TL494CDR Regulator Positive Output Step-Up, Step-Down, Step-Up/Step-Down DC-DC Controller IC

Description

The TL494 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 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. The

TL494 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.

Koben Electronics was founded in 1995 and is located in the Silicon Valley of China, Shenzhen. 

The mission of Koben has always been to provide quality electronics components to manufacturers worldwide. Early on we became a primary conduit for end-of-program and overstock inventory for major distributors such as Future Electronics and contract manufacturers as Flextronics. Koben has since then added sourcing of high quality components from local manufacturers in China.

Koben has always been customer driven rather than opportunity driven. Meaning- we will always choose path that is best for long term relationship with customer over short term view. It is why we have one of the highest customer retention scores of China based distributors.