{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM5039MH/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM5039MH-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM5039MH-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM5039MH%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM5039MH/NOPB half-bridge PWM controller, 13V to 105V supply, 200kHz/500kHz switching, synchronous rectification, 20-PowerTSSOP package, -40°C to 125°C.","salesMarkdown":"## What the 105V supply range means for your bus The LM5039MH/NOPB runs from a 13V to 105V supply rail — that covers 24V industrial, 48V telecom, and 72V railway auxiliary buses without an external pre-regulator. The 105V upper end also handles the 100V transient peaks common on 48V PoE and battery-backed rails. Because the controller is a half-bridge topology with step-up/step-down capability, it can regulate an output voltage that sits above or below the input. That makes it a fit for wide-input-range designs where the bus voltage swings — say, a 36V–72V telecom input that must produce a 48V or 12V output. ## Switching frequency and the transformer trade-off The oscillator runs at either 200kHz or 500kHz — the lower frequency keeps switching losses down and lets you use a larger, more efficient transformer core; the higher frequency shrinks the magnetics at the cost of higher FET gate-drive losses. Both frequencies are set by a single resistor to ground, no external capacitor needed. Clock Sync lets you synchronise multiple LM5039 controllers to the same external clock — useful when paralleling half-bridge stages or when the switching noise must sit at a known frequency to avoid beating with the downstream converter's switching. ## Package and board-fit for the rework bench The 20-PowerTSSOP (4.40mm width) has an exposed thermal pad on the bottom — the HTSSOP package. The pad also makes hand-rework straightforward with a hot-air station if the board has a bottom-side via array to wick heat away. The output is a single transistor driver with isolation-capable positive configuration — it drives the primary-side MOSFETs through a pulse transformer or an optocoupler for galvanic isolation. Synchronous rectification is built in, so the secondary-side SR FETs can be driven directly without an extra controller. ## Lifecycle and compliance at a glance It is ROHS3 compliant (no exemptions that are phasing out), so it fits current EU and China RoHS requirements without a waiver.","metaTitle":"Texas Instruments LM5039MH/NOPB Half-Bridge PWM Controller","metaDescription":"Texas Instruments LM5039MH/NOPB half-bridge PWM controller, 13V-105V supply, 200/500kHz switching, -40°C to 125°C, 20-HTSSOP. Active, ROHS3. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tube","Function":"Step-Up/Step-Down","Topology":"Half-Bridge","Clock Sync":"Yes","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"20-PowerTSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Control Features":"Frequency Control, Ramp, Soft Start","Number of Outputs":"1","Output Configuration":"Positive, Isolation Capable","Frequency - Switching":"200kHz, 500kHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Supplier Device Package":"20-HTSSOP","Voltage - Supply (Vcc/Vdd)":"13V ~ 105V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.45","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.45000","currency":"USD"},{"qty":10,"price":"$4.89400","currency":"USD"},{"qty":25,"price":"$4.62680","currency":"USD"},{"qty":100,"price":"$4.01000","currency":"USD"},{"qty":250,"price":"$3.80432","currency":"USD"},{"qty":500,"price":"$3.41362","currency":"USD"},{"qty":1000,"price":"$2.91000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7a3961dc8b18f642678b0694d6c7d2d9.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM5039MH-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM5039MH-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}