STMicroelectronics Manuals

This application note describes how to implement a high power factor offline LED driver module using devices from the VIPer family in flyback configuration and with a TSM1052 as a constant current controller. This design avoids using high voltage electrolytic capacitors and evaluates the influence of the output bulk electrolytic capacitor on overall performance. Finally, a non-electrolytic configuration is implemented.

This application note presents a solution for designing a 400W fixed-off-time controlled PFC preregulator using the L6563S and L6563H. The solution utilizes peak current-mode control with fixed-off-time, combining the simplicity and affordability of TM operation with the high-current capability of FF-CCM operation.

This is an application note about L6563H 250 W TM PFC demonstration board, which introduces the main features and circuit description of the product.

The LNBH23L is an integrated solution for supplying/interfacing satellite LNB modules. It gives good performance in a simple and cheap way, with minimum external components necessary. It includes all functions needed for LNB supplying and interfacing, in accordance with international standards. Moreover, it includes an I²C bus interface and, thanks to a fully integrated step-up DC-DC converter, it functions with a single input voltage supply ranging from 8 V to 15 V.

This application note introduces a third approach to the operation of PFC pre-regulators: a solution that couples the simplicity and affordability of TM operation with the high-current capability of FF-CCM operation.

This application note introduces anon isolated, soft-switched, single-stage high power factor offline LED driver from onsemi.

This application note describes the demonstration board of the all primary-sensing switching regulator ALTAIR05T-800 and presents the results of its bench evaluation. The board implements a 5 W (5 V / 1 A) wide range mains battery charger with constant voltage/constant current. The ALTAIR05T-800 combines a high-performance low-voltage PWM controller chip and an 800 V, avalanche rugged power MOSFET in the same package. The PWM chip is a quasi-resonant (QR) current mode controller IC specifically designed for QR ZVS (zero-voltage switching at switch turn-on) flyback converters. The device is capable of providing constant output voltage (CV) and constant output current (CC) regulation using primary sensing feedback. This eliminates the need for the optocoupler, the secondary voltage reference, as well as the current sensor, while maintaining very accurate regulation. Additionally, it is possible to compensate the voltage drop of the output cable, so as to improve CV regulation on the externally accessible terminals. Extremely low consumption under no-load conditions is ensured thanks to a controlled burst mode operation that, along with the built-in high-voltage startup circuit and the low operating current of the device, helps minimize residual input consumption. Although an auxiliary winding is required in the transformer to correct

This document describes the method of using the STC3100 battery monitor to implement gas gauge applications. The STC3100 is a new device that includes battery monitoring features (voltage, current, and temperature) and a Coulomb counter to implement a gas gauge system in existing or future applications.

This application note describes a demonstration board based on the transition-mode PFC controller L6563H and presents the results of its bench demonstration. The board implements a 100 W, wide-range mains input, PFC pre-conditioner suitable for ballast, adapters, flatscreen displays, and all SMPS having to meet the IEC61000-3-2 or the JEITA- MITI regulation. The L6563H is a current-mode PFC controller operating in transition mode (TM) and implementing an internal high-voltage startup circuitry.

This application note introduces the characteristics and applications of the STBP120 overvoltage protection device

This document describes a wide input voltage range single output power supply, and details its features and characteristics in applications such as LCD or plasma TVs, desktop computers, etc.

This application note describes how to use the STOD2540 DC-DC converter to generate two output voltages using a single inductor and an external charge pump. The STOD2540 is a highly integrated boost converter that can provide an adjustable output up to 35 V from a 3.0 to 5.5 V input voltage. The converter operates in PFM mode and is ideal for generating the necessary voltages to supply TFT LCDs, OLEDs, and E-paper shelf labels. Its low operating supply current makes it ideal for small, portable, battery-powered applications.

This application note describes a demonstration board based on the transition-mode PFC controller L6563S and presents the results of its bench evaluation. The board implements a 400 W, wide-range mains input, PFC pre-conditioner suitable for ATX PSU, flat screen displays, etc. The chip is operated with fixed off time control in order to use a low-cost device like the L6563S, which is usually prohibitive at this power level. Fixed-off-time control allows continuous conduction mode operation, which is normally achieved with more expensive control chips and more complex control architectures.