製品説明
The TL594 PWM Controller 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 systems engineer the flexibility to tailor the power-supply control circuitry to a specific application.
The TL594 PWM Controller contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V regulator with a precision of 1.5%, an undervoltage lockout control circuit, and output control circuitry.
The error amplifiers have a common-mode voltage range of -0.3 V to VCC-2 V. The DTC 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 be used to drive the common circuitry in synchronous multiple-rail power supplies.
The uncommitted output transistors provide either common-emitter or emitter-follower output capability. Each device provides for push-pull or single-ended output operation, with selection by means of the output-control function. The architecture of these devices prohibits the possibility of either output being pulsed twice during push-pull operation. The undervoltage lockout control circuit locks the outputs off until the internal circuitry is operational.
The TL594CD, CN, CDTB are characterized for operation from -40C to 85C.
|
特長 |
|
利点 |
| |
| |
| |
|
-
PWM Buck Controller Configuration
|
|
-
Simple to use in buck configuration
|
-
Variable Frequency Operation (up to 300 KHz)
|
|
-
Optimize system size and efficiency
|
-
Complete Pulse Width Modulation Control Circuitry
|
|
|
-
On-Chip Oscillator with Master or Slave Operation
|
|
|
|
|
|
|
-
On-Chip 5.0 V Reference, 1.5% Accuracy
|
|
|
-
Adjustable Deadtime Control
|
|
|
-
Uncommitted Output Transistors Rated to 500 mA Source or Sink
|
|
|
-
Output Control for Push-Pull or Single-Ended Operation
|
|
|
|
|
|
|
-
Pb-Free Packages are Available
|
|
|
|
アプリケーション |
|
最終製品 |
- Off-line power supply
- Buck converter
|
|
- VPA (Vehicle Power Adapter)
- LED Lighting
|