SI-8511NVS-TL Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Output Type:	Transistor Driver
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Number of Outputs:	1
Output Phases:	1
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 5.5 V
Frequency - Switching:	400kHz
Duty Cycle (Max):	--
Synchronous Rectifier:	Yes
Clock Sync:	No
Serial Interfaces:	--
Control Features:	Current Limit, Enable, Power Good, Soft Start
Operating Temperature:	-20°C ~ 85°C (TA)
Package / Case:	24-TSSOP (0.220", 5.60mm Width)
Supplier Device Package:	24-TSSOP

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Introduction

The SI-8511NVS-TL is a DC-DC switching controller designed for high power applications. This power module is designed to have a variety of protection features, including overvoltage protection, current limit protection, thermal protection and ground fault protection. The SI-8511NVS-TL is capable of controlling and regulating the output voltage of the system in order to provide an optimal performance regardless of the load condition. It is available in a variety of regulator configurations and is capable of regulating both buck (step-down) and boost (step-up) DC-DC converters.

Applications

The SI-8511NVS-TL can be found in many different electronics applications. It is ideal for use in devices that require a high degree of control and regulation of the output voltage. This could include automotive electronics, lighting fixtures, industrial control systems, medical devices and computer peripherals. With its wide range of protection features, it is highly reliable in even the most difficult and challenging environments.

Working Principle

The SI-8511NVS-TL is a DC-DC switching controller that operates on a pulse width modulation (PWM) principle. It consists of two main components: an internal power-on reset (POR) circuit and an internal voltage regulator. The POR circuit is used for power-on reset of the device and the voltage regulator is used to regulate the output voltage. The device’s PWM controller is capable of operating in discontinuous conduction mode (DCM) and frequency modulation (FM) mode. In DCM mode, the switching frequency is determined by the output load of the device. The device is also capable of operating in FM mode, which is used for dynamic response control of the output voltage. In this mode, the switching frequency is kept fixed, while the duty cycle is modified as necessary to regulate the output voltage. The internal voltage regulator monitors the output voltage through an external sense resistor and an internal voltage divider network. The voltage regulator adjusts the duty cycle of the PWM controller accordingly. If the output voltage exceeds the programmed limits, the voltage regulator will shut down the device power switch and reduce the duty cycle of the PWM controller until the output voltage returns to the programmed limits. This will ensure that the output voltage is maintained within the specified tolerance range.In addition to voltage-regulation capabilities, the SI-8511NVS-TL also offers a variety of protection features to ensure its safe operation. These include under-voltage protection, over voltage protection, current limit protection and thermal protection. These features make the SI-8511NVS-TL an ideal choice for challenging and demanding applications.

Conclusion

The SI-8511NVS-TL is a DC-DC switching controller designed for a variety of applications. It operates on a PWM principle and is capable of controlling and regulating the output voltage. It is capable of operating in both DCM and FM mode, with a variety of protection features to ensure its safe operation. This makes it ideal for use in automotive electronics, lighting fixtures, industrial control systems, medical devices and computer peripherals.

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