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2500W Phase Control

2015-03-01 01:39  
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This circuit controls resistive and inductive loads up to 2,500W. Its main functional device is an integrated phase control circuit - Siemens TLE3103. It contains its own power supply, a zero voltage crossing detector circuit and a logic driver. An additional feature is the low voltage input to enable/disable triac firing enabling/disabling the logic driver. The function is as follows: pin13 TLE3103 open (floating), trigger output active, tied to ground trigger output disabled. BTA41 Description An UP and a DOWN pushbutton control a 32-step digital potentiometer (IC2, AD5228) via the debouncer IC1 (MAX6817). The digital potentiometer has a power on reset pin which might be tied to ground causing the potentiometer to start at midscale, or to VCC causing it to start at zero scale. The desired function is selectable using jumper JP1. The triac (capable of driving 40A loads) is a bit overkill for the desired power but the BTA41 has an isolated body and therefore handling of the board under voltage is less dangerous as it is with phase on the package. The snubber circuit uses a 68μH inductance but this might be replaced with a 100 resistor. When replacing the inductance C5 should have a value of 47nF.Board: Purely single sided, measurements: 3.54X2.15 inches (87.63X54.61mm)Remark: The debouncer circuit is manufactured with a SOT23-6 package. It might be soldered directly onto the board (DIP-6 package) using thin wires or an adapter board. BTA41 Parts List Part Value PackageC1 100n C-5C2 100n C-5C3 100/16 ELC3,81C4 22n C-5C5 10n/250VAC C-15D1 1N4005 DO41-10IC1 MAX6817 AD-SOT23IC2 AD5228 DIL08IC3 TLE3103 DIL-14J1 TE-03 TERMINAL 5.08J2 TE-03 TERMINAL 5.08J3 TE-03 TERMINAL 5.08L1 68H/3A DS30AQ1 BTA41-600 TOP3R1 120R R-10R2 18K/2W R-18R3 820K R-10R4 180K R-10R5 56K R-10S1 UP BUTTON-02S2 DOWN BUTTON-02 PCB 1BTA41PCB 2BTA41PCB 3BTA41PCB 4 BTA41