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Technical Specifications
Parameters and characteristics for this part
| Specification | TL494CNSR |
|---|---|
| Clock Sync | False |
| Control Features | Frequency Control, Dead Time Control |
| Duty Cycle (Max) [Max] | 45 % |
| Frequency - Switching [Max] | 300 kHz |
| Frequency - Switching [Min] | 1 kHz |
| Function | Step-Up, Step-Up/Step-Down, Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 2 |
| Operating Temperature [Max] | 70 °C |
| Operating Temperature [Min] | 0 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 0.209 " |
| Package / Case | 16-SOIC |
| Package / Case | 5.3 mm |
| Supplier Device Package | 16-SO |
| Synchronous Rectifier | False |
| Topology | Forward Converter, Flyback, Push-Pull, Half-Bridge, Full-Bridge, Boost, Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 40 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 7 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 0.51 | |
| 10 | $ 0.44 | |||
| 25 | $ 0.41 | |||
| 100 | $ 0.33 | |||
| 250 | $ 0.30 | |||
| 500 | $ 0.26 | |||
| 1000 | $ 0.20 | |||
| Digi-Reel® | 1 | $ 0.51 | ||
| 10 | $ 0.44 | |||
| 25 | $ 0.41 | |||
| 100 | $ 0.33 | |||
| 250 | $ 0.30 | |||
| 500 | $ 0.26 | |||
| 1000 | $ 0.20 | |||
| Tape & Reel (TR) | 2000 | $ 0.18 | ||
| 6000 | $ 0.17 | |||
| 10000 | $ 0.16 | |||
| 50000 | $ 0.15 | |||
| Texas Instruments | LARGE T&R | 1 | $ 0.33 | |
| 100 | $ 0.23 | |||
| 250 | $ 0.17 | |||
| 1000 | $ 0.12 | |||
Description
General part information
TL494 Series
The TL494 device 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 device 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.
Documents
Technical documentation and resources
