1. Programmable Power Supply Characterization presentation Dec. 04, 2007 Gregory Kaplan Dmitry Babin Supervisor: Boaz Mizrahi

2. Project Overview A versatile power supply unit with multiple outputs for laboratory use and testing of various electronic devices.

3. Project Overview Power supply unit capabilities –Variable source/sink operation –Four independent outputs –Configurable current limits –Fast load transient simulation –DRAM-like power consumption simulation –Two-way communication with a PC Design principles –Digital control –Modularity

4. Specifications Source operation Source operation –Output voltage: 0.9 to 12 V –Output current: 0 to 3.5 A –Programming resolution: < 5 mV –Ripple and noise: < 20 mV peak-to-peak –Settling time: <1ms Load operation Load operation –Input current: 0 to 3.5 A –Programming resolution: < 1 mA –Fast (< 100 ns) load transient simulation

5. High-level overview Active load Power supply Control unit User interface for standalone operation LCDKeysLEDs User interface DUTDUT Measurement unit

6. Some more details Battery + charger User interface Variable electronic load FPGA Current sense AC to DC converter Variable DC to DC converter Voltage sense MCU 4× LCDKeysLEDs PC datacontrolpower Line

7. Timetable Nov 18 Nov 25 Dec 02 Dec 09 Dec 16 Dec 23 Dec 30 Jan 06 Jan 13 Jan 20 Jan 27 Feb 03 Feb 10 Feb 17 Feb 24 Mar 02 Mar 09 Mar 16 Mar 23 Mar 30 Survey and characterization Detailed design Components selection Schematics Pin-to-pin diagrams Layout Board design Board assembly Software characterization Initial tests Presentation We are here Mid semester report Bill of materials is done Layout is ready End of project A

8. Questions ?