5~12V Boost circuit

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1、working principle: Due to the built-in power switch with a large current, 34063 can control the switch current to 1.5A. The internal circuit includes a reference voltage source oscillator, a converter, a logic control circuit, and a switching transistor. Reference voltage source is a bandgap reference with temperature compensation. The oscillation frequency of the oscillator is determined by the external timing capacitor of the 3 pin. The switching transistor is composed of a reverse input terminal of the comparator and a logic control circuit connected with the oscillator, and is provided with a ON, and is composed of a next pulse which is synchronized with the output of the oscillator to be OFF. 2、Function Description: This module is mainly to achieve DC 5V boost to DC 12V; 3、Description of each function module:

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4、Element and PCB plate before welding ;

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5、Physical map after welding ;

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ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price LCSC Assembly Mounted SeeedStudio
1 OUT X2,X1 H2-5.0-10.5X8.0MM 2 GS009S-2P-2 SeeedStudio 320110006
2 150uH L1 Z-150uH 1
3 MC33063_MC34063P U1 DIP8 1
4 1 R1 PR-D2.3XL6.5MM 1 FHCFR-1/4W-000J SeeedStudio 301020004
5 200 R2 PR-D2.3XL6.5MM 1 FHCFR-1/4W-000J SeeedStudio 301020004
6 104 C1,C3 CERAMIC-2.54 2 CC1-F5SL2A101KSPW SeeedStudio 302010208
7 47uF C4 PC-D5.0MM 1 100 SeeedStudio 302030033
8 101 C2 CERAMIC-2.54 1 CC1-F5SL2A101KSPW SeeedStudio 302010208
9 10K R3 PR-D2.3XL6.5MM 1 FHCFR-1/4W-000J SeeedStudio 301020004
10 1.2K R4 PR-D2.3XL6.5MM 1 FHCFR-1/4W-000J SeeedStudio 301020004
11 1N5819 D1 DO-35 1



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