TL494 Pulsewidth Mod Controller CCT
ROHS
Z2894
$2.15 per ea |
|
|---|---|
| Quantity | Price |
| ea | $2.15 |
| 10+ | $1.90 |
| 25+ | $1.65 |
| per ea | |
| Packaging | |
| All prices shown are (inc. GST) | |
Overview
TL494 Pulsewidth Modulation Controller
The TL494 possesses all of the functions required to construct a pulse-width-modulation (PWM) control
circuit on a single chip. Designed from the outset for power-supply control, this chip 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 display a common-mode voltage range from –0.3 V to VCC – 2 V. The dead-time control
comparator has a fixed offset that gives 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 allow for either common-emitter or emitter-follower output capability. The
TL494 provides for push-pull or single-ended output operation, which can be chosen through the output-control
function. The architecture of this device alleviates the possibility of either output being pulsed twice during
push-pull operation.
The TL494 possesses all of the functions required to construct a pulse-width-modulation (PWM) control
circuit on a single chip. Designed from the outset for power-supply control, this chip 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 display a common-mode voltage range from –0.3 V to VCC – 2 V. The dead-time control
comparator has a fixed offset that gives 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 allow for either common-emitter or emitter-follower output capability. The
TL494 provides for push-pull or single-ended output operation, which can be chosen through the output-control
function. The architecture of this device alleviates the possibility of either output being pulsed twice during
push-pull operation.
Features
- 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
Information & Downloads
- Altronics Code: Z2894
- I/N: 6434
- Barcode: 9321758085288
- Shipping Weight: 0.00205Kg
- Packaging Sizes
- EACH: 1
- TUBE: 25
- RoHS: Approved
- Large Image 1
Warranty & Returns
12 MONTHS
We offer 12 months warranty on this product from its date of purchase. This is available from Altronics stores, online purchases or Altronics resellers. In accordance with our full warranty terms we will repair, replace or refund if goods you have purchased from us are defective.
30 DAY MONEY BACK GUARANTEE
Not withstanding our warranty policy, if you are dissatisfied with our goods or service you may return the goods within 30 days of our despatch date. Simply contact us for a return authorisation number and we will refund your purchase in full, less transport costs on receipt of goods. All returned goods must be in as sold condition including all packaging, instructions, invoices etc.