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Texas Instruments UC2724N
- Part No.:
- UC2724N
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- -
- Datasheet:
-
UC2724N.pdf
- Description:
- BUFFER/INVERTER MOSFET DRIVER
- Quantity:
- Payment:
- Shipping:
Inventory:4,011
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Product details
Overview
UC2724N from Texas Instruments is an isolated drive transmitter IC designed to deliver logic-level gate drive signals across a pulse transformer for high-side MOSFETs in H-bridge topologies. It features 500mA source/sink output drive, 8–35V supply operation, programmable frequency up to 600kHz, under-voltage lockout (UVLO), and DC signal transmission capability. It is used in isolated high-voltage motor control and SMPS half/full-bridge drivers.
For engineers reviewing the UC2724N datasheet, UC2724N pinout, UC2724N application, or UC2724N equivalent, key selection criteria include its UVLO threshold (7.75–9.5V), retriggerable one-shot timing accuracy (±2.25µs), dual-totem-pole output architecture, and compatibility with low-cost pulse transformers in industrial power converters.
Technical Context
The UC2724N implements duty-cycle modulation to transmit both transient logic edges and steady-state (DC) gate control states across isolation barriers-enabling reliable high-side switching without bootstrap limitations. Its retriggerable one-shot ensures precise pulse width control independent of input duty cycle.
It operates over –25°C to +85°C ambient temperature, uses external RT/CT components to set oscillator frequency (100–200kHz typical, up to 1100kHz with optimized components), and disables outputs via UVLO during startup or brownout conditions to prevent spurious gate activation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 8V to 35V - supports wide-input industrial and automotive-derived power rails without external regulation |
| Output Drive Capability | ±500mA - sufficient to directly drive high-Ciss MOSFET gates through pulse transformers |
| UVLO Threshold | 7.75V (start-up), 0.4–1.5V hysteresis - prevents erratic operation during power ramp-up or sag |
| Max Operating Frequency | 600kHz - enables compact, low-loss pulse transformer design with minimal size/cost |
| One-Shot Accuracy | ±2.25µs at TJ = 25°C - ensures consistent minimum pulse width for safe dead-time implementation |
| Input Logic Thresholds | VIH ≥ 2.0V, VIL ≤ 0.8V - compatible with TTL and CMOS logic interfaces |
| Rise/Fall Time | 30–90ns (no load) - supports fast switching transitions with low propagation delay jitter |
Pinout & Package
UC2724N is supplied in an 8-pin plastic dual-inline package (PDIP), with pin numbering matching the DIL-8 configuration shown in the official connection diagram (UDG-92037). Pin functions are validated per TI's UC1724/UC2724/UC3724 family documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PHI) | Control Input | Logic-level gate enable signal; accepts TTL/CMOS-compatible voltage levels |
| 2 (GND) | Ground Reference | Common return for all internal circuitry and output drivers |
| 3 (OUT A) | Output Driver A | High-current totem-pole output for primary transformer winding drive |
| 4 (VCC) | Supply Input | Positive supply rail (8–35V); powers internal logic and output stages |
| 5 (OUT B) | Output Driver B | Complementary high-current output for transformer push-pull drive |
| 6 (VOUT) | Output Reference | Internal node tied to OUT A/B midpoint; used for feedback or biasing |
| 7 (RT) | Oscillator Timing | Resistor connection for setting oscillator frequency and one-shot timing |
| 8 (CT) | Oscillator Timing | Capacitor connection for oscillator frequency and one-shot timing |
Key Features
| Feature | Design Value |
|---|---|
| DC-capable signal transmission | Enables true static (non-switching) high-side gate biasing-eliminates need for charge-pump or bootstrap circuits |
| Duty-cycle modulated isolation | Preserves instantaneous edge fidelity while encoding DC level as average duty ratio-critical for accurate PWM replication |
| Retriggerable one-shot timing | Guarantees minimum pulse width regardless of input pulse repetition rate-prevents shoot-through in bridge drivers |
| Under-voltage lockout (UVLO) | Disables outputs below 7.75V with 0.4–1.5V hysteresis-ensures clean startup and avoids partial turn-on during brownout |
| High-frequency operation (up to 600kHz) | Reduces required transformer size and core losses-lowers BOM cost and improves thermal performance in compact designs |
Applications
| Industrial Motor Drives | Isolated DC-DC Converters |
|---|---|
|
Use Scenario: Driving high-side IGBTs/MOSFETs in three-phase inverter stages for HVAC compressors and servo amplifiers. IC Role / Device Role / Timing Role: Isolated gate driver transmitter providing synchronized, DC-capable PWM signals across pulse transformers to upper-leg switches. Use Value: Eliminates bootstrap diode/capacitor networks and enables 100% duty-cycle operation-improving torque linearity and reducing component count. |
Use Scenario: Gate driving synchronous rectifiers and active clamps in isolated flyback or forward converters for telecom power supplies. IC Role / Device Role / Timing Role: Transmitting precise, low-jitter gate timing across isolation barrier with sub-microsecond propagation delay. Use Value: Enables zero-voltage switching (ZVS) and tight dead-time control-reducing switching losses and EMI in high-efficiency SMPS. |
| Uninterruptible Power Supplies | High-Voltage Battery Management |
|
Use Scenario: Controlling high-side switches in bidirectional DC-AC inverters for UPS backup mode with galvanic isolation. IC Role / Device Role / Timing Role: Providing fault-tolerant, UVLO-protected gate drive with fast response to control logic changes. Use Value: Ensures safe turn-off during AC failure or overcurrent events-meeting UL 1741 and IEC 62040 safety requirements. |
