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led resistor calculations

Catalog Datasheet MFG & Type PDF Document Tags

R2d DIODE

Abstract: optocoupler MTBF expected to be higher than the calculated figures. LAMBDA KPS10Series MTBF CALCULATIONS KPS10 , Emitting Diode 9.2 Resistor film or glaze 9.2 9.8 9.9 10.11 10.14 10.14 10.14 10.14 10.14 11.1 11.1 16.1 22.1 17.1 17.1 Resistor film or glaze Resistor Thermistor Resistor Variable , D5 D11,D12 BR1 ZD1,ZD2,ZD3 IC3 Q1 IC2 LED R1,R5,R11,R12,R13,R14, 10 R15,R16A,R16B,R17 4 , Rate (FR)*10^6 Hours LAMBDA KPS10Series MTBF CALCULATIONS KPS10-5 CAT 6.1 6.1 6.1 6.1
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R2d DIODE optocoupler MTBF R2C Zener r2d transistor CAPACITOR mtbf diode r2c MILHDBK-217F KPS10S KPS10-3R3

R2d DIODE

Abstract: R2C Zener expected to be higher than the calculated figures. LAMBDA KPS15Series MTBF CALCULATIONS KPS15 , Emitting Diode 9.2 Resistor film or glaze 9.2 9.8 9.9 10.11 10.14 10.14 10.14 10.14 11.1 11.1 16.1 22.1 17.1 17.1 Resistor film or glaze Resistor Thermistor Resistor Variable , IC3 Q1 IC2 LED R1,R5,R11,R12,R13,R14 10 R,R15,R16A,R16B,R17 4 R2A,R2B,R2C,R2D 1 TH1 1 VR1 5 , CALCULATIONS KPS15-5 CAT 6.1 6.1 6.1 6.1 6.1 6.1 6.4 6.11 6.11 TYPE Diode, General Purpose
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transformer mtbf transistor t1A Zener Diode r2b TRANSISTOR mosfet transistor R2b r2c transistor KPS15S KPS15-3R3

5091-9704E

Abstract: 9704e limiting typically takes the form of a current limiter resistor, R, placed in series with the LED. The , . The example calculations in this application note use representative data typically contained in LED lamp data sheets. The purpose of the calculations is to ensure reliable operation of an LED lamp when operated at an elevated ambient temperature. For the example calculations, a sample T-1 3/4 LED lamp is , using Equation 2. Using the above sample LED lamp, the following example calculations determine the
Avago Technologies
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5091-9704E 9704e
Abstract: resistor Efficient and reliable operation of LED lighting is dependent on the right choice of , Efficient and reliable operation of LED lighting â'¦and the right current-limiting resistor Given these , R = ballast resistor It is possible to use a rectified and smoothed mains input to power the LED , ) across a single LED, meaning that considerable power would be wasted in the ballast resistor compared , be less that the voltage dropped across the resistor. Instead most LED lighting systems employ Riedon
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5091-9704E

Abstract: LED current Limiting Calculation RJ-A current limiter resistor, R, placed in series with the LED. The forward voltage , purpose of the calculations is to ensure reliable operation of an LED lamp when operated at an elevated ambient temperature. For the example calculations, a sample T-1 3/4 LED lamp is used, with 0.45 mm , hH Operational Considerations for LED Lamps and Display Devices Application Note 1005 In the design of a drive circuit for an LED lamp, an LED light bar, or an LED 7-segment display, the
Hewlett-Packard
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LED current Limiting Calculation

tpa fuses

Abstract: TP15900-4 installation-Connection directly to bus bar. · Eliminates external wiring per pole. · LED alarm signaling (LED current , circuitry. · Standard 0.25" QC terminal for alarm circuit connections. · Bi-polar LED provides capability , : mm Inches BIPOLAR LED ALARM CONTACT 22.35 0.880" LOAD CONTACT 121.41 4.780" 99.3 , /Protection System Proper sizing of the current limiting resistor, referred to as RALARM in the diagram below, is essential to prevent excessive current, which could cause damage to the LED in the
Cooper Bussmann
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TP15900-4 E56412 tpa fuses TPI5900-4 SB99155

