LED strips and signage - Infineon Technologies

Overview

Achieve top scalability, flexibility and cost efficiency

LED strips require a constant voltage input. Commonly used in for channel letters or accent lighting, each LED string or channel needs a linear LED driver IC for up to 250 mA LED current whereas for most applications the current level is below 60 mA. 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 –features the market demands.

Products

System overview for LED strips and multichannel LED applications

Infineon’s products for LED strips and signage

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 the linear regulator family BCR. The BCR series contain the smallest and most affordable products for linear LED driver ICs.

Explore our products for more details on how you can maximize LED strips and Signage 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

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Highlights

LED lighting portfolio overview

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.

Download now

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.