Single - multichannel LED driver - strips, signage

Overview

Achieve top scalability, flexibility and cost efficiency

Both LED strips and multichannel LED applications require a constant voltage input, usually up to 60V. Commonly used in accent lighting, each LED string or channel needs an LED driver IC, usually, a linear LED driver IC for up to 250 mA LED current. Applications using linear LED driver ICs need a low voltage overhead of the IC so as many LEDs as possible can be stacked in series. This increases efficiency and reduces thermal overload on the LED board – two features the market demands.

Multichannel LEDs are the ideal choice when you require high light output combined with low output voltage, say below 60V. For such high current applications with switch-mode LED drivers, the key challenges are current accuracy, PWM and analog dimmability, and thermal protection. Turn to Infineon for the know-how and components you need to do so.

Products

System overview for LED strips and multichannel LED applications

Infineon’s products for LED strips and multichannel LED

To design the best possible LED strip, look no further than our portfolio of high-quality, cost-efficient components. For LED driver ICs, at Infineon, we offer two main product families: BCR and ILD. The BCR series contain the smallest and most affordable products for linear LED driver ICs. The ILD series features DC-DC LED driver ICs that provide high efficiency as well as other interesting features, such as thermal protection. Both families come with a line-up of regulators with an integrated power stage and a line-up of controllers that allow the utmost scalability via flexible dimensioning of the output stage.

Explore our products for more details on how you can maximize LED strips and multichannel LED designs with Infineon.

Linear LED driver ICs

The BCR linear LED drivers are perfectly suited for driving LED currents from 10 mA to 250 mA, making them the ideal choice for low- to mid-power LEDs in general lighting applications.
This represents the lowest-cost solution that requires an ultra-low external part count and PCB space. The light out- put can be adjusted via an external resistor. PWM dimming is supported either by a microcontroller interface or by means of an external digital transistor.
Thanks to its negative thermal coefficient, the LED load will be protected from overheating.
The new-generation BCR430U and BCR431U drivers feature an extra-low voltage drop and a smart temperature con-trolling circuit.

Low-power LED driver ICs (5–65 mA)


Product type	Group	Topology	V_S (min) [V]	V_S (max) [V]	I_out (typ) [mA]	I_out (max) [mA]	Dimming	Package	P_tot (max) [mW]
BCR401U	LED drivers for low-power LEDs	Linear	1.4 + _VfLED	40	10	65	Digital	SC74	750
BCR401W	LED drivers for low-power LEDs	Linear	1.2 + _VfLED	18	10	60	Digital	SOT343	500
BCR402U	LED drivers for low-power LEDs	Linear	1.4 + _VfLED	40	20	65	Digital	SC74	750
BCR402W	LED drivers for low-power LEDs	Linear	1.4 + _VfLED	18	20	60	Digital	SOT343	500
BCR405U	LED drivers for low-power LEDs	Linear	1.4 + _VfLED	40	50	65	Digital	SC74	750
BCR431U	LED drivers for low-power LEDs	Linear	6	42	15	42	Digital	SOT23-6	600

Medium- & high-power LED driver ICs (65–500 mA)

Product type	Group	Topology	V_S (min) [V]	V_S (max) [V]	I_out (typ) [mA]	I_out (max) [mA]	Dimming	Package	P_tot (max) [mW]
BCR430U	LED drivers for mid-power LEDs	Linear	6	42	50	100	Digital	SOT23-6	600
BCR320U	LED drivers for mid-power LEDs	Linear	1.4 + _VfLED	24 + _VfLED	250	300	No	SC74	1
BCR321U	LED drivers for mid-power LEDs	Linear	1.4 + _VfLED	24 + _VfLED	250	300	Digital	SC74	1
BCR420U	LED drivers for mid-power LEDs	Linear	1.4 + _VfLED	40 + _VfLED	150	200	No	SC74	1
BCR421U	LED drivers for mid-power LEDs	Linear	1.4 + _VfLED	40 + _VfLED	150	200	Digital	SC74	1
BCR450	LED controllers	Linear	3	27	70	ext. switch	Digital	SC74	500
TLE4309G	LED drivers for linear high-power LEDs	Linear	4.5	24	500	500	Digital	TO263	–

Very low-cost LED driver ICs

BCR401W/BCR402W

Features	Benefits
Up to 500 mW power dissipation in a small SOT343 package Negative thermal coefficient reduces output current at higher temperatures Automotive qualified according to AEC-Q101 Suitable for a wide variety of applications and power ranges Output current adjustable by resistor up to 60 mA High-side current control PWM dimmable by external transistor	Driving current always under control for homogeneous light output Longer lifetime of the LEDs due to reduced output current at higher temperatures (negative thermal coefficient) Easy paralleling of drivers to increase current Stacking of LEDs in front of driver to increase input voltage Contributes to longevity and reliability of LED system

