Overview
The TL598CN, produced by Texas Instruments, is a pulse-width-modulated (PWM) power-control IC designed primarily for power-supply control applications. This device integrates all the necessary functions for constructing PWM controlled systems on a single chip, providing systems engineers with the flexibility to tailor power-supply control circuits to specific applications.
The TL598CN includes two error amplifiers, an internal oscillator (externally adjustable), a dead-time control (DTC) comparator, a pulse-steering flip-flop, a 5-V precision reference, undervoltage lockout control, and output control circuits. It features totem-pole outputs capable of sinking or sourcing 200 mA of current, which are ideal for power FET control.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage Rise Time | 60 | 150 | - | ns |
| Output Voltage Fall Time | 35 | 75 | - | ns |
| Output Current (Sink or Source) | - | - | 200 | mA |
| Internal Reference Voltage | - | 5 | - | V |
| Reference Voltage Tolerance | - | 1% | - | - |
| Operating Temperature Range | 0 | - | 70 | °C |
| Package Type | - | - | PDIP (N), SOIC (D) | - |
Key Features
- Complete PWM Power-Control Function: Integrates all necessary functions for PWM controlled systems.
- Totem-Pole Outputs: Capable of sinking or sourcing 200 mA of current for exceptional rise and fall time performance.
- Output Control: Selects either push-pull or parallel operation.
- Internal Circuitry: Prevents double pulse at either output during push-pull operation.
- Variable Dead-Time Control: Provides control over the total range.
- Internal Regulator: Provides a stable 5-V reference supply with 1% tolerance.
- Output Current-Limiting Protection: On-board protection against excessive current.
- Undervoltage Lockout: Protects against low VCC conditions.
- Separate Power and Signal Grounds: Reduces errors caused by high current-induced voltage drops and common-mode noise.
Applications
The TL598CN is primarily designed for power-supply control applications, including:
- Switch-mode power supplies (SMPS)
- DC-DC converters
- Motor control systems
- High-frequency power supplies
- Synchronous multiple supply operations
Q & A
- What is the primary function of the TL598CN?
The TL598CN is a PWM power-control IC designed primarily for power-supply control applications.
- What types of outputs does the TL598CN have?
The TL598CN features totem-pole outputs capable of sinking or sourcing 200 mA of current.
- How can the output operation be controlled?
The TL598CN allows selection between push-pull or parallel output operation.
- What is the purpose of the internal 5-V reference supply?
The internal 5-V reference supply provides a stable voltage with 1% tolerance for various control functions.
- What protection features does the TL598CN have?
The TL598CN includes output current-limiting protection and undervoltage lockout for low VCC conditions.
- How does the TL598CN reduce common-mode noise?
The TL598CN has separate power and signal grounds to reduce errors caused by high current-induced voltage drops and common-mode noise.
- What is the operating temperature range of the TL598CN?
The operating temperature range is from 0°C to 70°C.
- What package types are available for the TL598CN?
The TL598CN is available in PDIP (N) and SOIC (D) packages.
- Can the TL598CN be used in synchronous multiple supply operations?
- What is the significance of the dead-time control (DTC) comparator?
The DTC comparator has a fixed offset that prevents overlap of the outputs during push-pull operation.
