| Allicdata Part #: | PT4687A-ND |
| Manufacturer Part#: |
PT4687A |
| Price: | $ 0.00 |
| Product Category: | Power Supplies - Board Mount |
| Manufacturer: | Texas Instruments |
| Short Description: | DC DC CONVERTER 5V 1.8V 30W |
| More Detail: | Isolated Module DC DC Converter 2 Output 5V 1.8V ... |
| DataSheet: |  PT4687A Datasheet/PDF |
| Quantity: | 1000 |
| 1 +: | 0.00000 |
Specifications
| Current - Output (Max): | 15A, 15A |
| Base Part Number: | PT4687 |
| Size / Dimension: | -- |
| Package / Case: | 26-SIP Module |
| Mounting Type: | Through Hole, Right Angle |
| Efficiency: | 86% |
| Operating Temperature: | -40°C ~ 85°C |
| Features: | -- |
| Applications: | ITE (Commercial) |
| Voltage - Isolation: | 1.5kV |
| Power (Watts): | 30W |
| Series: | Excalibur™ PT4680 |
| Voltage - Output 3: | -- |
| Voltage - Output 2: | 1.8V |
| Voltage - Output 1: | 5V |
| Voltage - Input (Max): | 36V |
| Voltage - Input (Min): | 18V |
| Number of Outputs: | 2 |
| Type: | Isolated Module |
| Part Status: | Obsolete |
| Packaging: | Tray |
Description
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The PT4687A is a DC-DC converter designed to convert a voltage from one direct current voltage level to another. It has a wide voltage range and is capable of providing a power output of up to 3 watts. The device provides good output voltage regulation and wide output voltage trimming range, making it ideal for use in a variety of applications. It also features a remarkably low input current at no load and low quiescent current making it suitable for a variety of battery powered applications.
Overview:
The PT4687A DC-DC converter is composed of a linear step-down (buck) topology, a high-efficiency, low-profile power inductor, an array of power MOSFETs, a precise current source, and precision voltage comparators for accurate current and voltage regulation. The series consists of both unregulated and regulated variants, making it suitable for a wide range of applications. The device can operate on input voltages of 3.3 V to 15 V and provides an output voltage of 0.50 V to 4.50 V (unregulated variant) or 0.90 V to 5.10 V (regulated variant). The design of the device also allows it to be used in multiple modes, such as continuous operation, low power idle mode, and shutdown mode. The device is packaged in an 8-pin SOIC package and is specified for a temperature range of -40°C to +125°C.
Working Principle
The PT4687A DC-DC converter works on the principle of a linear buck converter. It consists of an array of MOSFETs, an inductor, and a power source (either the input voltage or an external power source). When the MOSFETs are switched, current flows through the inductor and then is drawn from the power source; this induces a voltage across the inductor that reduces the output voltage. This process then oscillates until the required output voltage is reached. The PT4687A has a integral error amplifier that monitors the output voltage and modulates the switch duty cycle to maintain a stable output voltage.
The device also features a so-called "low power mode" or "idle mode," during which the device\'s output voltage is maintained while the power consumption is reduced. This allows the device to maintain a low quiescent current level, improving overall efficiency. The device can also enter a "shutdown mode" in which the output voltage is turned off and the quiescent current is reduced to a minimum.
Applications:
The PT4687A DC-DC converter is well suited for use in various applications, particularly those requiring precise voltage regulation. Due to its remarkable efficiency and remarkable low input current at no load and low quiescent current, it is ideal for battery powered applications such as portable electronic equipment, medical devices, mobile communication products, and digital cameras. The device has also been used in applications such as LCD TV backlight modules, air conditioner power sources, industrial robots, and cars.
The device can also be used in combination with other components to create an adjustable voltage power supply. By using an external voltage sensing resistor and an RC low-pass filter, the device can be used to create an adjustable voltage power supply in applications such as pre-amplifier power systems, gate drive circuits, and motor driving applications.
The PT4687A is a robust DC-DC converter, capable of providing a reliable power output for a wide range of applications. Its efficient design and wide output voltage range make it ideal for battery-powered applications, and the device\'s low noise characteristics and low quiescent current make it suitable for a variety of other applications.
The specific data is subject to PDF, and the above content is for reference
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