The KA3525 SMPS Controller IC designed as a monolithic integrated circuit that consists of all control circuit necessary to implement a pulse width modulating regulator. This KA3524 device comes with a 5V voltage regulator capable of supplying a current up to 50mA to an external circuit, an error amplifier, a pulse width modulator, an oscillator, under-voltage lockout, soft start circuit, and output drivers in the chip. Both the regulator output transistor and each output switch of the device internally current limiting. And to limit junction temperature, an internal thermal shutdown circuit employed.
This Complete PWM power control circuit allows their operation beyond 430KHz with frequency stability with temperature. Meanwhile, it offers a power dissipation of 1000mW. This SMPS control circuit provides Single-ended or push-pull outputs along with the current limit amplifier provides external component protection. In addition to it, the On-chip protection provided against excessive junction temperature and output current. Thus provides a 5V, 50mA linear regulator output to user.
The oscillator in KA3525 uses an external resistor (RT) to establish a constant charging current into an external capacitor (CT). While this uses more current than a series connected PC, it provides a linear ramp voltage on the capacitor. This is also used as a reference for the comparator.
- Low power supply systems
- LED drivers
- Remote Microcontroller designs
- SMPS circuits
- Auxiliary power Supply