Golden Disk | Brick Hard Drive | Hard Drive Lacie power supply info and reviews for Golden Disk | Brick Hard Drive | Hard Drive. Lacie is well known for their External hard drives, external, raid and network hard drive and therefore sometimes we need to buy a power supply.

The LM2678 series of regulators are monolithic integrated circuits for a step-down switching voltage regulator capable of driving up to 5A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3V, 5V and 12V and an adjustable output version.

Modulated power supply is necessary for final stages of AM transmitters, transmitters with Gunn diodes in GHz frequencies. This amplitude modulating supply provides (in idle mode) an output voltage which can be adjusted with P1 between 6 and 8V; and when is modulated the output voltage is between 3 and 10V. Frequency domain is from 200Hz to 30kHz.
Without external load, the current consumption is 5mA. If T2 is cooled enough the modulation power supply cand deliver up to 800mA at 6V.

This DC power supply controller is controlled by pulse width modulation PWM, generated by the circuit around timer IC2 7555 according to the formula:
Duty cycle = ((R1 + (VR1/2)/(R1+R2+VR1)) x 100%
Diode D1 is used to bypass resistor R2 and half the effective resistance of the “lower” section of VR1, allowing the duty cycle to be varied from 0.01% to 99.9%.

ST1200 power supply is an excellent power supply which can reach 1200 Watt output with efficiency greater than 80% and with 100% modular cable system. Its full array of amenities such as dual PCI-E 8pin, six PCI-E 6pin, and six SATA connectors can support various power usage and up to three high-end graphic cards easily. Cooled by a quiet 135mm fan, the ST1200 is an awe-inspiring power supply with exceptional stability and optimal efficiency.