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Home Semiconductor News

Highly efficient NFC programming method for LED drivers

Semiconductor For You by Semiconductor For You
May 27, 2021
in Semiconductor News
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NFC-PWM-series-NLM0011-and-NLM0010Munich, Germany – 2 October 2019 – For fast and cost-effective implementation of NFC programming for LED drivers, Infineon Technologies AG (FSE: IFX / OTCQX: IFNNY) developed the NFC-PWM series NLM0011 and NLM0010. NFC programming is an emerging technology designed to replace the labor-intensive “plug-in resistor” current setting method via contactless NFC interface. Besides improving the operational efficiency by enabling automatic programming in the manufacturing line, it creates significant flexibility in the value chain. With this it reduces the LED driver variants, simplifies the selection of LED modules, and allows end-of-line configuration.

The devices are NFC wireless-configuration ICs with configurable PWM output, primarily designed for LED applications. They enable cost-effective NFC programming implementation by using a PWM signal directly to control the analog driver IC. Comparing to the microcontroller based solution the system BOM cost is reduced.

Both devices have two operation modes, passive and active mode. In the passive mode, the LED driver module is not powered, and the PWM-related parameters can be configured wirelessly via the NFC interface. In the active mode, as soon as the V CC voltage supply is powered, a PWM output is generated according to the stored parameters. With an external R/C filter, the PWM signal is converted to the desired DC voltage to control the current output of an LED driver.

Another highlight feature of NLM0011 is the integrated constant lumen output (CLO) function. This function compensates the luminous flux drop (aging effect) of the LED module by automatically adjusting the LED current to the aging characteristics of the LEDs. With an integrated operation-time counter (OTC) and stored LED degradation curve in the CLO table, NLM0011 automatically adjusts the PWM duty cycle to compensate for the LED degradation.

Perfectly fitting to the mainstream analog driver ICs, there is no need for firmware development efforts, and it can be easily adopted into existing designs to replace the “plug-in resistor” current configuration concept. Non-volatile memory (NVM) including UID (Unique Identification Data) and 20 bytes free memory for user data is also featured in the devices.

The solution is compatible with existing analog LED-driver designs and the NFC programming specification from the Module-Driver Interface Special Interest Group (MD-SIG). Besides LED power supply applications, the NFC-PWM series can also be used in applications like motor control and SMPS.

Availability

The NLM0011 and NLM0010 can be ordered now in a SOT23-5 package. More information is available at www.infineon.com/nfc-pwm.

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Tags: InfineonLEDLED DriversNFCSemiconductors
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