Overview
The TL598CD, produced by Texas Instruments, is a pulse-width-modulation (PWM) control circuit designed primarily for power-supply control applications. This integrated circuit incorporates all the necessary functions for constructing PWM controlled systems on a single chip, providing flexibility for systems engineers to tailor power-supply control circuits to specific applications.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Package Type | SOIC (D) 16-pin | Small Outline Integrated Circuit package |
| Operating Temperature | 0°C to 70°C | Range of temperatures in which the device can operate |
| Output Current (each output) | 250 mA (sink or source) | Maximum current each output can handle |
| Internal Oscillator Frequency | Externally adjustable | Frequency of the internal oscillator, adjustable via external components |
| Reference Voltage | 5 V, trimmed to 1% tolerance | Stable reference voltage provided by the internal regulator |
| Undervoltage Lockout | For low VCC conditions | Protection mechanism to prevent operation under low voltage conditions |
| Output Control | Selects parallel or push-pull operation | Function to select the mode of output operation |
| Dead-Time Control | Variable dead-time control | Control over the dead-time period to prevent output overlap |
Key Features
- Complete PWM Power-Control Function: Includes all necessary functions for PWM control on a single chip.
- Totem-Pole Outputs: Provides 200-mA sink or source current with exceptional rise and fall times for power FET control.
- Output Control: Selects either parallel or push-pull operation, with circuit architecture preventing double pulsing during push-pull operation.
- Internal Regulator: Offers a stable 5-V reference supply with 1% tolerance.
- Output Current-Limiting Protection: Built-in protection to limit output 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 TL598CD is primarily designed for power-supply control applications, including but not limited to:
- Switch-mode power supplies
- DC-DC converters
- Motor control systems
- Other applications requiring PWM control
Q & A
- What is the primary function of the TL598CD?
The TL598CD is a pulse-width-modulation (PWM) control circuit designed primarily for power-supply control applications.
- What types of output operations can the TL598CD perform?
The TL598CD can select either parallel or push-pull operation.
- What is the maximum output current of the TL598CD?
The maximum output current is 250 mA for each output, capable of sinking or sourcing.
- Does the TL598CD have built-in protection mechanisms?
Yes, it includes output current-limiting protection and undervoltage lockout for low VCC conditions.
- How is the internal oscillator frequency adjusted?
The internal oscillator frequency is externally adjustable via RT and CT components.
- What is the reference voltage provided by the TL598CD?
The TL598CD provides a stable 5-V reference supply with 1% tolerance.
- Why are separate power and signal grounds important in the TL598CD?
Separate grounds help reduce errors caused by high current-induced voltage drops and common-mode noise.
- What is the operating temperature range of the TL598CD?
The operating temperature range is from 0°C to 70°C.
- What package types are available for the TL598CD?
The TL598CD is available in SOIC (D) 16-pin packages.
- Can the TL598CD be used in synchronous multiple supply operations?
Yes, by connecting RT to the reference output and providing a sawtooth input to CT.
