LM5039SQX/NOPB Texas Instruments Integrated Circuit (Quad Flat No-Lead) In Stock
The LM5039SQX/NOPB is a half-bridge PWM switching controller IC from Texas Instruments in a 24-pin QFN package, featuring voltage-mode control with 13V to 15V gate bias supply and optimized for 48V bus telecom and industrial DC-DC half-bridge converter topologies. Designed for high-power isolated power supplies. Available from stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat No-Lead
- Pin Count
- 25
- Lifecycle
- ACTIVE
- Datasheet
- LM5039SQX/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.9600(MOQ 500)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM5039SQX/NOPB?
- Voltage-mode PWM control optimized for half-bridge topology enabling symmetrical push-pull switching at 48V bus voltages common in telecom and server power systems
- Narrow 13V to 15V gate drive supply range with internal voltage regulators providing reliable high-side and low-side gate drive for half-bridge FET switches
- 24-pin QFN package (R-XQCC-N24) with exposed thermal pad for efficient heat dissipation in compact high-power DC-DC converter designs
- Integrated half-bridge gate driver with deadtime control preventing shoot-through and enabling synchronous rectification in isolated DC-DC converters
What is LM5039SQX/NOPB used for?
The LM5039SQX/NOPB is designed for controlling half-bridge DC-DC converter stages in 48V telecom rectifiers, server power supplies, and industrial power conversion systems where high efficiency and galvanic isolation are required. Its voltage-mode PWM architecture simplifies loop compensation for transformer-isolated power stages, making it suitable for full-load efficiency optimization in data center and networking equipment power supplies. The IC is also used in battery charger topologies, motor drive gate driver stages, and resonant half-bridge converters for LED street lighting and renewable energy inverters.
What are the specifications of LM5039SQX/NOPB?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 15V |
| Input Voltage-Min | 13V |
| Input Voltage-Nom | 48V |
| JESD-30 Code | R-XQCC-N24 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | LCC20,.16X.2,20 |
| Package Shape | RECTANGULAR |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 6mA |
| Supply Voltage-Max (Vsup) | 15V |
| Supply Voltage-Min (Vsup) | 8V |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 2000kHz |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the LM5039SQX/NOPB datasheet?
LM5039SQX/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM5039SQX/NOPB?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the LM5039SQX/NOPB and what topology does it control?
The LM5039SQX/NOPB is a half-bridge PWM switching controller IC from Texas Instruments. It is specifically designed to control half-bridge DC-DC converter topologies commonly used in 48V telecom bus power supplies, server power conversion stages, and industrial isolated DC-DC converters requiring symmetrical switch timing and integrated gate drive for both high-side and low-side power FETs.
What is the input voltage range of the LM5039SQX/NOPB?
The LM5039SQX/NOPB has a gate drive supply input voltage range of 13V minimum to 15V maximum, with a nominal operating voltage specification of 48V referring to the power stage bus voltage it is designed to control. The narrow 13V–15V gate supply window indicates it is used in conjunction with a separate 15V bias supply rail, which is standard practice in 48V half-bridge converter designs.
What control method does the LM5039SQX/NOPB use?
The LM5039SQX/NOPB uses voltage-mode pulse width modulation (PWM) control, where the output voltage error signal directly modulates the duty cycle of both half-bridge switches. Voltage-mode control simplifies the compensation network design for transformer-isolated topologies and provides predictable loop gain characteristics across the full load range of telecom and server power applications.
What package does the LM5039SQX/NOPB come in?
The LM5039SQX/NOPB is housed in a 24-pin QFN package (JESD-30 code R-XQCC-N24) with an exposed thermal pad on the bottom for improved heat dissipation. The /NOPB suffix confirms RoHS compliance and lead-free construction. The compact QFN footprint reduces PCB area compared to SOIC or DIP alternatives while providing superior thermal performance for high-power switching controller applications.
What are typical applications for the LM5039SQX/NOPB?
Typical applications include 48V telecom rectifier half-bridge stages, server power supply isolated DC-DC converters, industrial motor drive gate driver controllers, battery charger converter stages, LLC resonant half-bridge controllers for high-efficiency LED power supplies, and any isolated power conversion design requiring a dedicated half-bridge PWM controller with integrated gate drive and deadtime management in the 48V bus power distribution segment.
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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
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 500+ | $5.0300 | $2515.00 |
| 2000+ | $4.8100 | $9620.00 |
| 4500+ | $2.9600 | $13320.00 |
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