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
Key Features
- 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
Applications
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.
Specifications
| 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 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the input voltage range for the UC3846QTRG3?
The UC3846QTRG3 operates with an input voltage range from 7.25V minimum to 40V maximum, with a nominal operating voltage of 15V. This wide range makes it compatible with 12V and 24V bus systems commonly used in industrial and telecommunications power conversion applications.
What control mode does the UC3846QTRG3 use?
The UC3846QTRG3 uses current-mode pulse-width modulation control, which senses the inductor or primary current on a cycle-by-cycle basis to limit peak current. This provides inherent short-circuit protection, simpler control loop design, and improved power supply line rejection compared to voltage-mode PWM.
What package does the UC3846QTRG3 come in?
The UC3846QTRG3 is packaged in a 20-pin Plastic Leaded Chip Carrier (PLCC) surface-mount package (JESD-30 code S-PQCC-J20). This package supports automated PCB assembly and offers a compact footprint suitable for high-density power supply board designs.
Is the UC3846QTRG3 RoHS compliant?
Yes, the UC3846QTRG3 is listed as Pb-free (lead-free) and carries a JESD-609 code of e3, indicating compliance with RoHS environmental regulations. This makes it suitable for use in products destined for markets with strict environmental compliance requirements.
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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.
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