Schematic Archives - DataSheetCafe.com

This product integrates advanced trench MOSFET technology and Schottky diodes to maximize power efficiency and switching speed, and can be widely used in applications requiring high-efficiency power management.

Part Number: AO4712, A04712

Function: N-Channel Enhancement Mode Field Effect Transistor

Package: SO-8 Pin type

Manufacturer: Alpha & Omega Semiconductor

Image

AO4712 mosfet

Description

The AO4712 uses advanced trench technology with a monolithically integrated Schottky diode to provide excellent RDS(ON),and low gate charge. This device is suitable for use as a low side FET in SMPS, load switching and general purpose applications. Standard Product AO4712 is Pb-free
(meets ROHS & Sony 259 specifications).

Features

The main feature is the monolithic integration of the Schottky diode. Compared to general diodes, the Schottky diode, which provides fast current transfer characteristics and low voltage drop, is effective in reducing the loss of reverse current during switching. This enables efficient switching and reduces switching loss, making it suitable for high-speed switching circuits.

1. VDS (V) = 30V

2. ID =11.2A (VGS = 10V)

3. RDS(ON) < 14.5mΩ (VGS = 10V)

4. RDS(ON) < 18mΩ (VGS = 4.5V)

Pinouts

AO4712 pinout

Absolute maximum ratings ( Ta=25°C )

1. Drain to source voltage: VDSS = 30 V

2. Gate to source voltage: VGSS = ± 12 V

3. Drain current: ID = 11.2 A

4. Total Power Dissipation: Pd = 3.1 W

5. Avalanche energy: Ear = 38 mJ

6. Channel temperature: Tch = 150 °C

7. Storage temperature: Tstg = -55 to +150 °C

A Soft Recovery MOSFET (SRFET)

A Soft Recovery MOSFET (SRFET) is a type of power MOSFET that features an integrated Schottky diode designed to minimize switching losses and improve efficiency in power conversion applications.

1. Integrated Schottky Diode:

Unlike standard MOSFETs, SRFETs have a built-in Schottky diode, which is a fast-switching diode known for its low forward voltage drop and quick recovery time. The integration of this diode helps reduce reverse recovery losses when the MOSFET switches between conducting and non-conducting states. This is particularly beneficial in circuits where rapid switching is required, such as in DC-DC converters and synchronous rectifiers. Schottky diodes are known for having a low forward voltage drop (typically 0.15V to 0.45V), which minimizes power loss and heat generation, enhancing the overall efficiency of the circuit.

2. Soft Recovery:

The term “soft recovery” refers to the smooth transition of the diode from its conducting state to its non-conducting state when the MOSFET switches off. Traditional diodes can cause abrupt changes that lead to high-voltage spikes and electromagnetic interference (EMI). In SRFETs, the soft recovery characteristic helps reduce these spikes, thereby minimizing EMI and noise, which is critical for sensitive electronic applications. This feature ensures a smoother current transition during the reverse recovery process, preventing sharp current spikes and providing a cleaner signal.

AO4712 Datasheet PDF

General-Purpose Operational Amplifier

This is an LED driver chip manufactured by PowTech. It is designed to provide efficient power conversion and stable performance for driving LEDs, especially for applications requiring high efficiency and precision control.

Part Number: PT4515

Function: Single-stage linear LED driver chip

Package: TO252-2L, SOT89-3L Type

Manufacturer: PowTech

Image

PT4515 LED Driver

Description

PT4515 is a high-precision linear LED driver chip with a single-stage architecture and no EMI problems. The system does not require magnetic components such as inductors or transformers, and the entire system structure is simple and low-cost.

This LED Driver Chip uses patented current control and compensation technology. The current accuracy can be controlled within ±3%, which can be set by external resistors, and the peak current is 60mA. Multiple chips can be used in parallel to increase current output capacity. PT-4515 has built-in over-temperature and high-voltage automatic current reduction function, and over-temperature protection function.

PT4515 has a high-voltage current drop function. When the voltage of the chip OUT pin is too high (>70V), the output current will be gradually reduced to keep the output power at an approximately constant value to improve the stability of the system. When the high-voltage current drop is in effect, the output current is reduced to a maximum of one-third of the set output current. The system will continuously detect the OUT pin voltage. When the OUT pin voltage drops below 70V, the system current returns to normal.