ON Semiconductor

Dual High Side Switch with Adjustable Current Limit and Diagnostic Features

The TL494 PWM Controller incorporates all the functions required in the construction of a pulse width modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application.The TL494 PWM Controller contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits.The error amplifiers exhibit a common-mode voltage range from -0.3 V to VCC -2 V. The dead-time control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can drive the common circuits in synchronous multiple-rail power supplies.The uncommitted output transistors provide either common-emitter or emitter-follower output capability. This PWM Controller provides for push-pull or single-ended output operation, which can be selected through the output-control function. The architecture of this device prohibits the possibility of either output being pulsed twice during push-pull operation.The TL494C PWM Controller is characterized for operation from 0C to 70C. The TL494I is characterized for operation from -40C to 85C. The TL494B is characterized for operation from -40C to 125C. The NCV494B is characterized for -40C to 125C and certified for automotive applications.

The NCV4949A is a monolithic integrated 5.0 V voltage regulator with a very low dropout and additional functions such as reset and an uncommitted voltage sense comparator. It is designed for supplying microcontroller/microprocessor controlled systems particularly in automotive applications. The NCV4949A has improved reset behavior for lower input and output voltage levels.

The NCV51152 is a family of isolated single-channel gate driver with 4.5-A/9-A source and sink peak current respectively. They are designed for fast switching to drive power MOSFETs, and SiC MOSFET power switches. The NCV51152 offers short and matched propagation delays. The NCV51152xA provides a split output that controls the rise and fall times individually. The NCV51152xB has its VCC UVLO referenced to GND2 to get a true UVLO. The NCV51152 is available in a 4 mm SOIC-8 package and can support isolation voltage up to 3.75 kVRMS.

NCV51313 is a 130 V high side driver with 2.0 A source and 3.0 A sink drive capability for DC−DC power supplies and inverters. NCV51313 offers best in class propagation delay, low quiescent current and low switching current at high frequencies of operation. This device is tailored for highly efficient power supplies operating at high frequencies. NCV51313 is offered in two versions, NCV51313A/B. NCV51313A has a typical 50 ns propagation delay, while NCV51313B has a typical propagation delay of 20 ns. NCV51313 comes in DFNW6 3 x 3 or standard SO8 package.

The NCV51411 is a 1.5A buck regulator IC operating at a fixed-frequency of 260 kHz. The device uses V2 control architecture to provide unmatched transient response, optimum overall regulation and simple loop compensation. The NCV51411 accommodates input voltages from 4.5V to 40V and includes an input for synchronization to an external oscillator. NCV51411 is certified for Automotive applications, and is also available in commercial grade as CS51411.

The NCV51563 are isolated dual-channel gate drivers with 4.5-A/9-A source and sink peak current respectively. They are designed for fast switching to drive power MOSFETs, and SiC MOSFET power switches. The NCV51563 offers short and matched propagation delays. Two independent and 5 kVRMS (UL1577 rating) galvanically isolated gate driver channels can be used in any possible configurations of two low side, two high-side switches or a half-bridge driver with programmable dead time. An enable pin shutdown both outputs simultaneously when is set low. The NCV51563 offers other important protection functions such as independent under-voltage lockout for both gate drivers and enable function.

The NCV51705 driver is designed to primarily drive SiC MOSFET transistors. To achieve the lowest possible conduction losses, the driver is capable to deliver the maximum allowable gate voltage to the SiC MOSFET device. By providing high peak current during turn−on and turn−off, switching losses are also minimized. For improved reliability, dV/dt immunity and even faster turn−off, the NCV51705 can utilize its on−board charge pump to generate a user selectable negative voltage rail.For isolated applications, the NCV51705 also provides an externally accessible 5 V rail to power the secondary side of digital or high speed opto isolators.

The NCV5171/73 products are 280 kHz/560 kHz boost regulators with a high efficiency, 1.5 A integrated switch. The part operates over a wide input voltage range, from 2.7 V to 30 V. The flexibility of the design allows the chip to operate in most power supply configurations, including boost, flyback, forward, inverting, and SEPIC. The IC utilizes current mode architecture, which allows excellent load and line regulation, as well as a practical means for limiting current. Combining high frequency operation with a highly integrated regulator circuit results in an extremely compact power supply solution. The circuit design includes provisions for features such as frequency synchronization, shutdown, and feedback controls for positive voltage regulation. These parts are pin-to-pin compatible with LT1372/1373 and are the automotive versions of CS5171 and CS5173.

The NCV51752 is a family of isolated single-channel gate driver with 4.5-A/9-A source and sink peak current respectively. They are designed for fast switching to drive power MOSFETs and SiC MOSFET power switches. The NCV51752 offers short and matched propagation delays. For improved reliability, dV/dt immunity and even fasterturn−off, the NCV51752 can utilize to generate a negative bias rail. The NCV51752 is available in a 4 mm SOIC-8 package and can support isolation voltage up to 3.75 kVRMS. The NCV51752 offers other important protection function such as independent under-voltage lockout for both-side driver.