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6 4 L E D D R I V E R S : ICsL6902D—Step-Down Regulator with AdjustableCurrent LimitThe L6902D is a complete and simple step-down switching regulator with adjustable current and voltagefeedback. Thanks to its current control loop with external sense resistor it is able to work in constantcurrentmode, providing up to 1.5A output with an accuracy of 5 percent. The outer voltage control loopis limiting the output voltage in case of load disconnection. Among other benefits, the L6902D features ageneral purpose 3.3V precise (2 percent) reference voltage or 2.5A (typical value) internal-current limit forshort-circuit protection.FeaturesBenefitsApplicationsL6902D evaluation board• Adjustable current limit• Precision 3.3V (±2%) reference• Few external components• Thermal shutdown• Protection againstfeedback disconnection• Constant voltage andconstant current• Adjustable current limit• Simple to implement• Over-voltage protection• High efficiency• General lighting• Dimmable lighting• Automotive interior lightingProduct SpecificationsPart NumberTypeDimmingTypeNumberof LEDs/StringNumber ofStringsConfigurationInputVoltage(VDC)OutputVoltage(VDC)OutputCurrent(mA)PeakEfficiency(%)DiagnosticCapabilities*InterfaceL6902D Buck PWM-analog 8 Single Series 8-36 36 1,500 max. 97 TSD PWM/analogMARKETS LEGEND COMMERCIAL LIGHTING FLASHLIGHTS TRANSPORTATION BACKLIGHTING SIGNAGE*Diagnostic capabilities: TSD: Thermal shutdownMarketsST LED Evaluation BoardsST Board Order CodeLED Board DescriptionSTEVAL-ILL001V1Dimmable driver for HB power LEDs with Viper22A (DALI connector)STEVAL-ILL002V3High-brightness LED with diagnostic (40 LED) based on STP08DP05STEVAL-ILL002V4High-brightness LED with diagnostic (40 LED) based on STP08DP05STEVAL-ILL003V2High-brightness LED without diagnostic (32 LED) based on STP16CP596STEVAL-ILL009V1RGB color control board based on STP04CM05STEVAL-ILL010V1High-intensity LED dimming driver based on L6902STEVAL-CBP003V1Front-panel evaluation board based on STLED316SSTEVAL-ILL007V1High-intensity LED driver for MR-16 format based on L5973DSTEVAL-ILL008V1LED flashlight demoArrow Electronics Lighting Group1.888.9LIGHT1http://lighting.arrow.com
L E D D R I V E R S : ICs 6 5STCS2—2A Maximum Constant-Current LED DriverThe STCS2 is a BiCMOS constant-current source designed to provide a precise constant currentstarting from a varying input voltage source. The main target is to replace the discrete componentssolution for driving LEDs in low-voltage applications such as 5V, 12V, or 24V giving benefits in termsof precision, integration, and reliability. The device is available in PowerSO-10 that has excellentthermal performance, high-power capability, and high-power density.Features• Up to 40V input voltage• Less than 0.5V voltage overhead• Up to 2A output current• PWM dimming pin• Shutdown pin• LED disconnection diagnosticBenefits• Ease of implementation• Minimum number of externalcomponents• Integrated protection features• Keeps solution footprint tiny• Pb-free packaging availableApplications• LED constant-current supplyfor varying input voltages• General LED lighting• Small appliances LED lighting• Car LED lights• Industrial lightingSTCS2 demoboardProduct SpecificationsPart NumberTypeDimmingTypeNumberof LEDs/StringNumber ofStringsConfigurationInputVoltage(VDC)OutputVoltage(VDC)OutputCurrent(mA)PeakEfficiency(%)DiagnosticCapabilities*STCS2 Linear PWM 10 white LEDs 1 Series 4.5-40 Adaptive to 40V 2A NA LOD NAMARKETS LEGEND COMMERCIAL LIGHTING FLASHLIGHTS TRANSPORTATION BACKLIGHTING SIGNAGE*Diagnostic capabilities: LOD: LED open detectionInterfaceMarketsTypical application diagram for 2.0A LED currentArrow Electronics Lighting Group1.888.9LIGHT1http://lighting.arrow.com
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