature to adjust average LED current
• Internal 5 V Low Drop Out Voltage Regulator
• Open Circuit Detection
• Short to GND Protection
• Output Overvoltage Protection
• Internal Soft Start
• Over Temperature Shutdown
• Wide LED current range via simple adaptation of external components
• 300mV High Side Current Sense to ensure highest flexibility and LED current accuracy
• Available in a small thermally enhanced PG-SSOP-14 package
• Green Product (RoHS) Compliant

• LED Controller for Industrial Applications
• Universal Constant Current and Voltage Source
• General Illumination e.g. Halogen Replacement Residential Architectural and Industrial Commercial Lighting for in- and outdoor
• Signal and Marker Lights for Orientation or Navigation (e.g. steps, exit ways, etc.)