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Texas Instruments UC2705N
- Part No.:
- UC2705N
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
UC2705N.pdf
- Description:
- IC GATE DRVR LOW-SIDE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,193
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Product details
Overview
UC2705N from Texas Instruments is a high-speed dual-input power driver IC designed to interface low-level logic with power MOSFETs in switching applications. It delivers ±1.5 A peak source/sink drive, operates from 5 V to 40 V supply range, features 100 ns propagation delay, and supports both inverting and non-inverting inputs for flexible logic-level acceptance in motor gate drive and DC-DC converter circuits.
For engineers reviewing the UC2705N datasheet, UC2705N pinout, UC2705N application, or UC2705N equivalent, this device is evaluated for high-speed capacitive line driving, thermal-shutdown-protected gate control, and low-cross-conduction current spike performance in industrial power stages requiring robust 8-pin PDIP packaging.
Technical Context
The UC2705N integrates complementary Schottky bipolar circuitry enabling simultaneous high-side and low-side drive capability with independent VS and VC supply rails (5–40 V each). Its dual-input architecture allows logic polarity selection or gating functionality via INV and N.I. inputs, with output state determined by Boolean combination of both signals.
Thermal shutdown activates at 155°C, and cross-conduction current spike duration is limited to 25 ns during output rise transitions. Rise/fall times into 1000 pF load are 40 ns typical, supporting fast-switching power topologies without external bootstrap components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | ±1.5 A - sufficient to directly drive medium-power MOSFET gates without external buffers |
| Supply Voltage Range | 5 V to 40 V on both VS and VC - enables operation across wide input bus voltages in industrial SMPS |
| Propagation Delay | 100 ns - ensures tight timing alignment in high-frequency PWM-driven half-bridge configurations |
| Rise/Fall Time | 40 ns into 1000 pF - minimizes switching losses and EMI in fast-switching power stages |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial ambient conditions without derating |
| Input Logic Compatibility | 0.8 V low / 2.2 V high thresholds - compatible with TTL and CMOS logic families |
| Thermal Shutdown Threshold | 155°C - protects against latch-up and bond-wire failure during overload or poor heatsinking |
Pinout & Package
UC2705N is housed in an 8-pin plastic dual in-line package (PDIP-P), with 0.3-inch body width and standard through-hole footprint. The package supports lead-free (NIPDAU) finish and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INV) | Inverting Input | Active-high logic input that inverts before internal logic combination with N.I. input |
| 2 (N.I.) | Non-Inverting Input | Direct logic input used for gating or strobing the INV path; determines output polarity |
| 3 (GND) | Logic Ground Reference | Common return for digital inputs and internal logic circuitry; separate from power ground |
| 4 (OUT) | Power Output Terminal | High-current push-pull output capable of sourcing/sinking up to ±1.5 A to MOSFET gate |
| 5 (VS) | Power Supply for Output Stage | Drives output transistors; must be decoupled near pin to sustain transient current demands |
| 6 (VC) | Control Supply for Logic & Driver Core | Supplies bias for input comparators and internal logic; independent of VS for level-shifting flexibility |
| 7 (GND) | Power Ground Return | Return path for output current; should be routed separately from logic ground to avoid noise coupling |
| 8 (NC) | No Connect | Internally unused terminal; must remain unconnected per TI design guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Dual Inverting/Non-Inverting Inputs | Enables logic-level selection or gated enable functionality without external inverters or AND gates |
| Low Cross-Conduction Current Spike | 25 ns duration limits shoot-through risk during transition in half-bridge drivers |
| Thermal Shutdown Protection | Auto-recovery after cooling prevents catastrophic failure under sustained overcurrent or overheating |
| 1.5 A Source/Sink Capability | Eliminates need for discrete buffer stages when driving MOSFETs with ≤10 nC gate charge |
| Wide 5–40 V Dual-Supply Operation | Supports direct connection to main rail (VS) and isolated control rail (VC) in isolated DC-DC designs |
Applications
| Motor Gate Drive | DC-DC Converter Control |
|---|---|
|
Use Scenario: Driving high-side and low-side N-channel MOSFETs in brushed DC motor H-bridge controllers. IC Role / Device Role: High-speed gate driver translating PWM logic into bidirectional MOSFET switching with precise dead-time margin. Use Value: ±1.5 A peak drive reduces gate charging time to <100 ns, enabling 100 kHz+ PWM frequencies while maintaining thermal stability. |
Use Scenario: Controlling synchronous rectifier MOSFETs in isolated flyback or forward converters. IC Role / Device Role: Level-shifted gate driver accepting ground-referenced PWM and delivering isolated gate voltage with minimal propagation skew. Use Value: Independent VS/VC supplies allow VC to reference primary-side logic while VS connects to secondary-side rail, eliminating optocoupler latency. |
| Capacitive Line Driver | Industrial Power Switching |
|
Use Scenario: Driving high-capacitance transmission lines in PLC or industrial communication interfaces. IC Role / Device Role: Bidirectional capacitive line driver capable of sourcing/sinking 1.5 A to charge/discharge line capacitance rapidly. Use Value: 40 ns rise/fall into 1000 pF ensures clean signal edges over long traces, reducing jitter and bit error rate. |
Use Scenario: Controlling IGBTs or power MOSFETs in industrial AC motor drives and UPS inverters. IC Role / Device Role: Robust gate driver with thermal shutdown and low quiescent current for continuous-duty power stage control. Use Value: –40°C to +85°C operating range and 155°C thermal cutoff ensure reliability in unventilated enclosures and high-ambient environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed power driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC3705N | Same pinout and function but rated for 0°C to 70°C only; no thermal shutdown hysteresis spec provided | Restricted to commercial-temperature environments; unsuitable for extended industrial ambient | Select UC3705N only if ambient stays within 0–70°C and thermal monitoring is externally implemented |
| TC4427CPA | Single-output, 1.5 A sink/source, no dual-input logic; lacks INV/N.I. gating capability and thermal shutdown | Requires external logic for polarity selection; no built-in overtemperature protection | Choose TC4427CPA when simplified single-input drive suffices and board space favors SOIC-8 over PDIP-8 |
Compared with UC3705N and TC4427CPA, UC2705N uniquely combines industrial temperature range (–40°C to +85°C), integrated thermal shutdown, and dual-input logic gating in a RoHS-compliant PDIP package-making it optimal for ruggedized power stage designs where reliability and configurability are critical.
