UC2856DWG4

Frequency - Switching:	200kHz
Base Part Number:	UC2856
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.295", 7.50mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable, Frequency Control, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	Yes
Duty Cycle (Max):	47%
Series:	--
Voltage - Supply (Vcc/Vdd):	7 V ~ 40 V
Output Phases:	1
Number of Outputs:	2
Topology:	Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull
Output Configuration:	Positive
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

UC2856DWG4 is a PMIC device which belongs to the Voltage Regulators and DC DC Switching Controllers category. It is used to adjust the output voltage of a DC/DC converter. It contains a high side P-Channel MOSFET and a low side P-Channel MOSFET which are the switching elements in the voltage regulation and switching process. This device also has an integrated power output resistor, a pulse width modulator, and a current sense amplifer which are all essential components to ensure accurate voltage regulation. UC2856DWG4 can be used in a wide range of applications, including mobile communications devices, automobiles, industrial control and equipment, instrumentation and measurement systems, desktop computers, and more. The device is capable of regulating output voltage from 0.8V to +5V, with a maximum DC current of up to 20A. It can also operate from a wide range of input voltages (from 6.5V to 22V). This device is also equipped with various features and protections, such as input under-voltage lockout, over-voltage protection, short circuit protection, adjustable current limit, and power over-temperature protection. Additionally, it has built-in diagnostic features such as voltage and temperature monitoring and software shutdown control. UC2856DWG4 implements a pulse width modulation (PWM) control scheme to adjust the output voltage. The device takes a sensed feedback voltage derived from the output voltage and compares it to an internal voltage reference. This comparison produces an error voltage, which is amplified and drives the PWM output which is directly connected to the gate of the internal MOSFET switching devices. This PWM output serves as the control signal for the MOSFETs and as the output of the UC2856DWG4 for external switching devices. When the output voltage increases, the PWM pulse width increases and the duty cycle of the PWM output decreases. This causes the MOSFET to switch more slowly, and output voltage is regulated by reducing the duty cycle of the MOSFET. In the same way, when the output voltage decreases, the PWM duty cycle increases which causes the MOSFET to switch faster, and output voltage is regulated by increasing the duty cycle of the MOSFET. The UC2856DWG4 has a low side P-Channel MOSFET as its main switch and a high side P-Channel MOSFET as its high side driver. The low side MOSFET forms the synchronous rectifier of the DC/DC converter. It is connected directly to the output voltage and carries the output current of the converter. The high side MOSFET is connected to the switching node of the converter and carries the switching current. The low side and high side MOSFETs are both driven by the PWM output of the UC2856DWG4. In order to ensure accurate voltage regulation, the UC2856DWG4 also has an on-chip power output resistor, a current sense amplifier and a voltage reference circuit. The power output resistor is connected in series between the switching node and the output voltage of the converter and is used to sense the output current. The current sense amplifier is connected to the output voltage of the power output resistor and amplifies the sensed output current to a suitable level. The amplified current is then compared with an internal voltage reference which produces an error voltage. This error voltage is used to control the PWM pulse width, which in turn controls the duty cycle of the MOSFETs. The UC2856DWG4 is a versatile and highly accurate device that can be used in a wide range of applications. It offers high output current capabilities and is equipped with various features and protections to ensure correct and reliable operation. Additionally, its diagnostic features and voltage reference circuit help ensure proper voltage regulation for all types of loads.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description