Voltage Mode PWM Controller I.C.
TL494CN
$2.20
| QTY | Price |
|---|---|
| 1 | $2.20 |
| 5 | $1.50 |
Description
This Voltage Mode PWM Controller I.C. 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 device 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.
Characterized for operation from 0°C to 70°C.
Features
- Circuit architecture allows for easy synchronisation
- Uncommitted outputs for 200mA 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 5V reference supply with 5% tolerance
- Complete PWM power-control circuitry
- Applications include: desktop PCs, microwave ovens, server PSUs, solar micro-inverters, washing machines, e-bikes, smoke detectors, solar power inverters
Specifications
Output Voltage
40V
Output Current
200mA
Supply Voltage
7V - 40V
Controller IC Case Style
DIP
No. of Pins
16
Frequency
300kHz
Operating Temperature
0°C - 70°C
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