Low-voltage-drop LED driver ICs

BCR430U/BCR431U

Features	Benefits
Max. 200 mV voltage drop at driver stage Supply voltage from 6 to 42 V Controls up to 100 mA LED current (BCR430U) Controls up to 42 mA LED current (BCR431U) Smart overtemperature protection	Very low voltage drop allows use of more LEDs or longer strips overall, which means fewer feeding points. Flexible current setting via resistor Homogeneous light output OTP: protecting not only the lifetime of the IC but also can be used to protect the reliability of the LED strip

Robust LED driver ICs

BCR320U/BCR420U

Features	Benefits
Homogeneous light output in different LED strings regardless of V_f and supply voltage Easy to implement with a low component count Flexibility to adjust the current via an external resistor from 10 mA up to 250 mA Automotive qualified according to AEC-Q101	Direct microcontroller interface for PWM dimming for BCR421U and BCR321U or dimming via PWM power Negative thermal coefficient to protect the lifetime of LEDs High power dissipation capability

Infineon component list

Product type	Description
BCR320U/BCR321U/BCR420U/BCR421U	Medium-power LED driver
BAS3007A-RPP	Schottky bridge for reverse polarity protection (RPP)

BCR401U/BCR402U/BCR405U

Features	Benefits
LED drive current preset to 10/20/50 mA Output current adjustable by resistor up to 65 mA Supply voltage up to 40 V High-side current control Up to 750 mW power dissipation in a small SC74 package Negative thermal coefficient reduces output current at higher temperatures Automotive qualified according to AEC-Q101	Driving current always under control for homogeneous light output Longer lifetime of the LEDs due to reduced output current at higher temperatures (negative thermal coefficient) Easy paralleling of drivers to increase current Contributes to longevity and reliability of LED system High power dissipation capability

LED driver ICs for 48 V supply

BCR602 60 V linear LED controller IC for flexible dimming

Features	Benefits
Pure analog dimming down to 3%, PWM dimming down to 1% V_S from 8 V to 60 V Current precision ±3% Overtemperature protection	Flicker-free deep dimming performance Operating in SELV area, flexible designs with BJT or N-channel MOSFET Current always under control for high light quality Protection of LEDs and system

Boards

Tools & Software

Solution Finder – your guide to a successful design

Use our Solution Finder to quickly and easily find, compare and purchase the right semiconductors for your project. Simply select your application and the online tool visualizes suitable components in useful system diagrams, which you can customize to your needs.

You can already access 400 solutions for motor control and drive applications in our tool. Coming soon: solutions for lighting, power supplies and other applications.

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Highlights

LED lighting portfolio overview 2021

Here at Infineon Technologies, we are passionate about developing these exciting solutions for LED lighting design challenges.

This brochure covers our latest recommended products and schematics for LED drivers, LED strips and signage, and radar sensors for smart lighting.

Download now our Infineon LED lighting brochure

The LED strip length calculation tool can make calculating the maximum number of segments and maximal length very easy.

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Long term reliability and longevity of LEDs are key. BCR430U is the best choice when you need to drive low-power LED strings and strips supplied by a DC voltage source and at the same time requesting more flexibility in voltage headroom.

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Novelic

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NOVELIC is a high-tech B2B engineering, design services, and solutions company, providing development of IC (Analog, AMS, RF), antennas, ASIC & FPGA, embedded systems, sensor fusion, DSP, mechanical system, sensors & multimedia signal processing, 802.11 communications, and mm-wave radar sensor modules.

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Radar sensors are extremely versatile in their application. Our Radar IoT devices bring powerful features to the smart devices of the future. Whenever reliable and robust motion sensing in a small, easy to integrate, and cost-effective package is needed, Novelic’s mm-wave radar IoT sensors are the perfect fit.

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RF Beam Microwave

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RFbeam is a leading supplier of planar Radar sensors, k-band measuring equipment, and engineering. Its product range covers simple low-cost doppler devices as well as state-of-the-art digital and superhet transceivers and systems. Typical applications are movement and industrial sensors, traffic supervision and analyzer systems, sports measurement equipment, and many other uses.

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The K-LD2 is a fully digital and low-cost radar movement detector. The digital structure. Learn more

K-LD7 is a fully digital low-cost Doppler radar that can measure speed, direction, distance and angle of moving objects in front of the sensor. Learn more

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