KA7500B datasheet, circuit diagram, inverter, price onsemi

KA7500B

KA7500B Pinout Equivalent

1：Overview of the KA7500B：

The KA7500B is a commonly used pulse-width modulation (PWM) controller chip, categorized under power management ICs. It features a dual inline package and includes various functional circuits such as an error amplifier, oscillator, and PWM comparator. The KA7500B precisely controls output voltage and current by adjusting pulse width to stabilize power supply output, making it widely used in switch-mode power supplies and uninterruptible power supplies (UPS).

2：KA7500B Important pin function definition:

3：Alternative model recommendation

SG3525：SG3525 is a high-performance, feature-rich, and widely applicable pulse-width modulation (PWM) controller chip. It uses a dual in-line package and integrates multiple key functional modules internally, including a high-precision reference voltage source, error amplifier, oscillator, PWM comparator, and logic control circuit.

UC3842N：Both belong to PWM control chips and can be used for the control of switching power supplies. However, UC3842 is a current-mode control chip, while KA7500B is a voltage-mode control chip. But both can achieve stable power output.

UC3843： UC3843 is a high-performance current-mode pulse width modulation (PWM) controller chip. It operates with a fixed frequency and current control method, featuring single-ended output capability that effectively drives power MOSFETs and other switching devices. The chip integrates precise oscillator, error amplifier, current sense comparator, PWM latch, and other functional modules internally.

TL494IDRG：The TL494IDRG chip integrates two error amplifiers, an adjustable oscillator, a dead time control comparator, a pulse control flip-flop, a 5V regulator with 5% accuracy, and output control circuits, etc. inside, enabling complete PWM power control.