UC3846QTRG3 Texas Instruments Integrated Circuit (Plastic Leaded Chip Carrier) In Stock
The UC3846QTRG3 is a current-mode PWM switching controller supporting input voltages from 7.25V to 40V in a 20-pin PLCC package. It uses pulse-width modulation with current-mode control for high-efficiency power conversion in DC-DC converter designs. From $2.50 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Plastic Leaded Chip Carrier
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- UC3846QTRG3 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of UC3846QTRG3?
- Current-mode PWM control with cycle-by-cycle current limiting provides inherent overcurrent protection and fast transient response
- Wide input voltage range from 7.25V to 40V (nominal 15V) supports diverse power conversion topologies including forward and flyback converters
- 20-pin PLCC surface-mount package enables compact, automated PCB assembly for high-density power supply boards
- RoHS-compliant (Pb-free) construction meets modern environmental standards for industrial and commercial power supply applications
What is UC3846QTRG3 used for?
The UC3846QTRG3 is used in current-mode controlled DC-DC power converters for industrial power supplies, telecommunications equipment, and server power systems requiring reliable regulation across wide input voltage ranges. Its PWM control architecture with current-mode feedback simplifies loop compensation and improves transient response in offline and isolated converter designs. The device also finds application in motor drive pre-converters and battery charging systems where precise current control and robust overcurrent protection are critical.
What are the specifications of UC3846QTRG3?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 40V |
| Input Voltage-Min | 7.25V |
| Input Voltage-Nom | 15V |
| JESD-30 Code | S-PQCC-J20 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 0.5A |
| Output Voltage-Max | 5.2V |
| Output Voltage-Min | 5V |
| Output Voltage-Nom | 5.1V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LDCC20,.4SQ |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 500kHz |
| Technology | BICMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | MATTE TIN |
| Terminal Form | J BEND |
| Terminal Pitch | 1.27mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Plastic Leaded Chip Carrier |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the UC3846QTRG3 datasheet?
UC3846QTRG3 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for UC3846QTRG3?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Which supply range should power designers allow for UC3846QTRG3?
UC3846QTRG3 is listed with a 7.25 V minimum and 40 V maximum input range, with 15 V nominal operation for current-mode PWM converter control circuits.
How does current-mode PWM control help DC-DC converter designs?
The controller uses pulse-width modulation with current-mode control, letting designers regulate switching converters while monitoring current behavior across a 7.25 V to 40 V input span.
Which packaging constraint affects layout and sourcing for this controller?
The fetched context identifies a 20-pin PLCC package and S-PQCC-J20 JESD-30 code, so PCB footprints and alternates should preserve that mechanical format.
Before BOM release, what traceability details should buyers check for this TI part?
Buyers should confirm the Pbfree Code is Yes, the JESD-609 finish code is e3, and the ordered device matches the 20-pin PLCC controller requirement.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit