Current - Output (Max):	5A
Base Part Number:	PT4146
Size / Dimension:	1.67" L x 1.48" W x 0.34" H (42.4mm x 37.6mm x 8.6mm)
Package / Case:	8-SMD Module, 6 Leads, Gull Wing
Mounting Type:	Surface Mount
Efficiency:	67%
Operating Temperature:	-40°C ~ 85°C
Features:	--
Applications:	ITE (Commercial)
Voltage - Isolation:	1.5kV
Power (Watts):	20W
Series:	PT4140
Voltage - Output 3:	--
Voltage - Output 2:	--
Voltage - Output 1:	1.5V
Voltage - Input (Max):	40V
Voltage - Input (Min):	18V
Number of Outputs:	1
Type:	Isolated Module
Part Status:	Obsolete
Packaging:	Tray

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DC DC Converters: PT4146C Application Field and Working Principle

DC DC converters are a wide variety of circuit components, often integrated circuits, that are used to convert from one direct current voltage to another utilizing a combination of switches, capacitors, and inductors. These electromechanical components are used to regulate the current and voltage of a direct-current (DC) electrical system, allowing the manipulation of power in DC circuits and providing a bridge between electronic and electro-mechanical systems.The PT4146C is one such component, classified as a high-power DC DC converter. This device offers a wide range of features and functions, designed to provide an alternative to more complex circuits, saving space in an electronic design while increasing flexibility.In addition to its multiple output options, the PT4146C is capable of operating at high switching frequency and has an exceptionally low quiescent current draw, making it ideal for low-power applications. Its wide input voltage range allows for the power supply to be connected directly to the DC sources, something that many competing devices cannot do. Other features of the device include an adjustable conversion frequency, adjustable turn on/off delay and output soft start up functionality, making it even more attractive to designers looking to reduce complexity and board space.The primary application of the PT4146C DC-DC converter is as a single-ended power converter for voltage conversion from a low voltage (0.6 V-5V) to a high voltage (25V-400V) range. It is suitable for applications requiring a high step-up ratio, such as LED lighting, power supplies, high voltage motor control, and automotive DC-DC converters.The PT4146C integrates a pulse width modulation (PWM) buck controller and a high-efficiency on-board power MOSFET in order to achieve high efficiency and low power dissipation. The controller automatically controls the internal switch on/off times to vary the duty cycle of the transformer, thus regulating the output voltage. The controller also supports a soft-start function, which is set using external resistors.The basic operation of the PT4146C is quite straightforward. An external power source is connected to the input terminals of the chip. When the input voltage is greater than the programmed voltage, the PWM controller takes a high signal as the reference signal. The controller then calibrates the on/off time of the internal power MOSFET in order to regulate the output voltage.In summary, the PT4146C is an ideal choice for many types of high-power applications, from high voltage DC-DC converters and LED lighting to automotive power supplies and motor control. It is suitably compact and efficient while boasting low power consumption, adjustable output voltage and high switching frequency – all within a single device.

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