AZ7500CUMTR-EA

Voltage - Supply (Vcc/Vdd):	7 V ~ 36 V
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	45%
Frequency - Switching:	1kHz ~ 200kHz
Series:	--
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The AZ7500CUMTR-EA is a high-performance, fixed-frequency, Pulse Width modulation (PWM) DC-DC controller from AZ Microelectronics, designed to provide power management for different applications. It is available in through-hole and surface mount packages, allowing it to be easily installed into a variety of applications and environments. This article provides an overview of the AZ7500CUMTR-EA\'s application field and working principle.

Application Field

The AZ7500CUMTR-EA is a general-purpose DC-DC converter – suitable for use in a variety of power supply applications. It is typically used in power supplies that require forced-frequency, low-cost, and high-efficiency solutions.Some of the common applications where the AZ7500CUMTR-EA can be used include ultra-low power systems, data communications systems, cameras and vision systems, portable audio-video systems, automotive control systems, distributed power supplies, and communication systems. It can also be used for the conversion of supply voltages for regulating systems.The AZ7500CUMTR-EA is designed to provide a high output current with a accuracy of ±2%, a fast transient response and an adjustable soft-start feature. It is a highly efficient switching controller with the latest in PWM control technology.

Working principle

The AZ7500CUMTR-EA uses Pulse Width Modulation (PWM) to control the amount of output power in a Step Down Converter. PWM is a form of digital control where the output is switched on and off in a high frequency square wave pattern. The length of time that the output is switched ‘on’ (in relation to the length of time it is ‘off’) determines the amount of output power.The AZ7500CUMTR-EA operates at a fixed frequency of 180KHz and has a voltage feedback loop that allows it to maintain a constant output voltage even when the input supply voltage or the load current changes. The loop is constantly monitoring the output voltage and adjusting the duty cycle of the PWM signal accordingly to maintain a constant output voltage.The AZ7500CUMTR-EA also features adjustable soft-start, pre-bias start-up and hiccup mode over-current protection. The adjustable soft-start is a feature that reduces the maximum inrush current of the converter by gradually increasing the output voltage over a given time period. The pre-bias start-up feature allows the converter to start up even when the output voltage is below the regulation level. The hiccup mode over-current protection will shut down the converter for a set time whenever an over-current or short-circuit condition occurs.

Conclusion

The AZ7500CUMTR-EA is a high performance, fixed-frequency, DC-DC converter used for converting supply voltages for regulating systems. It can be used in a variety of power supply applications and is designed to provide a high output current with a accuracy of ±2%, a fast transient response and an adjustable soft-start feature. The output power is controlled by Pulse Width Modulation and the voltage feedback loop is used to ensure the output voltage is maintained even when the input supply or load current changes. The AZ7500CUMTR-EA also features adjustable soft-start, pre-bias start-up and hiccup mode over-current protection.

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