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Texas Instruments UC3706DW
- Part No.:
- UC3706DW
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UC3706DW.pdf
- Description:
- IC GATE DRVR LOW-SIDE 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:768
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Product details
Overview
UC3706DW from Texas Instruments is a dual-output, high-speed power MOSFET driver IC with totem-pole outputs capable of sourcing/sinking 1.5A peak per channel, 40ns rise/fall times into 1000pF, and operation across 5–40V supply range. It supports parallel or push-pull output configurations and integrates analog latched shutdown, thermal protection, and internal deadband inhibit - used in DC-DC converter gate drive circuits requiring precise timing and robust fault handling.
For engineers reviewing the UC3706DW datasheet, UC3706DW pinout, UC3706DW application, or UC3706DW equivalent, key selection considerations include its SOIC-16 (DW) package, 0°C to +70°C operating range, dual-input logic compatibility (INV/N.I.), and capability to convert single-ended PWM signals into high-current push-pull drive for synchronous rectification stages.
Technical Context
The UC3706DW implements a Schottky bipolar process with dual totem-pole outputs driven by either inverting or non-inverting digital inputs, enabling flexible interface with TTL-level controllers. Its internal flip-flop (enabled via Pin 7) allows alternating output states for push-pull operation, while open-pin 7 configures parallel mode for 3.0A combined drive.
Protection architecture includes pulse-by-pulse current limiting via external sensing, analog shutdown with 130mV threshold referenced to ground, and thermal shutdown at 155°C. The device features low cross-conduction current spike (<25ns duration), 200ns minimum input off-time requirement for flip-flop reset, and 5V internal regulator enabling stable operation down to 5V VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current (Peak) | ±1.5A per channel - enables direct drive of medium-power MOSFETs without external buffers |
| Rise/Fall Time | 20–60ns into 1000pF - ensures fast switching for high-frequency DC-DC topologies up to ~1MHz |
| Supply Range (VIN/VC) | 5V to 40V - supports wide-input industrial and automotive auxiliary supplies |
| Operating Temperature | 0°C to +70°C - specified for commercial-grade power conversion applications |
| Input Logic Compatibility | TTL-compatible thresholds (0.8V low / 2.2V high) - interfaces directly with microcontrollers and PWM ICs |
| Analog Shutdown Threshold | 130mV common-mode range (GND to VIN–3V) - provides fast, latchable overcurrent detection near power stage |
| Thermal Shutdown | 155°C - protects against sustained overload or poor heatsinking in enclosed environments |
Pinout & Package
UC3706DW is housed in a 16-pin SOIC (DW) package with 1.27mm pitch, gull-wing leads, and RoHS-compliant NiPdAu finish. All four ground pins (Pins 4, 5, 12, 13) must be connected to a common system ground for proper operation and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | Inhibit Inputs (A/B) | Enable/disable respective outputs independently; threshold set by Pin 15 reference voltage |
| 2 | Inverting Input (INV) | Accepts active-low logic; drives both outputs in complementary fashion when flip-flop enabled |
| 3 | Non-Inverting Input (N.I.) | Accepts active-high logic; alternate control path with same functional routing as INV |
| 6, 11 | Outputs (A/B) | High-current totem-pole outputs; each sources/sinks up to 1.5A peak; paralleled in default mode |
| 7 | Flip/Flop Enable | Grounding enables alternating output states; open-circuit configures parallel operation |
| 8, 9, 14, 15 | Ground / Reference | Pins 4,5,12,13 = GND; Pin 15 = Inhibit Ref; Pin 8/9/14 = additional GND connections |
| 10 | Stop Non-Inverting | Analog shutdown input; latches outputs low upon overcurrent detection above 130mV |
| 15 | Inhibit Reference | Adjustable threshold (0.5–3.5V) for digital inhibit function; sets trip point for Pins 1 & 16 |
Key Features
| Feature | Design Value |
|---|---|
| Dual 1.5A Totem-Pole Outputs | Eliminates need for discrete buffer stages when driving MOSFETs with Qg ≤ 50nC in 300kHz–1MHz converters |
| Internal Flip-Flop Control | Enables true push-pull operation without external logic; reduces component count in half-bridge gate drivers |
| Analog Latched Shutdown | Provides sub-200ns response to overcurrent events at the power stage, improving system reliability vs. delayed digital monitoring |
| Low Cross-Conduction Spike | 25ns max spike duration minimizes shoot-through risk during transition in synchronous rectifiers and motor drivers |
| Thermal Shutdown Protection | Self-resetting protection at 155°C prevents permanent damage during transient overload or ambient temperature excursions |
Applications
| DC-DC Synchronous Rectifier Drive | Half-Bridge Motor Gate Driver |
|---|---|
Use Scenario: Driving high-side and low-side N-channel MOSFETs in buck or forward converters with synchronous rectification. IC Role / Device Role / Timing Role: Converts single-ended PWM signal into complementary, dead-time-controlled gate drive with integrated analog fault shutdown. Use Value: Enables >95% efficiency at 500kHz switching by eliminating body-diode conduction loss and providing fast, matched turn-on/turn-off timing. | Use Scenario: Controlling brushed DC or stepper motor H-bridge with bidirectional current flow and regenerative braking. IC Role / Device Role / Timing Role: Provides isolated, high-current gate drive to two opposing MOSFET pairs with independent inhibit and analog stop inputs. Use Value: Supports rapid direction reversal and current-limiting torque control via analog shutdown input tied to current-sense amplifier output. |
| Isolated Flyback Transformer Drive | Industrial SMPS Auxiliary Supply Driver |
