Showing posts with label LED-Lighting-IC. Show all posts
Showing posts with label LED-Lighting-IC. Show all posts

Saturday, March 19, 2016

5 Watt LED driver with Zetex - Diodes

LED Drive Solutions and Power Supply Design ideas. Robust and efficient high-brightness LED drivers. Zetex have LED drivers for boost/buck they are cost effective too,

Zetex range of LED drivers - Diodes Incorporated

Shown below is a design from an Application Note of Zetex. Here ZXSC400 drives a Luxeon V Star LED. The input voltage ranges from 4.2V to 5.4 V with a maximum output current of 700mA at 5V input.

5 Watt LED driver with Zetex - Diodes

ZXSC400 - LED driver boost converter

Voltage mode boost converter in the SOT23-6 package. Its low feedback voltage allows the current in a chain of LEDs to be set and accurately monitored with a single resistor giving minimal losses. Excellent load and line regulation. 1.8V to 8V supply range, regulation of ±1%, 80% efficiency, 4.5µA Quiescent drain.

Friday, September 25, 2015

MIP551 and MIP552 - Panasonic Semiconductors

MIP551 and MIP552 are good devices used in LED-lighting power control. Small size & high efficiency and most important worldwide input voltage (80 VAC to 280 VAC), and has dimmer control too.

ASSP for Power Supply - Intelligent Power Device

Typical LED peak current - MIP551 : 0.5 A and MIP552 : 1.0A; Over temperature protection for IPD (Auto-restart). Constant current control with simple LED drive circuit.

 IPD for LED-lighting MIP551 - EEM
IPD for LED-lighting MIP551/MIP552

MIP551/MIP552 - IPD (Intelligent Power Device) LED Lighting Driver 80 to 280 V - Output Freq is 44 kHz
  • MIP551 - 10 W Output Max
  • MIP552 - 30 W Output Max

Wednesday, September 9, 2015

Constant LED Brightness and LDS8711

The LDS8711 is a fixed frequency current mode boost converter with internal rectifier and cycle-by- cycle switch current limit specifically designed to drive a string of up to 10 White LEDs.

Constant LED Brightness and LDS8711

Aa Switching Converter Chip with hardly any external components driving a HB LED chain. HB - High Brightness LED. This IC is from IXYS Power Devices.

High efficiency boost converter with the input voltage range from 2.7 to 5.5 V . Drives one LED string with 10 LEDs in series up to 32 mA.
  • 250 mV current sense voltage
  • No external Schottky Required
  • 0.7 MHz Switching Frequency
  • Efficiency greater than 83%
  • PWM LED Brightness Control
  • Low Shutdown Current (<1µA)
LED Current Setting - The maximum current value in the LED string may be factory preset in the range from 10 to 30mAin 0.125mA steps, or set by Smart OneWire interface in the range from 0.125to 32 mA.The average LED string current that determines LED brightness may be controlled applying PWM signal to the EN/PWM pin.

Monday, December 23, 2013

SSL2101 SMPS Controller - NXP Semiconductors

The SSL2101 is a Switched Mode Power Supply (SMPS) controller IC that operates in combination with a phase cut dimmer directly from rectified mains. It is designed to drive LED devices..

SSL2101 SMPS Controller - NXP Semiconductors

SSL2101 SMPS Controller - NXP Semiconductors

SSL2101 12W-230V Triac dimmable fly-back demonstration board UM10341

The SSL2101 driver is a solution for a professional application with multiple high power  LEDs that require galvanic isolation and a safe output voltage. It is mains dimmable for  both forward phase (triac) dimmers, and reverse phase (transistor) dimmers.

Triac dimmable fly-back demonstration board UM10341

It can  generate up to 16 W output power, which is equal to a 100 W incandescent lamp (at  63 Lumen/W). Examples are shelf lighting, down lighting and LED lighting for bathrooms  etc. The design demonstrates how to produce a driver that is suitable for small form factor  applications such as retrofit lamps.

Saturday, November 30, 2013

IRS2980 - LED Driver Control IC - International Rectifier

A high-voltage buck regulator control IC for LED light bulb replacement, LED tube lighting and other non-isolated LED driver applications.First in a family of high-voltage LEDrivIR ICs, and utilizes hysteretic average current mode control for precise current regulation. 

