The 400-W design adjustments 36–60 V to 12 V. It saves energy, works in vehicles, retains output secure and regular.
TIDA-01407 is a reference design from Texas Devices (TI). It’s a 400-W automotive phase-shifted full-bridge converter. It helps a DC enter vary of 36 V to 60 V and offers a 12-V output. The phase-shifted controller contains programmable delays to take care of zero voltage switching (ZVS) throughout totally different circumstances.
The output makes use of synchronous rectification for quick response and vast loop bandwidth. It will probably regulate 12 V at no load with standby energy underneath 100 mW. A transformer offers isolation to forestall shorting between the 48-V battery and the output. The half-bridge gate drivers can deal with as much as 120 V DC boot voltage. This design is utilized in automotive programs equivalent to HEV/EV traction inverters, double-clutch transmissions, management items, and HEV/EV DC-DC converters.
This reference design is utilized in gentle hybrid electrical automobiles (MHEVs). The facility provide makes use of a controller, which permits programmable delays. This helps obtain ZVS throughout totally different working circumstances. On the output facet, synchronous rectifiers are used. These assist a quick response to load adjustments and permit vast loop bandwidth.
The system can preserve the 12 V output regular even with no load, utilizing underneath 100 milliwatts of standby energy. A transformer offers isolation—so if the MOSFETs fail, the 48 V doesn’t attain the output load.
The first facet makes use of half-bridge gate drivers to regulate each excessive and low facet MOSFETs. These drivers can deal with as much as 120 V of boot voltage. The output voltage is regulated by means of the transformer’s major facet, eradicating the necessity for an optocoupler. This helps cut back board dimension and enhance reliability.
The design contains three major components that work collectively to handle energy conversion. The primary half is present sensing on the first facet, which makes use of a present transformer. This offers cycle-by-cycle overcurrent safety and helps with delay management to maintain the system secure.
The second half is the facility stage of the phase-shifted full-bridge on the first facet. This stage makes use of zero-voltage switching and has power-saving modes that regulate based mostly on the load. These options assist enhance effectivity throughout totally different load ranges. The design may deal with automotive circumstances, equivalent to adjustments in voltage from chilly begins or load dumps, which might go as much as 80 V and scale to 100 V.
The third half is using synchronous rectification MOSFETs on the secondary facet. These cut back the voltage drop throughout the MOSFETs. In addition they cut back spikes or dips brought on by load adjustments. They permit quick response and vast loop bandwidth underneath altering circumstances.
TI has examined this reference design. It comes with a invoice of supplies (BOM), schematics, meeting drawing, printed circuit board (PCB) structure, and extra. The corporate’s web site has further knowledge concerning the reference design. To learn extra about this reference design, click on right here.