5091-9704E

Abstract: 9704e representative data typically contained in LED lamp data sheets. The purpose of the calculations is to ensure , calculations, a sample T-1 3/4 LED lamp is used, with 0.45 mm (0.018 in.) square leads and the following , LED lamp, the following example calculations determine the thermal resistance requirements for , Operational Considerations for LED Lamps and Display Devices Application Note 1005 Introduction In the design of a drive circuit for an LED lamp, an LED light bar, or an LED 7-segment display
Agilent Technologies
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mtbf pump

Abstract: automatically when the input voltage decreased. Its internal 4 current sink regulators ensure both the LED current matching and the brightness uniformity. The LED current can be programmed by an external resistor, RSET connected between the RSET pin and ground. LED current of up to 30mA are supported by the , Information Reliability Test Summary Life Test Data FIT Data Calculations MTBF Data Calculations ESD , 4-channel charge pump white LED driver, capable of driving up to 4 LEDs connected in parallel. The
Exar
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mtbf pump SP6887ER4 SP76887ER4

fuse catalog 48V dc

Abstract: led resistor calculations through a single LED. This will insure that the 30 mA limitation is not exceeded. The calculations , THE AVAILABLE ALARM CIRCUIT CURRENT TO ² 30mA. THE MINIMUM RESISTOR WATTAGE CALCULATIONS IS ALSO , Eliminates external wiring - per pole · LED alarm signaling (LED current 10mA max.) · Blown fuse indication , Bi-polar LED provides capability for both -48V DC and +24V DC applications · Fuse presence indication · , Certified Class 1422-30, File 53787 TPA-B 20, 25 65V DC 20 kA BIPOLAR LED ALARM CONTACT LOAD
Cooper Bussmann
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SB98107 fuse catalog 48V dc led resistor calculations TP15914

coulomb counter

Abstract: LTC4150 measures battery depletion and charging by monitoring current through a sense resistor. It detects the , sets the DC756 to normal operation or a low-current shutdown mode. A bi-colored LED indicates the , Min./Max. Voltage range Min./Max. Voltage range Default Sense Resistor 0.01, 1/8 W Sense Resistor , is flowing out of the battery. On the DC756, POL is also used to drive the bi-colored LED and bit one of the shift register. The LED turns red to indicate the battery is discharging, while a green
Linear Technology
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LTC4150 coulomb counter DC590

zener diode 6w

Abstract: (internally connected to MOSFET source). Connect a resistor from ISNS to GND to set the maximum LED current , bulb and therefore behave as an emulated resistor. The resistor value is determined based on the LED , Isolated Flyback LED Driver . ABSTRACT This application note describes the performance of a LM3448 based Flyback LED driver solution that can be used to power a single LED string consisting of seven to eleven series connected LEDs
Texas Instruments
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zener diode 6w SNOA554C AN-2090 ISO/TS16949

led flashlight

Abstract: TPS61xxx resistor. General information regarding white LED drivers is provided in the TPS61040EVM-002 User's Guide , sense resistor at full LED current, Vref = feedback voltage of the TPS61090 For this design, R6 was , desired voltage across the current sense resistor at full LED current, Iout = full LED current, Rdson = , resistor at full LED current, Vf = forward voltage across LED, Iout = full LED current, Eff = target power , Application Report SLVA211 ­ June 2005 Powering a White LED Flashlight With the TPS61090
Texas Instruments
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led flashlight TPS61xxx TPS61040 SLVS484 TPS61091 TPS61092 TPS61 SLVU068
Abstract: (internally connected to MOSFET source). Connect a resistor from ISNS to GND to set the maximum LED current , non-isolated LED driver solution that can be used to power a single LED string consisting of eight to twelve , adjust the LED forward current, the number of series connected LEDs that are driven and the switching , most standard TRIAC dimmers. Refer to the LM3448 Phase Dimmable Offline LED Driver with Integrated FET , injection circuitry enables PFC values greater than 0.85 Adjustable LED current and switching frequency Texas Instruments
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SNOA559B AN-2127 SNOSB51

3478FE-1

Abstract: NCP15XW223J0SRC calculations to derive the resistor values required for CTRL1 and CTRL2 pin voltages to achieve a given LED , integrating the LED current sense resistor. The LT3478 uses an external sense resistor to extend the maximum , internal (LT3478-1)/external (LT3478) resistor between the VOUT and LED pins senses LED current for , can be set by a resistor divider from VREF or an external voltage source. Maximum LED current is , current. A sense resistor connected in series with the LED(s) provides feedback of LED current to the
Linear Technology
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3478FE-1 NCP15XW223J0SRC UP4B-220 luxeon catalog CDRH103RNP-4R7NC-B LT3478/LT3478-1 3478/LT3478-1 MSOP10 LT3474 TSSOP16E LT3475

