ABLIC offers a wide variety of product lines including a soft start circuit, a inrush current limit circuit, discharge shunt function, output voltage external setting, output capacitor-less, a supply voltage divided output to meet customers needs.
The model of the control IC supports soft start for low output voltage. However, other protection features such as overvoltage and peak current protection are not implemented.
RP401 includes a soft start circuit. By simply using an inductor, a capacitor,(resisters for adjustable type), and a diode as external components, a high-efficiency step-up DC/DC converter can be easily configured.
RP400 includes a soft start circuit. By simply using an inductor, a capacitor, a diode, and(resistors) as external components, a high-efficiency step-up DC/DC converter can be easily configured.
Undervoltage lockout, soft-start, switching frequency, maximum duty cycle, and overcurrent protection limit are all adjustable using a minimum number of external components.
Soft-start can be implemented using the shutdown pin with an external RC circuit allowing the user to tailor the soft-start time to a specific application.
Using the PMBus standard, the TPS40428 device can program reference voltage, fault limit, UVLO threshold, soft-start time and turn-on and turn-off delay.
The MAX1522/MAX1524 have a latched fault mode, which shuts down the controller when a short-circuit event occurs, whereas the MAX1523 reenters soft-start mode during output fault conditions.
A and C versions with adjustable oscillator maximum duty cycle, phase compensation, and soft start time with an external capacitor and resistor, and B version with adjustable soft start time with an external capacitor and with CE pin.
Additional features include a power-on reset output with a capacitor-adjustable timeout period, programmable soft-start, output tracking, output overload, short-circuit and thermal shutdown protections.
A microcomputer is equipped to enable a soft-start and B power delay after heater power soft start- like what a rectifier tube does. Very vacuum tube-friendly sequence.
In order to protect the IC against in-rush current at start-up, the soft start function is provided. The soft start time can be set by connecting external capacitors.
The real low voltage brushless DC inverter control technology, using the most advanced six sensorless intelligent three drivers, by adjusting the duty cycle(PWM) to change the pump speed and power, soft start, safe and reliable Long life, Low noise.
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