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| ILD6150 60V 1.5A高效降壓LED驅動方案 |
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| 文章來源： 更新時間：2015/1/13 18:02:00 |
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Infineon公司的ILD6150是60V/1.5A高效降壓LED驅動器,電源電壓從4.5V到60V,開關頻率高達1MHz,軟起動功能,模擬和PWM調光,輸出電流精度3%,LED電流溫度漂移很低,效率高達98%,主要用在通用照明的LED驅動器,街道和隧道照明以及辦公室和住宅區照明.本文介紹了ILD6150主要特性,框圖,應用電路,以及ILD6150 60V/1A演示板電路,電路圖,材料清單和PCB布局圖.
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. 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.
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.
ILD6150主要特性:
Wide input voltage range from 4.5 V to 60 V
Capable to provide up to 1.5 A output current
Up to 1 MHz switching frequency
Soft-start capability
Analog and PWM dimming possible
Integrated PWM generator for analog dimming input
Typical 3 % output current accuracy
Very low LED current drift over temperature
Undervoltage lockout
Over current protection
Thermally optimized package: PG-DSO-8-27
Adjustable over temperature protection, reducing thermal load by decreasing the current
ILD6150應用:
LED driver for general lighting
Retail, office and residential downlights
Street and tunnel lighting
LED ballasts
圖1. ILD6150框圖
圖2. ILD6150應用電路圖
ILD6150 60V/1A演示板
The demo board is configured to have an output current of 1 A. The operating voltage range for the demo board can be from 4.5 V up to 60 V.
圖3. ILD6150 60V/1A演示板外形圖
圖4. ILD6150 60V/1A演示板電路圖
圖5. ILD6150 60V/1A演示板PCB布局圖
ILD6150 60V/1A演示板材料清單:
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