Use Scenario: Driving primary-side MOSFETs in transformer-coupled flyback or forward converters where isolation and timing precision are critical. IC Role / Device Role / Timing Role: Accepts isolated PWM signal and delivers high-current, low-jitter gate drive with built-in cross-conduction suppression. Use Value: Reduces EMI and improves regulation stability by minimizing overlap between primary switch transitions and secondary rectifier conduction. | Use Scenario: Powering auxiliary rails (e.g., 12V → 5V/3.3V) in PLCs, HMIs, and industrial controllers requiring long-term reliability. IC Role / Device Role / Timing Role: Acts as main gate driver in compact, fanless AC-DC or DC-DC modules with thermal and overcurrent protection embedded at silicon level. Use Value: Extends product lifetime by eliminating external protection components and reducing thermal stress on MOSFETs during line transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output MOSFET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC2706DW | Same SOIC-16 package and pinout; wider –40°C to +85°C temp range; identical electrical specs except operating temp | Suitable for extended-temperature industrial environments where UC3706DW's 0°C lower limit is insufficient | Select UC2706DW when ambient temperature may drop below 0°C but full military-grade spec is unnecessary |
| UCC27201D | Modern TI replacement: 4A peak drive, 12ns propagation delay, 5V–16V supply only; no analog shutdown or flip-flop | Lacks latched analog shutdown and internal flip-flop; requires external logic for push-pull sequencing | Choose UCC27201D for higher-speed, lower-voltage designs where integrated protection and legacy compatibility are secondary to raw speed |
Compared with UC2706DW and UCC27201D, UC3706DW offers unique value in cost-sensitive commercial power supplies needing analog fault latching, thermal shutdown, and configurable push-pull/parallel operation - all within a mature, widely documented SOIC-16 footprint.
Availability
UC3706DW is available at Aetrix Electronics and suitable for DC-DC converter design, industrial motor control, and isolated power supply development requiring stable component supply, long-lifecycle support, and proven field reliability.
Supply support for UC3706DW 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 personal electronics markets.
The UC3706DW belongs to TI's legacy UCx706 family of high-speed bipolar MOSFET drivers, designed specifically for robust, low-cost gate drive in commercial-grade switched-mode power supplies and motor control systems.
FAQ
What is the maximum continuous output current rating for UC3706DW?
The UC3706DW is rated for ±500mA steady-state output current per channel under continuous operation. Its ±1.5A peak rating applies to transient conditions such as MOSFET gate charging, with pulse width and duty cycle limited by thermal dissipation in the SOIC-16 package. Derating is required above 25°C ambient per the 1W power dissipation limit at TA = 25°C.
Does UC3706DW support push-pull operation without external components?
Yes, UC3706DW supports true push-pull operation internally via its flip-flop circuit. Grounding Pin 7 activates the flip-flop, causing the two outputs to alternate states on each input edge. No external logic or timing components are needed - the device handles state sequencing, deadband control, and output synchronization autonomously.
Can UC3706DW be used with 5V-only supply rails?
Yes, UC3706DW operates with VIN as low as 5V, though the datasheet notes slight response time degradation compared to 20V operation. At VIN = 5V, the internal 5V regulator remains functional, and all logic thresholds and output drive capabilities are preserved. However, VC must still be ≥5V to ensure full output swing and current capability.
How does the analog shutdown feature of UC3706DW differ from digital inhibit?
The analog shutdown input (Pin 10) triggers a latched, irreversible output disable until power cycle or reset, using a 130mV comparator referenced to ground. Digital inhibit (Pins 1/16) provides momentary, reversible output disable synchronized to input logic. Analog shutdown responds faster (<180ns) and is intended for critical overcurrent protection close to the power stage, while digital inhibit serves for system-level enable/disable control.
Is UC3706DW pin-compatible with UC2706DW?
Yes, UC3706DW and UC2706DW share identical SOIC-16 (DW) packaging, pinout, and electrical functionality. The only differences are operating temperature range (0°C–70°C vs. –40°C–85°C) and minor internal process optimizations. They are direct drop-in replacements in commercial applications where extended temperature range is not required.
UC3706DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Low-Side
- Channel Type:
- Independent
- Number of Drivers:
- 2
- 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):
- 40ns, 30ns
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
UC3706DW FAQ
1.How can I place an order for UC3706DW through Aetrix?
Please submit a Request for Quotation (RFQ) for UC3706DW 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 UC3706DW reliable?
The price and inventory of UC3706DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UC3706DW is usually 5 days.
3.What payment methods are accepted for UC3706DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UC3706DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UC3706DW?
UC3706DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UC3706DW 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 UC3706DW?
For technical support, including UC3706DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UC3706DW requirements.
6.How does Aetrix verify that UC3706DW is sourced from the original manufacturer or authorized distributors?
All UC3706DW 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 UC3706DW meets industry standards.
7.What is the process for return or replacement of UC3706DW?
All UC3706DW units undergo pre-shipment inspection (PSI). If there is an issue with UC3706DW, 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 UC3706DW part is unused and in its original packaging.
Return procedure for UC3706DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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