Overview
The UC3525AN is a pulse width modulator (PWM) integrated circuit designed by Texas Instruments. It is part of the UC1525A/1527A series, which offers improved performance and reduced external component count for designing various types of switching power supplies. The device features an on-chip 5.1-V reference voltage, adjustable dead-time control, internal soft-start circuitry, and pulse-by-pulse shutdown capabilities, making it versatile for a range of power supply applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 8 to 35 | V |
| Reference Voltage | 5.1 ± 1% | V |
| Oscillator Frequency Range | 100 Hz to 500 kHz | |
| Output Current (Source/Sink) | Up to 500 mA | |
| Package Type | PDIP (16 pins) | |
| Operating Temperature Range | 0 to 70 | °C |
| Storage Temperature Range | -65 to 150 | °C |
Key Features
- 8-V to 35-V operation
- 5.1-V reference voltage trimmed to 1%
- 100-Hz to 500-kHz oscillator range
- Separate oscillator sync terminal
- Adjustable dead-time control
- Internal soft-start circuitry
- Pulse-by-pulse shutdown
- Input undervoltage lockout with hysteresis
- Latching PWM to prevent multiple pulses
- Dual source and sink output drivers
Applications
- Off-line and DC/DC power supplies
- Converters using voltage mode
- Single-ended or two-switch topology designs
- Solar inverters
- Welding inverters
- Motor control
- Battery chargers
Q & A
- What is the operating voltage range of the UC3525AN?
The UC3525AN operates within a voltage range of 8 to 35 volts. - What is the reference voltage of the UC3525AN?
The reference voltage is 5.1 volts, trimmed to 1% accuracy. - What is the oscillator frequency range of the UC3525AN?
The oscillator frequency range is from 100 Hz to 500 kHz. - What type of output drivers does the UC3525AN have?
The UC3525AN features dual source and sink output drivers. - Does the UC3525AN have internal soft-start circuitry?
Yes, the UC3525AN includes internal soft-start circuitry. - What is the purpose of the oscillator sync terminal?
The oscillator sync terminal allows multiple units to be slaved or synchronized to an external system clock. - How is dead-time adjusted in the UC3525AN?
Dead-time is adjusted using a single resistor between the CT and discharge terminals. - What are some common applications of the UC3525AN?
Common applications include off-line and DC/DC power supplies, solar inverters, welding inverters, motor control, and battery chargers. - What is the operating temperature range of the UC3525AN?
The operating temperature range is from 0 to 70°C. - What is the storage temperature range of the UC3525AN?
The storage temperature range is from -65 to 150°C.
