KA3525A Regulating Pulse Width Modulator 20V IC DIP-16
The KA3525A is a high-performance regulating pulse-width modulator IC designed for power conversion and control applications. It integrates all essential functions required for implementing fixed-frequency PWM control systems, including a precision voltage reference, oscillator, error amplifier, PWM comparator, soft-start circuitry, shutdown control, undervoltage lockout, and dual totem-pole output drivers. This high level of integration simplifies the design of efficient power management systems.
The device is capable of driving switching transistors, MOSFETs, and power stages directly through its complementary output drivers. Its push-pull output architecture makes it particularly suitable for half-bridge, full-bridge, push-pull, and forward converter topologies. It’s widely used in industrial equipment, power supplies, inverters, motor speed controllers, and battery-powered systems requiring precise voltage regulation and reliable PWM control.
Features
- High-Precision Voltage Reference
- Adjustable Oscillator
- Integrated Soft-Start
- Deadtime Control
- Under-Voltage Lockout
- Wide Operating Voltage
- Shutdown Protection
Specifications
| Parameter | Value |
|---|---|
| Package | 16-DIP |
| Supply Voltage (Vcc) | 40V (Max) |
| Collector Supply Voltage (Vc) | 40V (Max) |
| Output Current (Sink or Source) | 500mA (Max) |
| Reference Output Current | 50mA (Max) |
| Oscillator Charging Current | 5mA (Max) |
| Operating Temperature | 0°C to +70°C |
| Maximum Frequency | 400 kHz |
| Minimum Frequency | 60 Hz |
| Power Dissipation | 1000mW |
Pinout:
| Pin | Name |
|---|---|
| 1 | INV Input |
| 2 | NI Input |
| 3 | SYNC |
| 4 | OSC Output |
| 5 | CT |
| 6 | RT |
| 7 | Discharge |
| 8 | Soft Start |
| 9 | Compensation |
| 10 | Shutdown |
| 11 | Output A |
| 12 | Ground |
| 13 | VC |
| 14 | Output B |
| 15 | +VIN |
| 16 | VREF |
Applications
- Switch-Mode Power Supplies (SMPS)
- DC-DC Converters
- AC-DC Converters
- Inverters
- Motor Control
- LED Lighting
- Battery Chargers
- General Power Management
Package Included
- 1x KA3525A Regulating Pulse Width Modulator 20V IC DIP-16.