L6910G

Frequency - Switching:	200kHz
Base Part Number:	L6910
Supplier Device Package:	16-SO
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 150°C (TJ)
Control Features:	Current Limit, Frequency Control, Phase Control, Power Good, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	100%
Series:	--
Voltage - Supply (Vcc/Vdd):	5 V ~ 12 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Obsolete
Packaging:	Tube

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L6910G Application Field and Working Principle

The L6910G is a high performance DC-DC Switched Controller, capable of managing up to 5A load at 12 V output. It provides an output voltage range of 5V through 16V with adjustable voltage setpoint. It has a wide operating input voltage range (7V to 36V) and provides a high efficiency power supply design due to the Synchronous MOSFETs.The L6910G is a voltage regulator with low TCO (total cost of ownership) that is suitable for automotive, industrial and commercial use. It combines a synchronous buck-boost converter, integrated power MOSFETs and programmable features to support application in DC/DC bus Voltage Regulation, Bi-directional Voltage regulation, Battery Charger, Programmable output voltage and adjustable current limit applications.

Applications

The L6910G is used for a variety of applications including, but not limited to:

DC/DC Bus Voltage Regulation

The L6910G is suitable for notebook computers, where changing power levels are frequently required, as well as for high-end industrial applications such as DVRs and embedded PCs. The L6910G is able to adjust to the power needs of the system and keep the output voltage within a certain range.

Bi-directional Voltage Regulation

The L6910G can be used in applications where the input voltage can vary, such as automotive or battery powered systems. In these applications, the L6910G is able to adjust the output voltage to remain within a certain range.

Battery Charger

The L6910G can be used in battery powered applications to ensure that the battery is charged properly and efficiently. The L6910G can adjust the output voltage and current to match the particular battery being charged.

Programmable Output Voltage and Current Limiting

The L6910G supports programmable output voltage and adjustable current limiting to protect the device from over current and overvoltage conditions.

Working Principle

The operating principle of the L6910G is based on a synchronous buck-boost controller. The power stage is integrated into the system, utilizing synchronous MOSFETs, allowing for higher efficiency.The synchronous buck-boost controller adjusts the output voltage, depending on the input voltage which enables it to support applications which require variable power levels as previously mentioned.The L6910G can be programmed to output either a constant voltage or a constant current. In constant voltage mode, the L6910G will adjust the current so that it delivers the desired voltage. In constant current mode, the L6910G will adjust the voltage so that it delivers the desired current. The L6910G also supports programmable soft start, providing a gradual ramp up of the output voltage.The L6910G can also detect current and voltage conditions and take appropriate measures to protect the system, such as reducing the output voltage or limiting the current flow.

Conclusion

The L6910G is a high performance DC-DC Switched Controller that is suitable for a variety of applications including DC/DC Bus Voltage Regulation, Bi-directional Voltage regulation, Battery Charger, Programmable output voltage and adjustable current limit applications. It is capable of managing up to 5A load at 12V output and provides a high efficiency power supply design due to the Synchronous MOSFETs. The L6910G can be programmed to output either a constant voltage or a constant current and also supports programmable soft start and protection from overcurrent and overvoltage conditions.

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