ICS83840BHLF

Series:	*
Packaging:	Tray
Part Status:	Obsolete
Type:	DDR SDRAM Multiplexer
Applications:	--
Mounting Type:	Surface Mount
Package / Case:	64-TFBGA
Supplier Device Package:	64-TFBGA (7x7)
Base Part Number:	ICS83840

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Specialized ICs

The ICS83840BHLF is a specialized digital-input PWM buck controller designed for frequency-converting power-supply applications. The device is ideally suited for supplying power to processors in digital products such as audio and video equipment. When used in combination with a suitable power transistor and inductor, this device is capable of providing output voltages as low as 0.80V and current as high as 15A from an input voltage of 4.5V to 28V.

Application Field
The ICS83840BHLF is widely used in applications such as servers, servers with platforms, laptop PCs, LCD and plasma displays, set-top-box power supplies and DC/DC converters. One of the biggest advantages of the ICS83840BHLF is its efficiency, which is higher than 90%. It is also highly robust, with a wide operating temperature range from -40 to 105 degrees Celsius. The device is also able to minimize EMI (Electromagnetic Interference) and is able to operate at frequencies up to 400 kHz, allowing it to achieve high degree of switching speed. The ICS83840BHLF also provides a range of different output voltage options, with voltage monitoring and auto-selectable power-good outputs. This makes the device ideal for use in end products and system applications.

Working Principle
The ICS83840BHLF works by converting a digital input such as an oscillator or an external signal into a pulse width modulated (PWM) output. The PWM output is used to control a power transistor, usually a MOSFET, in order to step-down the input voltage to a lower voltage level which can be used by the system or end product. The ICS83840BHLF is designed to provide an adjustable output voltage with a duty cycle range between 5% and 95%. By controlling the duty cycle, the switching frequency and the output current can be adjusted to match the requirements of the application.

The ICS83840BHLF works by receiving a digital input signal and then converting this into an analog signal which is then used to control a power MOSFET. As the duty cycle of the PWM output changes, so too does the voltage across the power MOSFET, which ultimately ensures that the output voltage is always regulated to the desired level. The ICS83840BHLF also includes features such as PWM fan-speed control and voltage margining options in order to provide improved system performance and customer satisfaction.

In addition to the PWM output, the ICS83840BHLF also includes multiple protection features. This allows the device to detect and protect against over-current, over-voltage, under-voltage, over-temperature and open-load conditions. This ensures that the end product is not damaged by any adverse conditions and can operate reliably over its operating temperature range.

The ICS83840BHLF is a versatile and reliable digital input PWM buck controller designed to provide a wide range of output voltages and current levels from a single input voltage. Its efficient operation and multiple protection features make it ideal for use in a wide range of frequency-converting power-supply applications in end products and system applications.

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