NCP1583DR2G

Frequency - Switching:	300kHz
Base Part Number:	NCP1583
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable, Phase Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	75%
Series:	--
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 13.2 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The NCP1583DR2G is a synchronous buck half-bridge PWM controller specifically designed for high power DC/DC applications. This device is highly integrated and supports a wide range of applications, including processor cores, memory, and core voltage regulation, as well as general-purpose industrial, automotive, and telecom applications.

Application Field

NCP1583DR2G is designed to be used in buck-derived voltage regulator topologies, allowing the system designer to achieve controlled switching times, fast transient response, and stable loop control. It can be used in hardware implementation of a variety of advanced control techniques, such as Selective Memory Resynchronization, Adaptive Loop Regulation, and Adaptive Regulating Output Search.This device is an ideal choice for applications that require higher output power, wide input/output voltage range, high efficiency, low ripple, and fast response time. It is suitable for intermediate bus voltage regulation of base transceivers, RF transceivers, DSPs processors, FPGAs, and ASICs.NCP1583DR2G is also excellent for point-of-load (PoL) supplies used in communication, industrial, and automotive applications. It can be used for regulated DC/DC converters, POL switching regulators, and automotive 12V to 5V and 24V to 12V converters.

Working Principle

NCP1583DR2G is designed to operate in a synchronous buck half-bridge configuration. A synchronous buck half-bridge circuit consists of two full bridges. Each full bridge is composed of four MOSFETs, two upper MOSFETs and two lower MOSFETs. The upper MOSFETs are connected to the input voltage, while the lower MOSFETs are connected to the output voltage.When the input voltage is applied, the bridge MOSFETs are placed in the “on” state, allowing the current to flow from input to output. When the output voltage reaches the desired value, the feedback circuit is triggered and the MOSFETs are switched “off”. Thus, the current is no longer allowed to flow from the input to the output, resulting in the desired output voltage.This buck half-bridge operation is enabled by the digital PWM controllers, which are controlled by the integrated NCP1583DR2G PWM controller. This PWM controller maintains a constant frequency, ensuring fast response and regulation times. The device also supports a wide range of current sensing techniques and is able to accurately detect current overloads.

Conclusion

The NCP1583DR2G is a highly integrated buck half-bridge PWM controller designed to meet the demands of a wide range of applications in the DC/DC voltage regulator field. It is ideal for applications that require higher output power, wide input/output voltage range, high efficiency, and fast response time. The device is designed to operate on a synchronous buck half-bridge configuration and offers reliable current sensing, fast transient response, and stable loop control.

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