Exact device and ordering identity
UCD3138064RJAR is the 40-contact RJA ordering version of the UCD3138064 digital controller used to manage isolated power-supply feedback and switching timing. It is a programmable control IC, not a power module with integrated output FETs. Its 40-pin assembly and pin allocation must be assessed separately from the 64-pin UCD3138064A controller orderables.
Operating and control considerations
Firmware can use the device’s 64 kB total program flash, three independent control-loop capability and up to eight DPWM timing outputs. The 250 ps pulse-width resolution describes PWM timing granularity, not ADC accuracy or delivered output current. Similarly, the up-to-2 MHz switching figure is a configurable control limit whose feasibility depends on the complete converter and firmware.
Package, sourcing and engineering trade-offs
A buyer comparing RJA with RGC part numbers should check the complete suffix, package body and terminal mapping. The different pin counts and differing A versus non-A variant identity mean that a part-family match is not a footprint or code-compatibility guarantee. For a sourcing decision, specify the required firmware image, program interfaces, exact TI orderable and package details.
Manufacturer-verified selection specifications
| Selection parameter | TI-verified value | Engineering condition |
|---|---|---|
| Function | highly integrated controller for isolated power | External power stage required |
| Program memory | 64kB flash dual 32kB banks | Separate program flash banks, firmware-specific design |
| Feedback loops | up to 3 independent feedback loops | Requires control code |
| Dpwm | up to 8 DPWM outputs | Power stage switching control outputs, not driver current capability |
| Dpwm resolution | 250ps resolution | DPWM width resolution not duty cycle accuracy |
| Switch limit | up to 2MHz | Controller timing constraint |
| Package | RJA 40pin VQFN | Use RJA package drawing; 64pin package not same land pattern |
| Catalog package | VQFN-40(6×6) | Match exact TI mechanical drawing before footprint or replacement approval |
For a 64-contact VQFN RGC option in the A-version controller family, compare UCD3138064ARGCR. The 40-contact RJA non-A UCD3138064 on this page needs its own pinout, communication-port and firmware verification; the A version adds communication resources, and changing from 40 to 64 pins requires PCB redesign rather than direct substitution.
Procurement and datasheet
Request a quotation for UCD3138064RJAR using the complete orderable number, target quantity and package requirement. Stock, pricing and delivery timing are not guaranteed by this product page. Source-listed alternative candidates, where present, are for engineering evaluation and do not establish drop-in compatibility.
