Following Simple PWM White LED Driver circuit designed by using IC LT3491 and IC LTC6992 from Analog devices. Here LT3491 is fixed frequency Step up DC-DC Converter specifically designed to drive up to six white LEDs in series from a Li-Ion battery. LTC 6992 is a silicon Oscillator with an easy to use analog voltage controlled pulse width modulation (PWM) Capability.
The AON6426 combines advanced trench MOSFET technology with a low resistance package to provide extremely low R DS(ON). Uninstall adobe reader xi mac. This device is ideal for load switch and battery protection applications. V Gate-Source Voltage ±20 V Drain-Source Voltage 30 Units Maximum Junction-to-Ambient A t. Requires Quote Available 30V Single N-Channel HEXFET Power MOSFET in a I-Pak package. International Rectifier. The MOSFET is the most widely used type of transistor and the most critical device component in integrated circuit (IC) chips. The monolithic integrated circuit chip was enabled by the surface passivation process, which electrically stabilized silicon surfaces via thermal oxidation, making it possible to fabricate monolithic integrated circuit chips using silicon.
LT3491 can drive white LEDs from 3 Volt supply an it has internal Schottky diode and also has one pin dimming and shutdown feature. Internal Switching frequency of this IC is 2.3MHz. It can operate with side range of Input supply from 2.5V to 12V. It Requires 1 µF Output Capacitor only. This IC comes in 6-lead DFN package and 8 lead plastic SC70 package.
Mosfet 6992 Datasheet
Circuit Diagram
Components Required (BOM)
Construction & Working
Tally erp 9 5.0 crack. This Circuit Constructed to drive four small white LEDs from Li-Ion battery power supply, we can dimming the LED Brightness by varying the PWM from IC LTC6992 or by changing the value of R3 Resistor. Four white LEDs are connected with the LED pin5 and to the Q1 MOSFET drain pin, Gate terminal of Si2302 is connected with CTRL Pin of LT3491 and PWM out Pin of LTC6992. Me3 save editor.
IC LTC6992 Oscillates the PWM from Simple 0V to 1V Analog input, Here the MOD pin is connected to the power supply through R1 and RV1 Resistors in order to change the analog voltage input at MOD pin. This IC can oscillate from 3.81Hz to 1MHz Output frequency. This IC Comes in DFN and SOT packages Refer datasheet for more information.
Printed Circuit Board
Interactive Board Viewer
6992 Mosfet Circuit
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