SWITCH MODE POWER SUPPLY TRAINER MODULES

3. Do it yourself SMPS [ITB-PSS02] [VSMP-006] [SMPS TRAINER # 2]

           A separate Module "Do it yourselves SMPS" - (VSMP-006) will be very useful for hands on experience for the students, after going through the 5 SMPS training Modules. The circuitry of a forward converter SMPS is divided into the sections or modules as follows. i) Rectifier & Filter section, ii) PWM section , iii) Power switching section , iv) Output Rectifier & filter section. Each Module is housed in a separate PCB with all inputs & output points are terminated at connectors so that all modules can be inter connected by students to understand each section of the SMPS. The students can interconnect SMPS circuitry stage by stage, test each stage, so that they achieves complete knowledge on SMPS technology. 

                                            d. Output Rectifier & Filter Section

                                            e. SMPS INPUT MODULE [VSMP - 007]

4 Diodes of 600volt/2 Amps provided to form full Bridge

One Filter capacitor at the output of Bridge provided to filter the DC ripple.

One SPDT switch provided to disconnect the DC filter capacitor to study the effect of filter

Forward converter with voltage mode control

TL 494 IC as PWM controller

One Isolation Transformer provided to isolate PWM pulse from the power circuit

5 Test points provided

c. Power switching Section                                                                                  [TOC]

MOSFET (800 volt/ 4 Amp Rating) as Power Switching Device

Switching Frequency : 25 KHz

SMPS Transformer

d. Output Rectifier & Filter Section                                                                      [TOC]

Output voltage : 5 volt @ 1 Amps

One Toraidal core Inductor filter

e. SMPS INPUT MODULE [VSMP - 007]                                                                 [TOC]

230 Volt AC input

Provided with step down Transformer for 15/48 Volt AC input to all SMPS Modules

AC output : 15/48 Volt @ 2 Amp

DC output : + 12 Volt @ 200 mA

DC voltage is used for all SMPS trainer modules to power the PWM Controller.