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Subject: Layout , new designs, PID Controller for TEC, size is very compact, PCB size: 15mmx15mm
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Date: 08/23/02 at 11:57 AM
Posted by: Vladislav Dremakov
In Reply to: PCB Desing, Layout , Full Turn-Key AND PCB manufacturing posted by Mahesh Babaria on 08/22/02 at 7:16 PM:
Please let me introduce myself.
I am occupied with high density circuits and would like to offer my new designs in the sphere ThermoElectric Cooler (TEC) Controllers, DC heaters and Laser Diode Drivers, Green, Visible and Infrared beam modules.
I have designs of different laser diode drivers (APC and ACC circuits) for different laser diodes with currents:
Up to 0.5Amp;
Up to 1.0Amp;
Up to 1.5Amp;
Up to 2.5Amp;
Up to 5.0Amp;
Up to 10.0Amp.
For an example, I have design High Efficiency, Low Noise, High power density driver for laser diode, size is very compact, PCB: 12mmx12mm with current Up to 2.5Amp.
Also, I have design High Efficiency, Low Noise, High power density driver for laser diode, size is very compact, PCB: 18mmx14mm with current Up to 6.0Amp.
Also, I am occupied with high density of Proportional Control, Proportional-Integral (PI) Control, Proportional-Integral-Derivative (PID) Control circuits.
I offer you my new designs, PID Controller for TEC, size is very compact, PCB size: 15mmx15mm or diameter 20mm, suitable for various OEM applications.
These products tune or stabilize sensitive optical components in applications that include frequency tunable fiber optic lasers, photo detectors, waveguides and other dense wavelength division multiplexing (DWDM) components.
Two of them I enclosed features of Ultra-compact laser driver with current 6.0 amp and of TEC Controller with current 3.0 amp, which are compatible for laser modules.
NEW ULTRA-COMPACT THERMOELECTRIC COOLER CONTROLLER• Proportional and Integral Control• Peltier Effect (Thermoelectric Coolers) Controllers• High efficiency• Very Low Output Noise• Hybrid Switching Full-Bridge PWM Drive Architecture• High Efficiency H-Bridge Drive Circuits• Gain and Integrator Time Constant set with Single Resistors. • Single Power Supply Operation +2.8 to +5.5 Volts D.C.• Current Limit: 1A, 2A or 3A.• ± 3 Ampere Drive Capability• Independent Cool and Heat Current Limit Adjustments• Temperature Stability Better Than 0.01°C• Thermistor Linearity Correction Compatibility• Temperature Monitoring Output• Maximum TEC Voltage Programmability• Small Size Hybrid Circuit Construction (physical size PCB: 15mmx15mm)The New Temperature Controller is a compact for Thermoelectric Coolers (TEC) used in fixed temperature OEM applications.The device is designed to operate with a negative temperature coefficient (NTC) thermistor that senses the temperature of the object attached to the TEC.Temperature is set with a user selected resistor.Temperature stability of 0.01°C is achieved by the linear PI control loop of the New Temperature Controller.Proportional gain and integrator time constant are set independently with resistors.No external integrator capacitor is needed.These parameters can be optimized to minimize temperature overshoot and stability.In addition, the maximum cooling and heating current supplied to the TEC can be adjusted independently from 0 to 3 amperes with two resistors.The New Temperature Controller is a Full-Bridge thermo-electric cooler (TEC) controller specifically designed for high performance opto-electronic products where precise temperature control is required and can be used for both heating and cooling operations.These products tune or stabilize sensitive optical components in applications that include frequency tunable fiber optic lasers, photo detectors, waveguides and other dense wavelength division multiplexing (DWDM) components.Other applications include microwave transistors in new wireless basestations.The New Temperature Controller uses highly efficient (>90%) pulse width modulation (PWM) technology, allowing the controller to be conveniently mounted near the TEC without adding heat to the system. The New Temperature Controller operates on a single voltage supply, greatly simplifying supply requirements, with an operating frequency that is high enough to eliminate detrimental thermal stresses to the TEC.Vladislav Dremakovdremakov@netvision.net.il
NEW ULTRA-COMPACT LASER DRIVERThis laser driver is capable of delivering up to 6A continuous current at up to 95% efficiency.This laser driver is an integrated, full-featured synchronous switching with output voltage adjustable from 1.0V to 3.8V. The laser driver is APC circuit, CW-mode.The laser driver operates at a constant frequency pulse width modulation (PWM) mode.On-chip resistor less current sensing enables current mode control, which provides cycle-by-cycle current limiting, over-current protection, and excellent step load response. The laser driver features power tracking, which makes the start-up sequencing of multiple converters possible.A junction temperature indicator conveniently monitors the silicon die temperature.The laser driver is specified for operation over the -40°C to +85°C temperature range.The laser driver can supply up to 6A continuous output current without the use of external power devices or externally attached heat sinks, thereby minimizing design effort and overall system cost.On-chip resistor less current sensing is used to achieve stable, highly efficient, current-mode control. An on-board sensor monitors die temperature for over-temperature conditions and can be connected directly to provide automatic thermal shutdown.Features of the laser driver:• 6Amp continuous output current• Small Size Circuit Construction (physical size PCB: 18mmx15mm)• Very Low Output Noise• High efficiency Up to 95% efficiency• Single Power Supply Operation 4.5V to 5.5V (input voltage)• Adjustable output current or output power• Cycle-by-cycle current limit• Precision reference• High switching frequency• Internal soft start• Over voltage and current protection• Junction temperature indicator• Over temperature protection• Under voltage lockout• Multiple supply start-up tracking• Power good indicator
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