Overview
The UC1524AJ, produced by Texas Instruments (though also available under the Unitrode brand), is an advanced voltage mode PWM (Pulse Width Modulator) controller. This IC is designed to offer significant improvements over the standard UC1524 family while maintaining pin compatibility. It features a highly versatile architecture, making it suitable for a wide range of power supply applications. The UC1524AJ includes a precise 5V reference, an error amplifier, a current sense amplifier, and uncommitted transistor switches, enhancing its output versatility and simplifying power supply design.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 16-pin CDIP (J) |
| Operating Temperature Range | -55°C to 125°C |
| Supply Voltage (Vcc/Vdd) | 8V to 40V |
| Switching Frequency | Up to 300kHz |
| Duty Cycle (Max) | 45% |
| Output Current Capability | Up to 200mA |
| Output Voltage Capability | Up to 60V |
| Start-Up Supply Current | Less than 4mA |
| Shutdown Time | 200ns through PWM Latch |
Key Features
- Fully interchangeable with the standard UC1524 family.
- Precision 5V reference internally trimmed to ±1% accuracy.
- High-performance current limit function.
- Under-voltage lockout with hysteresis for jitter-free activation.
- Wide common-mode input range for both error and current limit amplifiers.
- PWM latch to ensure single pulse per period.
- Double pulse suppression logic.
- 200ns external shutdown capability.
- Automatic thermal shutdown protection.
Applications
The UC1524AJ is suitable for various power supply applications, including:
- Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, and Push-Pull converters.
- Low power, off-line supplies.
- High-performance DC-DC converters.
- Power supplies requiring precise voltage regulation and high current handling.
Q & A
- What is the operating temperature range of the UC1524AJ?
The UC1524AJ operates from -55°C to 125°C.
- What is the maximum switching frequency of the UC1524AJ?
The maximum switching frequency is up to 300kHz.
- What is the maximum duty cycle of the UC1524AJ?
The maximum duty cycle is 45%.
- What is the output current capability of the UC1524AJ?
The output current capability is up to 200mA.
- Does the UC1524AJ have thermal shutdown protection?
Yes, it has automatic thermal shutdown protection.
- Can the UC1524AJ be used in low power, off-line supplies?
Yes, it is suitable for low power, off-line supplies due to its under-voltage lockout feature.
- What is the precision of the internal 5V reference in the UC1524AJ?
The internal 5V reference is trimmed to ±1% accuracy.
- Is the UC1524AJ pin compatible with the standard UC1524 family?
Yes, it is fully interchangeable with the standard UC1524 family.
- What is the shutdown time through the PWM latch in the UC1524AJ?
The shutdown time is 200ns through the PWM latch.
- Does the UC1524AJ have double pulse suppression logic?
Yes, it includes logic to eliminate double pulsing on a single output.
