Overview
The UC3525ADW 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 in switching power supply designs. This device operates within a voltage range of 8V to 35V and features a 5.1-V reference voltage trimmed to 1%. The UC3525ADW is packaged in a 16-pin SOIC (DW) package and is suitable for a wide range of applications, including off-line and DC/DC power supplies, solar inverters, welding inverters, motor control, and battery chargers.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage (+VIN) | 8 | - | 35 | V |
| Collector Supply Voltage (VC) | 4.5 | - | 35 | V |
| Oscillator Frequency Range | 100 Hz | - | 400 kHz | - |
| Reference Voltage | 5.0 | 5.1 | 5.2 | V |
| Output Current (Source/Sink) | - | - | 400 mA | - |
| Operating Temperature Range | 0°C | - | 70°C | - |
| Package Type | - | - | SOIC (DW) 16 pins | - |
Key Features
- 8-V to 35-V Operation
- 5.1-V Reference Trimmed to 1%
- 100-Hz to 500-kHz Oscillator Range
- Separate Oscillator Sync Terminal
- Adjustable Dead-Time Control
- Internal Soft Start
- 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 UC3525ADW?
The UC3525ADW operates within a voltage range of 8V to 35V.
- What is the reference voltage of the UC3525ADW?
The reference voltage is 5.1V, trimmed to 1%.
- What is the oscillator frequency range of the UC3525ADW?
The oscillator frequency range is from 100 Hz to 500 kHz.
- Does the UC3525ADW have adjustable dead-time control?
- What type of output drivers does the UC3525ADW have?
The UC3525ADW has dual source and sink output drivers.
- What is the package type of the UC3525ADW?
The UC3525ADW is packaged in a 16-pin SOIC (DW) package.
- What are some common applications of the UC3525ADW?
Common applications include off-line and DC/DC power supplies, solar inverters, welding inverters, motor control, and battery chargers.
- Does the UC3525ADW have an internal soft-start feature?
- How does the shutdown terminal function in the UC3525ADW?
The shutdown terminal controls both the soft-start circuitry and the output stages, providing instantaneous turn-off and soft-start recycle.
- What is the operating temperature range of the UC3525ADW?
The operating temperature range is from 0°C to 70°C.
