電源ic tl494cn全新原裝,歡迎前來(lái)詢價(jià)

 

tl494cn

脈沖寬度調(diào)制 (pwm) 控制電路

全新原裝,現(xiàn)貨,歡迎訂購(gòu)!

產(chǎn)品信息

特性

• complete pwm power-control circuitry
• uncommitted outputs for 200-ma sink or source current
• output control selects single-ended or push-pull operation
• internal circuitry prohibits double pulse at either output
• variable dead time provides control over total range
• internal regulator provides a stable 5-v reference supply with 5% tolerance
• circuit architecture allows easy synchronization

說(shuō)明

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 v_cc–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.