Author Archive
Driving 10 Series LEDs with TPS61160/1
By Rust at 10 March, 2010, 5:18 am
TPS61160/1 with 40-V rated integrated switch FET is a boost converter that drives up to 10 LEDs in series. The boost converter is used to reduce output ripple, improve conversion efficiency, and allows for the use of small external components. The default white LED current is set with the external sensor resistor Rset, and the [...]
Read More >>High Toggle Rate High Frequency Analog Switch
By Rust at 3 March, 2010, 9:17 pm
Low impedance gate drive to the 2N3970 analog switch for both on and off drive conditions is provided by this commutator. By producing a low ac impedance for off drive and high ac impedance for on drive to the 2N3970, this commutator circuit can close enough to the ideal gate drive conditions for high frequency [...]
Read More >>Low Cost 4-20mA Current Loop Signal Conditioning Circuit MAX1452
By Rust at 21 February, 2010, 5:17 am
The benefits of 4-20mA current loop format in process control systems are 2-wire sensor operation, long cable runs, and noise immunity. The voltages for the loop can be ranging from 12VDC to 40VDC and are inherently nonratiometric to the output signal. The MAX1452 low current consumption allows the system to operate from loop power with [...]
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