Texas Instruments UC2706N

Overview

UC2706N from Texas Instruments is a dual-output, high-speed power MOSFET driver IC with totem-pole outputs capable of ±1.5A peak current per channel, 40ns rise/fall times into 1000pF, and operation across –40°C to +85°C. It supports parallel or push-pull output configurations, features analog latched shutdown with 130mV threshold, internal deadband inhibit, and thermal shutdown at 155°C - used in isolated gate drive circuits for DC-DC converters and motor control inverters.

For engineers reviewing the UC2706N datasheet, UC2706N pinout, UC2706N application, or UC2706N equivalent, key selection considerations include its 16-pin PDIP package, dual TTL-compatible inputs (INV/N.I.), ±500mA steady-state output capability, 20V typical supply voltage operation, and compatibility with PWM controllers like UC1840 in high-reliability industrial power stages.

Technical Context

The UC2706N implements a Schottky-process-based dual-output driver architecture with independent inverting and non-inverting digital inputs, enabling flexible signal polarity acceptance and single-ended-to-push-pull conversion via an internal flip-flop (enabled by grounding Pin 7). Its output stage minimizes cross-conduction spikes using optimized totem-pole timing and includes slow-recovery internal diodes requiring external high-speed shunt diodes for inductive loads.

It integrates three protection layers: pulse-by-pulse current limiting (via VC pin sensing), analog latched shutdown (130mV comparator with 0–(VIN–3V) common-mode range), and thermal shutdown at 155°C. The inhibit circuit uses a user-configurable reference voltage (0.5V–3.5V on Pin 15) to enforce deadband between complementary outputs, critical for bipolar transistor drive safety.

Key Specifications

Pinout & Package

UC2706N is housed in a 16-pin plastic dual in-line package (PDIP-N), with four dedicated ground pins (Pins 4, 5, 12, 13) requiring common connection to minimize ground bounce and ensure stable analog shutdown reference.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output MOSFET driver applications.

Compared with UC2706N, UC3706N offers identical functionality at lower temperature grade and cost, while UC2706DW delivers identical performance in a compact SOIC package - making UC2706N the optimal choice for through-hole prototyping, repair, or industrial systems requiring –40°C cold-start capability.

Availability

UC2706N is available at Aetrix Electronics and suitable for DC-DC converter design, motor control systems, and isolated power supply development requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant through-hole assembly.

Supply support for UC2706N 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 decades of heritage in high-reliability power control ICs.

The UC2706N belongs to TI's UCx706 family of high-speed dual MOSFET drivers, designed specifically for robust gate drive in industrial switch-mode power supplies, motor drives, and welding equipment requiring fault resilience and wide supply voltage tolerance.

FAQ

What is the maximum continuous output current rating for UC2706N?

The UC2706N supports ±500mA steady-state output current per channel under continuous operation at TA = 25°C. This rating ensures reliable drive of MOSFET gates with typical gate charges up to 5nC without thermal derating in well-ventilated enclosures. Peak transient current reaches ±1.5A for short-duration switching events, as confirmed in the Absolute Maximum Ratings table of the SLUS200A datasheet.

Does UC2706N require external pull-up resistors on its digital inputs?

No, UC2706N does not require external pull-up resistors on its INV or N.I. inputs. These are true TTL-compatible inputs with ~1.2V threshold and no hysteresis, designed to operate reliably with standard 5V logic sources. The internal input structure draws –0.6mA to –1.0mA at VI = 0V, providing inherent pull-down behavior that eliminates need for external biasing components.

How does the analog shutdown function work in UC2706N?

The UC2706N analog shutdown is implemented via a latched comparator with 130mV typical threshold on the STOP NON-INV pin (Pin 6). When voltage exceeds this level, the comparator triggers a hardware latch that forces both outputs low until reset by cycling VIN or applying a 200ns minimum off-time. This feature operates independently of the digital control path and responds within 180ns, providing fast fault containment for overcurrent or overtemperature events.

Can UC2706N drive both high-side and low-side N-channel MOSFETs in a half-bridge?

Yes, UC2706N can drive both high-side and low-side N-channel MOSFETs in a half-bridge configuration, provided the high-side gate is referenced to the switching node and driven with appropriate level-shifting or isolated supply. Its dual totem-pole outputs deliver ±1.5A peak current and 20–60ns rise/fall times, enabling efficient switching of MOSFETs with gate charges up to 10nC when paired with external bootstrap or isolated gate supplies.

What is the purpose of Pin 7 (FLIP/FLOP) on UC2706N?

Pin 7 (FLIP/FLOP) on UC2706N enables or disables the internal toggle flip-flop that alternates A and B output states. When grounded, the flip-flop activates, producing complementary push-pull output waveforms ideal for transformer-coupled or center-tapped topologies. When left open, both outputs operate in parallel mode, delivering combined 3.0A peak current for single-ended high-current drive applications.