Infineon Technologies ILD6150 | Demoboard 60 V buck LED driver IC

Description

The ILD6150 is a hysteretic buck LED driver IC for driving high power LEDs in general lighting applications with average currents up to 1.5 A.The ILD6150 is suitable for LED applications with a wide range of supply voltages from 4.5 V to 60 V. The enable signal can be used to activate the standby mode. A multifunctional PWM input signal allows dimming of the LEDs with an analog DC voltage or an external PWM signal. To minimize colorshifts of the LEDs an analog PWM voltage is converted to an internal 1.6 kHz PWM signal modulating the LED current.The ILD6150 incorporates an undervoltage lock-out that will shut down the IC when the minimum supply voltage threshold is exceeded. The over-current protection turns off the output stage once the output current exceeds the current threshold. An integrated over-temperature protection circuit will start to reduce the LED current by internal PWM modulation once the adjustable junction temperature threshold of the IC is exceeded. Realizing a thermal coupling between LED driver and LEDs this feature eliminates the need of external temperature sensors as NTCs or PTCs.Thanks to the hysteretic concept the current control is extremely fast and always stable. A maximum contrast ratio of 3000:1 can be achieved depending of the dimensioning of the external components. The efficiency of the LED driver is remarkable high, reaching up to 98% of efficiency over a wide range. The output current accuracy from device to device and under all load conditions and over temperature is limited to a minimum, making ILD6150 the perfect fit for LED ballasts.

Features

• Wide input voltage range from 4.5 V to 60 V
• Capable to provide up to 1.5 A average output current
• Up to 1 MHz switching frequency
• Soft-start capability
• Separate enable and PWM dimming pins
• Analog and PWM dimming possible
• Integrated PWM generator for analog dimming input
• Typical 3% output current accuracy
• Very low LED current drift over temperature
• Adjustable over-temperature protection
• Undervoltage lockout
• Over-current protection
• Thermally optimized package: PG-DSO-8-27
• Wide input voltage range from 4.5 V to 60 V
• Capable to provide up to 0.7 A average output current
• Up to 1 MHz switching frequency
• Soft-start capability
• Separate enable and PWM dimming pins
• Analog and PWM dimming possible
• Integrated PWM generator for analog dimming input
• Typical 3% output current accuracy
• Very low LED current drift over temperature
• Adjustable over-temperature protection
• Undervoltage lockout
• Over-current protection
• Thermally optimized package: PG-DSO-8-27

NoteL1 100µH ,12 x 12 mm, EPCOS Shielded Power InductorRefer page 22 of datasheet for different inductor value depending on number of leds

Typical applications

• Retail, office and residential downlights,Street and tunnel lighting
• LED driver for general lighting, LED ballasts

More information

• Datasheet
• IC product information