L6712Q

Frequency - Switching:	150kHz
Base Part Number:	L6712
Supplier Device Package:	36-VFQFPN (6x6)
Package / Case:	36-VFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Frequency Control, Phase Control, Power Good
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	80%
Series:	--
Voltage - Supply (Vcc/Vdd):	7.5 V ~ 15 V
Output Phases:	2
Number of Outputs:	2
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The L6712Q is a DC-DC switching controller that uses a broad range of features to provide a solution for a variety of applications. It is a highly integration product and makes system design easier. This switching controller supports constant voltage and constant current mode, to meet the requirements for different power supply applications. It also has the feature of output voltage accuracy, fast response and high efficiency. This makes it an ideal solution for applications such as PCMs, power adaptors and power electronic equipments, etc.

Features

The L6712Q DC-DC switching controller has many advantages. It has the ability to adjust the output voltage and current according to the requirement of the application. The output voltage accuracy and the fast response time allow for the conversation of energy to be efficient and fast. This product also supports the synchronization mode, providing the capability of multi-channel design, which reduces the cost and complexity of the power management system.It also comes with other unique features. It can generate primary-side regulation which brings out comprehensive power management systems. There is also a power-saving mode which can operate as low as 10%. This reduces the quiescent current of the system significantly. It also has different protection features, such as cycle-by-cycle current limit, over-voltage protection and under-voltage protection, etc. It also has a low EMI function to reduce interference effects.

Application Fields

The L6712Q has a variety of applications fields. It is mainly used in power adapter, battery chargers, PCM, TV, white goods, smart energy power supplies and power electronic equipments. It can also be used in automotive electronics, such as car audio and car navigation systems. It is also suitable for applications that require a high output power, such as LED lighting, wireless power supplies, and power tools.

Working Principle

The L6712Q DC-DC switching controller follows a pulse-width modulation (PWM) principle. The integrated pulse-width modulator (PWM) will generate PWM signals that control the power switch circuit on and off. The power switch will take 12V input and convert it to the desired output voltage, which is adjustable from 0V to 12V according to the application.The pulse width portion of the PWM controls the power switch on and off times, as well as forms a fixed oscillation frequency. This frequency can be adjusted with a frequency compensation pin, which changes the proportion of power switch on and off times. The power switch on and off times changes with the application loads, therefore the output voltage will remain constant.

Conclusion

The L6712Q is a highly advanced and integrated DC-DC switching controller that offers the features of output accuracy, synchronize mode, low EMI, primary-side regulation and power saving mode. It is used in a variety of applications, and the PWM principle is used to control the output voltage. This controller is an ideal solution for applications such as power adapters, battery chargers, PCMs, TV, white goods, smart energy power supplies and power electronic equipments, etc.

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