Availability
UC2705N is available at Aetrix Electronics and suitable for motor gate drive, DC-DC converter control, and industrial power switching applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for UC2705N 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 leader specializing in analog, embedded processing, and power management technologies with over 90 years of innovation in high-reliability analog ICs.
The UC2705N belongs to TI's legacy high-speed power driver family, engineered specifically for robust gate driving in industrial motor controls, switch-mode power supplies, and high-current capacitive interface applications.
FAQ
What is the maximum continuous output current rating for UC2705N?
The UC2705N is rated for ±500 mA steady-state output current per its absolute maximum ratings. While it can deliver ±1.5 A peak transient current, sustained operation above ±500 mA requires careful thermal management and PCB copper area design to maintain junction temperature below 155°C. This rating applies under specified conditions in the SLUS370D datasheet.
Does UC2705N support level-shifting between different supply domains?
Yes, UC2705N supports level-shifting via independent VS and VC supply pins. VS powers the output stage and can connect to a higher-voltage rail (e.g., 24 V motor bus), while VC powers the logic core and may be tied to a lower, isolated 5 V control domain. This separation enables safe interfacing between ground-referenced logic and floating power switches without external isolation components.
Is UC2705N pin-compatible with UC3705N?
Yes, UC2705N and UC3705N share identical 8-pin PDIP (P) package footprints, pin assignments, and functional logic. Both devices use the same INV/N.I./GND/OUT/VS/VC/GND/NC pinout. However, UC2705N is rated for –40°C to +85°C operation and includes defined thermal shutdown behavior, whereas UC3705N is specified only for 0°C to 70°C with no thermal hysteresis data published.
What is the purpose of the NC pin (Pin 8) on UC2705N?
Pin 8 on UC2705N is designated No Connect (NC) and must remain unconnected in all applications. TI documentation confirms this terminal is not bonded internally and serves no electrical function. Soldering or routing to Pin 8 may cause unpredictable behavior or violate internal layout constraints, so it must be left floating per the SLUS370D datasheet recommendations.
Can UC2705N drive both N-channel and P-channel MOSFETs directly?
UC2705N is optimized for driving N-channel MOSFETs in low-side or high-side configurations using external bootstrap or isolated supplies. It does not provide active pull-up for P-channel gate drive and lacks the complementary output structure needed for direct P-channel control. For P-channel high-side drivers, external level-shifting or dedicated P-channel gate drivers are required alongside UC2705N.
UC2705N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Driven Configuration:
- Low-Side
- Channel Type:
- Single
- Number of Drivers:
- 1
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 5V ~ 40V
- Logic Voltage - VIL, VIH:
- 0.8V, 2.2V
- Current - Peak Output (Source, Sink):
- 1.5A, 1.5A
- Input Type:
- Inverting, Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 60ns, 60ns
- Operating Temperature:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
UC2705N FAQ
1.How can I place an order for UC2705N through Aetrix?
Please submit a Request for Quotation (RFQ) for UC2705N 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 UC2705N reliable?
The price and inventory of UC2705N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UC2705N is usually 5 days.
3.What payment methods are accepted for UC2705N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UC2705N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UC2705N?
UC2705N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UC2705N 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 UC2705N?
For technical support, including UC2705N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UC2705N requirements.
6.How does Aetrix verify that UC2705N is sourced from the original manufacturer or authorized distributors?
All UC2705N 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 UC2705N meets industry standards.
7.What is the process for return or replacement of UC2705N?
All UC2705N units undergo pre-shipment inspection (PSI). If there is an issue with UC2705N, 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 UC2705N part is unused and in its original packaging.
Return procedure for UC2705N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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