Semiconductors for Power Supplies
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Semiconductors for Power Supplies STORAGE PRODUCTS

Types and Applications of Switching Power Supplies Types of DC-DC converters embedded in various power supplies Full-Bridge 1 Step-up chopper Servers EWS Medical equipment High-capacity power supplies Power supplies for base stations 2 Step-down chopper 3 Charge pump (Synchronous rectification) Half-Bridge Power supplies for FPD TVs Power supplies for desktop PCs Uninterruptible power supply (UPS) systems On-board DC-DC converters Forward Notebook PC adaptors Information and communications equipment Desktop PCs Power supplies for game consoles Multifunction printers Industrial power...

Packaging trend for power devices Large chip housing space Body size: 15 x 10 mm2 (excl. lead length) Body size: 26 x 20 mm2 (excl. lead length) Enhanced thermal performance TO-220 (Non-Isolated) Body size: 15.1 x 10.2 mm2 (excl. lead length) Thin and large chip housing space Thickness: 2 .3 mm Body size: 7.2 x 6.6 mm2 Thickness: 0.85 mm Body size: 8 x 8 mm2 TSON Advance Thickness: 0.95 mm Body size: 6 x 5.3 mm2 Thickness: 0.85 mm Body size: 3.3 x 3.3 mm2 Packaging trend for photocouplers To address the needs for power supply units requiring small, thin form factor, Toshiba is developing...

Switching Power Supplies AC-DC Flyback Power Supplies Features AC-DC flyback power supplies have a very simple circuit configuration that consists of a minimal part count. They are suitable for low-power power supplies. Application Examples Notebook PC adaptors Power supplies PC peripherals LCD adaptors Chargers for portable products Standby power supplies and small adaptors Circuit Example PFC Control Switch Main Switch Secondary Rectification High-Voltage Power MOSFETs: DTMOS Series -MOSVII Series High-Voltage Power MOSFETs: DTMOS Series -MOS Series/Bipolar Power Transistor Synchronous...

AC-DC Forward Power Supplies Features AC-DC forward power supplies with a relatively simple circuit configuration are widely used for 100-W to 500-W power supply applications. Forward power supplies have less ripple since the capacitor is continuously charged. Compared to flyback power supplies, they exhibit a higher transformer efficiency and thus can provide up to 500 W. Application Examples Notebook PC adaptors Desktop PCs Power supplies for game consoles Information and communications equipment Multifunction printers Industrial power supplies Circuit Example Main Switch Blocking Diode...

Switching Power Supplies AC-DC Half-Bridge Power Supplies Features Resonant half-bridge power supplies are suitable for relatively high-power power supply applications in the range of 150 W to 1 kW. The two transistors connected in series with the input supply voltage reduce the input voltage applied to the primary side of the transformer by half. This makes it possible to use Low-Voltage transistors. Application Examples Power supplies for FPD TVs Desktop PCs Servers Uninterruptible power supplies (UPS) Circuit Example Blocking Diode SiC Schottky Barrier Diode Secondary Rectification...

AC-DC Full-Bridge Power Supplies Features Full-bridge circuits are more complex than half-bridge circuits. However, since full-bridge power supplies provide higher efficiency, they are mainly used for large-capacity applications (with over 1-kW capacity). Because full-bridge power supplies evenly energize transformers bidirectionally, they do not cause magnetization in transformers. Thus, full-bridge power supplies do not need a demagnetization circuit. While the frequency and current ranges of a half-bridge power supply are limited by the capacitor used, full-bridge power supplies are free...

Switching Power Supplies DC-DC Converters (Non-Isolated) Features Circuit Example A DC-DC converter is an electronic circuit which converts a direct current from one voltage level to another. While non-isolated DC-DC converters are primarily used for applications requiring less than 30 W, up to 100 W can be handled by adding a single MOSFET. Many DC-DC converters are deployed in cell phones and mobile devices that are becoming smaller, lighter and more feature-rich. High-Side MOSFET Application Examples Control Circuit POL modules On-board DC-DC converters CPU and memory power supplies Cell...

DC-DC Converters (Isolated) Features Isolated DC-DC converters are widely used for applications in which there is a large difference between input and output voltages. Isolated half-bridge and full-bridge converters can handle up to 1 kW or so. Isolated DC-DC converters are used in power supplies for cell sites where direct-current distribution is utilized. They are used for both step-down and step-up voltage conversion. DC-DC Conversion DC-DC Conversion (Secondary-Side Switch) U-MOSVIII-H Series (Primary-Side Switch) U-MOSVIII-H Series Application Examples Control Circuit DC-DC converters...

Linear power supplies are available in a wide range of packages from general-purpose SMV (SOT-25) to an ultra-small package with the industry's smallest form factor measuring 0.8 x 0.8 mm. Those in the DFN4, SDFN4 and WCSP4 packages, which are most widely used for small portable applications, are offered with various current/voltage ratings and additional features. Additionally, the new LDO regulator series provides a significant reduction in voltage dropout thanks to reduced process geometries. • Application Examples • Small portable devices (Cell phones, Portable audio, Notebook PCs,...

Load switch ICs control the supply of electric power to the downstream system loads. Their intended use is to shut off power supplies as their loads enter standby mode. Load switch ICs are power supply ICs fabricated using a CMOS process and contain an output transistor and an output driver. They provide a solution footprint much smaller than load switches composed of discrete components. Moreover, load switch ICs feature low-voltage operation, low on-resistance and low current consumption, and provide additional functions. • Application Examples • Small portable devices (Cell phones,...