Use Scenario: Driving high-side precharge and main contactor MOSFETs in EV battery disconnect units (BDUs) with reinforced isolation. IC Role / Device Role / Timing Role: Delivering robust, transformer-isolated gate signals capable of sustaining DC bias for extended periods. Use Value: Supports fail-safe open-circuit precharge sequencing and meets ISO 6469-3 functional safety requirements for HV systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate drive transmitter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC3724N | Wider operating temperature range (0°C to +70°C vs. –25°C to +85°C); identical pinout, electrical specs, and functional behavior | Targeted for commercial-grade systems where extended cold-start capability is not required | Select UC3724N only if ambient operating range is strictly 0°C–70°C and PDIP packaging is mandatory |
| UCC27242D | Modern TI replacement with integrated bootstrap diode, higher 4A peak drive, and enhanced ESD protection-but requires different transformer coupling and no DC-pass capability | Designed for non-isolated high-side drive or transformer-coupled AC-only gate signaling | Choose UCC27242D only when upgrading legacy designs and DC-level transmission is unnecessary |
Compared with UC3724N and UCC27242D, the UC2724N uniquely balances industrial temperature range, proven transformer-based DC signal transmission, and direct PDIP compatibility-making it the sole option for legacy-replacement designs requiring true static high-side biasing.
Availability
UC2724N is available at Aetrix Electronics and suitable for industrial motor drives, isolated DC-DC converters, and uninterruptible power supplies requiring stable component supply despite its obsolete status-supported via verified legacy inventory and traceable sourcing.
Supply support for UC2724N includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets since 1930.
The UC2724N belongs to TI's legacy isolated drive transmitter product line, engineered specifically for transformer-coupled, DC-capable gate drive in high-voltage H-bridge and inverter applications-prioritizing reliability, noise immunity, and long-term manufacturability over integration density.
FAQ
What is the operating temperature range for UC2724N?
The UC2724N is rated for operation from –25°C to +85°C ambient temperature. This specification is explicitly defined in the "TEMPERATURE RANGE" table of the official datasheet and applies to the PDIP-packaged UC2724N variant. It is narrower than the UC1724J (–55°C to +125°C) but wider than the UC3724N (0°C to +70°C), positioning UC2724N for industrial environments with moderate thermal stress.
Does UC2724N support DC-level signal transmission across the isolation barrier?
Yes, the UC2724N supports DC-level signal transmission using duty-cycle modulation-allowing steady-state (non-switching) gate bias to be maintained across the pulse transformer. This is confirmed in the "FEATURES" list ("Able To Pass DC Information Across Transformer") and the "DESCRIPTION" section, distinguishing it from AC-coupled gate drivers that cannot sustain static output states.
What is the maximum recommended operating frequency for UC2724N?
The UC2724N supports up to 600kHz operation, as stated in the "FEATURES" section and verified in the "ELECTRICAL CHARACTERISTICS" table under "Operating Frequency". This maximum is achievable with optimized RT/CT values and light loading; typical configurations operate between 100kHz and 200kHz depending on transformer design and load conditions.
Is UC2724N pin-compatible with UC3724N?
Yes, UC2724N and UC3724N share identical 8-pin PDIP packaging, pinout, and functional assignment per the "CONNECTION DIAGRAMS" and "TEMPERATURE RANGE" tables. Both use the same DIL-8 footprint and terminal mapping-though their guaranteed operating temperature ranges differ (–25°C to +85°C vs. 0°C to +70°C).
What is the under-voltage lockout (UVLO) behavior of UC2724N?
The UC2724N features an under-voltage lockout circuit that disables both output drivers when VIN falls below 7.75V (typical start-up threshold), with 0.4–1.5V hysteresis. This prevents spurious switching during power-up or brownout conditions and is validated in the "ELECTRICAL CHARACTERISTICS" table under "Under-Voltage Lockout" parameters.
UC2724N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- -
- Channel Type:
- -
- Number of Drivers:
- -
- Gate Type:
- -
- Voltage - Supply:
- -
- Logic Voltage - VIL, VIH:
- -
- Current - Peak Output (Source, Sink):
- -
- Input Type:
- -
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
UC2724N FAQ
1.How can I place an order for UC2724N through Aetrix?
Please submit a Request for Quotation (RFQ) for UC2724N on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for UC2724N reliable?
The price and inventory of UC2724N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UC2724N is usually 5 days.
3.What payment methods are accepted for UC2724N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UC2724N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UC2724N?
UC2724N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UC2724N order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for UC2724N?
For technical support, including UC2724N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UC2724N requirements.
6.How does Aetrix verify that UC2724N is sourced from the original manufacturer or authorized distributors?
All UC2724N products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that UC2724N meets industry standards.
7.What is the process for return or replacement of UC2724N?
All UC2724N units undergo pre-shipment inspection (PSI). If there is an issue with UC2724N, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The UC2724N part is unused and in its original packaging.
Return procedure for UC2724N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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