230V ac to 9V dc converter circuit

Abstract: 230V AC to 9v DC Converter without using transformer designed to provide an AC to LED solution for a 30W LED load. Specifically, it takes an AC mains input , LED stack voltage of 45V). There are two assembly versions designed to operate from two different , input and provides a constant current of 700mA to the LED load. This two stage design provides , single stage design including: · No 120Hz LED current ripple. · Better dimming performance at low dimming levels. · Better line disturbance rejection. · Better efficiency using small LED stack voltages
National Semiconductor
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230V ac to 9V dc converter circuit 230V AC to 9v DC Converter without using transformer power supply driver led 30w schematic d20 diode dimmer 10 amp 220v transformer from 230V AC to 9V ac 500ma LM3450A 120VAC 230VAC LM3409HV 90VAC 135VAC

SP6699

Abstract: SP-6699 resistor is needed to control the LED current and obtain satisfied brightness. A constant frequency 1.0MHz , Reliability Test Summary Life Test Data FIT Data Calculations MTBF Data Calculations ESD Testing Latch-up , . When any LED is broken or in other abnormal conditions, the output voltage will be clamped to 27V. The , Manufacturing Information: Product: SP6699 Description: White LED Step-Up Converter Package Information , Rate Calculations FIT rate (failures in time) is the predicted number of failures per billion device
Exar
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SP-6699 inductor mtbf

PS401 Smart Battery IC Users Guide

Abstract: DS40239A . 17 5.3 Capacity Calculations , 6.4 LED Control , Calculations . 43 8.5 EOD and FCC , and capacity calculations and eliminates the need for an external crystal. 1.8 TEMPERATURE , Eight programmable digital input/output pins are provided by the PS401. These pins can be used as LED
Microchip Technology
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DS40239A DK-2750 PS401 Smart Battery IC Users Guide li-ion 11.1v 2900 mAh nimh charger smart ups 750 circuit lead acid battery SoC measurement circuitry 11F-3 D-85737 DS40239A-

220V 350mA LED driver

Abstract: Ac 230v to Dc 12v led driver with pwm dimming designed to provide an AC to LED solution for a 15W LED load. Specifically, it takes an AC mains input , LED stack voltage of 45V). There are two assembly versions designed to operate from two different , provides a constant current of 350mA to the LED load. This two stage design provides excellent line and , design including: · No 120Hz LED current ripple. · Better dimming performance at low dimming levels. · Better line disturbance rejection. · Better efficiency using small LED stack voltages. 120VAC 15W
National Semiconductor
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LM3409 220V 350mA LED driver Ac 230v to Dc 12v led driver with pwm dimming 220v 350ma led circuit transformer 230V 16V 350mA Simple Circuit Diagram of 230V to 3V Voltage Converter 2 PHASE 220V AC to 120V DC regulated switching LM3450 AN-2098

25AA040

Abstract: 25LC040 active but resting · Provides 4-LED display of Relative or Absolute State-of-Charge indication , Introduction. 2 Capacity Calculations , Interface. 22 LED and SAFEOUT Ports. 25 Voltage Regulator & , wide operating range. Typical resolution using a 25 milli-ohm current sense resistor is better than , the external EEPROM for use in capacity calculations and predictions. Values such as
PowerSmart
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25AA040 25LC040 2N7002 NM25C040 PS330 resistor 330 Ohm DATA SHEET PS330S PS330X PS330R

li-ion 11.1v

Abstract: rshn sigma-delta A/D converter accurately measures: - Current through sense resistor (15-bits) - High voltage , Safety function I/O - SOC LED output drive pins - General purpose I/O · Full SMBus v1.1 2-wire host , analog supply input); ground RSHP, RSHN Current sense resistor input I External thermistor input VREFT O Thermistor reference voltage ROSC I Internal oscillator bias resistor , support charge or safety control, SOC LED display or user-programmable digital I/O. Microchip's PS402
Microchip Technology
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PS402-01XX rshn TDA 3780 103ETB Fuel-Gauge IC with LED Display DS21766A-
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