IRS2980 - LED Driver Control IC - International Rectifier

IRS2980 - LED Driver Control IC - International Rectifier

Some of the Features - Dimming LED driver controller, Hysteretic Current Regulation, Closed-loop LED current dimming control, Analog/PWM Dimming Input, Internal High Voltage Regulator.

IRPLLED13 - 90-250VAC Offline LED Driver using LEDrivIR IRS2980

90-250VAC Offline LED Driver

Non-isolated constant current buck regulator,  90-250V AC input voltage, 0-50V DC output voltage, Nominal output current of 350mA.

A simple single st age power converter based around the IRS2980 LED driver IC provides a contro lled current output ov er a wide AC line or DC voltage input range.

The IRPLLED13 evaluation board is an off line non-isolated constant current Buck regulator LED driver designed to supply a nominal 350mA DC output current. The LED output voltage can be up to 90% of the input voltage, operating from an AC line input volt age between 90 and 250VAC 50/60Hz. The IRPLLED13 demo board is not de signed for use with dimmers.

Monday, March 12, 2012

Offline Isolated Flyback LED Controller - LT3799-1

This chip for LED driving has a power factor correction, the critical conduction mode keeps transformer small. A opto-coupler for feedback is avoided by an innovative primary shunt monitor.

Offline Isolated Flyback LED Controller - LT3799-1

Features

  • Offline 4W to 100W+ LED Applications
  • High DC VIN LED Applications
  • Gate driver to drive an external high voltage MOSFET.
  • Typical power factors of 0.97.

20 Watt LED Driver using LT799-1

20 Watt LED Driver using LT799-1

Monday, August 8, 2011

LED Drive using TPS61042

This Chip from TI is simple to integrate into your designs and this solution is good for production of lighting gadgets, here a consistent quality and predictable performance is easily obtained.
TPS61042 30-V, 500-mA Switch Boost Converter in QFN-8 for White LED Applications
LED-driver application that drives four LEDs with 20 mA of forward current and operates from an input voltage range of 1.8 to 6.0 V.
The entire circuit consists of the control IC, two small ceramic caps, an inductor, a diode, and a current sense resistor. The primary power-supply functions and the secondary features such as load disconnect, overvoltage protection, and PWM dimming have been implemented with a control IC and five small surface-mount passive components. Read more - LED Drive TPS61042 at eem
LED-driver considerations - By Michael Day

Saturday, June 18, 2011

MAX1910 White LED Charge Pumps - Maxim IC

Drives LEDs with a regulated output voltage or current (up to 120mA) from an unregulated input supply (2.7V to 5.3V). These are complete DC-DC converters requiring only four small ceramic capacitors and no inductors. 200mV Current-Sense Threshold Reduces Power Loss.

MAX1910 White LED Charge Pumps - Maxim IC


1.5x/2x High-Efficiency White LED Charge Pumps

Some Features
  • High-Efficiency 1.5x/2x Charge Pumps
  • Low Input Ripple with 750kHz Operation
  • Up to 120mA Output Current
  • 1µA Shutdown Current

Friday, June 17, 2011

MAX1561 - 26V Step-Up Converters - Maxim IC

The MAX1561 and MAX1599 include an internal, high-voltage, low-RDS(ON) N-channel MOSFET switch for high efficiency and maximum battery life. A single DualMode input provides a simple means of brightness adjustment and on/off control.

MAX1561 - 26V Step-Up Converters - Maxim IC

"High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs"

MAX1561 - 26V Step-Up Converters - Maxim IC

Fast 1MHz (500kHz for the MAX1599) current-mode, pulse-width modulated (PWM) operation allows for small input and output capacitors and a small inductor while minimizing ripple on the input supply/battery. Programmable soft-start eliminates inrush current during startup.

Some Features -
  • Accurate Current Regulation for Uniform Illumination
  • High Efficiency Up to 87%
  • 2.6V to 5.5V Input Range
  • 0.3µA Shutdown Current
  • 26V (max) Output with Overvoltage Protection
  • Up to 900mW Output Power with Internal 30V MOSFET Switch
Why Drive White LEDs with Constant Current? - Maxim

Here you can understand how to drive white LED' s for flashlight or Internal lamp. I have tried substituting for tubelights and bulbs. These LED's are amazing. The amount of light at even 100mW is phenomenal. The future is indeed LED Lights. But more Amber component is required in LED to give the warm feeling of an Edison Lamp.