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Wednesday, November 19, 2014

45 W Stereo Tube Amplifier

Stereo Amplifier with Tube

Stereo amplifier is very simple, consisting of 5 active components including the power supply it. Series Stereo Amplifier With Tube was prepared with 5 units trioda tube consisting of 1 unit tubes 5Y3 GT vacuum rectifier, 2 tube tube trioda 6SF5 GT high-mu tube 6k6 and 2 units which form the power beam amplifiers.

Power consumption for the circuit with a tube stereo amplifier is not more than 45 Watt. Current consumption for the circuit with a tube stereo amplifier is around 3A. A complete range of stereo amplifiers with this tube can be seen from the following series of images.

Stereo Amplifier With Tube

Sign Component Stereo Amplifier With Tube

R1, R10, R13 2.2M
R2 470K 1/2W
1 Meg 1/2W R3
R4 220K 1/2W
R5 330 Ohm 2W
R6 220K 1/2W
R7 2.2Meg 1/2W
R8 1Meg 1/2W
R9 720 Ohm 20W
R11 33K 1/2W
R12 22K 1/2W
C1, C9 400V 0.005uF
C2 0.05uF 600V
C3 20uF 25V
C4 0.01uF 400V
C5 200uuF 400V
C6, C7 15uF 450V
C8 15uF 400V
T1 117V Primary, Secondary 350VCT, 2 × 6.3V
T2 7600 Ohm Primary, Secondary 4 or 8 Ohm
SW1 SPST Switch
SP1, SP2 12 "4 / 8 ohm
C8 in the series stereo tube amplifier with the above serves to reduce radio frequency interference and to optimize the work of a wild series of ampifier stereo with these tubes.

Saturday, October 18, 2014

Circuit Diagram for 250 W HID Metal Halide Electronic Ballast

The following file is an application note from st.com describing the two stages of electronic ballast for a 250 W HID (high-intensity discharge) metal halide lamp. The ballast is composed of a boost converter (power factor controller PFC) working in fixed OFF time and an inverter composed of a full bridge that drives the lamp at low frequency square wave. The components include a PFC driver, half-bridge drivers, a microcontroller, an auxiliary power supply, a voltage reference, logic parts, an amplifier, comparators, power devices as Power MOSFETs, IGBTs, and fast diodes.

Herein this file you will find detail information regarding 250 W HID lamp description, general circuit description, board description, L6385 high-voltage high and low side driver, ST7LITE39 microcontroller (application pin), auxiliary power supply, TS272 high-performance CMOS dual operational amplifiers, LM119 high-speed dual comparators, 74AC00 QUAD2-input NAND gates, lamp data, PFC section design criteria, full bridge design criteria, experimental results, firmware flowchart, references, and revision history.

Thursday, August 28, 2014

Power Amplifier 2 x 12 W by TDA2007

TDA2007 Amplifier Circuit , this is stereo power amplifier with power output 2 x 12Watts . Minimum voltage require 8 volts and maximum voltage require 26 volts , with DC supply voltage. Impedance output is 8 ohms. See schematic diagram below :

Monday, August 18, 2014

1 W BTL mono audio amplifier

GENERAL DESCRIPTION

The TDA7052 is a mono output amplifier in a 8-lead dual-in-line (DIL) plastic package. The device is designed for battery-fed portable audio applications.

Features:

No external components
No switch-on or switch-off clicks
Good overall stability
Low power consumption
No external heatsink required
Short-circuit proof

Circuit Diagram

1 W BTL mono audio amplifier

Friday, August 15, 2014

15 W MONO CLASS D AUDIO POWER AMPLIFIER

General Description

The TMPA401DM is a bridged-tied (BTL) Class-D audio amplifier for driving speakers with high power efficiency. It can drive 4Ω, 6Ω, 8Ω or 16Ω speakers. The output power can be up to 15W. No external heat-sink is necessary. The gain of the amplifier is defined by input resistance. The internally fully differential input structure provides good common mode rejection and power supply rejection. Thermal protection and short-circuit protection are integrated for safety purpose. The internal de-pop circuitry eliminates pop noise at power-up & shutdown operations.

Circuit diagram

15-W MONO CLASS-D AUDIO POWER AMPLIFIER