July 24th, 2012
5. GND = Ground, internally connected to pin 1.
6. REF = Reference Input, connect to GND via an external resistor to
adjust the output current.
7. Q = Output.
8. I = Input, block to GND directly at the IC with a 100 nF ceramic
September 1st, 2010
The LM3909 features low cost, low voltage and low current drain, with a bright-high current LED pulse and wide temperature range. It can be applied on applications such as flashlight finder, siren for toy fire engine, sawtooth generators, emergency locators, warning indicators and etc. [...]
July 18th, 2012
According to the TLE4241GM datasheet, the IC may produce an adjustable output current through any other device such as SET, PWM, reference resistor in an independently from load and supply voltages. Its adjustable output current make this device can be applied in a broad range of LED applications. [...]
September 2nd, 2009
If you consider in designing a LED lamp driver using a low noise boost buck topology to control the application, you may use the HV9930 from Supertex. It can be applied to RGB backlight applications, battery powered LED lamps, and other low voltage AC/DC or DC/DC LED drivers. And below is the circuit diagram of Boost-Buck Converter using the HV9930. [...]
August 17th, 2012
Brushless DC Motor Circuit can be completed in TDA5140A Datasheet. [...]
August 15th, 2012
A: Apply momentary ground to reset hours to zero.
B: When using the MTH6 with inductive loads, we recommend installing a suppression diode across all coils.
C: Terminals 4 and 8 may be grounded on negative ground power supply.
D: Alternator must be equipped with a tach terminal (auxiliary AC terminal).
E: Connecting full battery potential to terminal 9 can cause damage
to the switchgage. Shutdown circuit is rated for 300 mA continuous. Circuit grounds out at set point. [...]
August 14th, 2012
Integrated laser drivers is recommended for fast switching, since signal changes will move faster because of reduced wiring line inductance and capacitance. The use of integrated laser driver circuit gives some benefit such as: output power stability improvement, board space reduction, error monitoring, better dynamic performance, and MTBF reliability improvement. [...]
August 10th, 2012
The phase shift oscillator works in such a way that if the amplitude of the inverting amplifier is not high enough the system will continually attenuate the signal until the amplitude is zero, it was therefore decided to change the amplification power of the inverting amplifier. [...]
August 8th, 2012
And here is the NCP1034 datasheet(source:onsemi.com). [...]