TL3844DG4-8

Series:	--
Packaging:	Tube
Part Status:	Active
Output Type:	Transistor Driver
Function:	Step-Up, Step-Up/Step-Down
Output Configuration:	Positive
Topology:	Boost, Flyback, Forward
Number of Outputs:	1
Output Phases:	1
Voltage - Supply (Vcc/Vdd):	10 V ~ 30 V
Frequency - Switching:	Up to 500kHz
Duty Cycle (Max):	48%
Synchronous Rectifier:	No
Clock Sync:	No
Serial Interfaces:	--
Control Features:	Frequency Control
Operating Temperature:	0°C ~ 70°C (TA)
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	TL3844

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

TL3844DG4-8 is a DC-to-DC Switching Controller adopted by sub-micron CMOS process. It is belong to PMIC - Voltage Regulators - DC DC Switching Controllers. This article will analyze the application field and the working principle of TL3844DG4-8. First of all, let’s talk about the application fields of TL3844DG4-8. This kind of product has two kinds of main application fields, namely, primary side and secondary side switching applications. Generally speaking, the TL3844DG4-8 is mainly applied in the primary side of the application. For example, the handheld applications, digital cameras and various types of cellular phones all need to apply them in the front-end to achieve dc-to-dc conversion. In the secondary side switching application, the TL3844DG4-8 can be used in the output end to adjust the voltage and current for the DC-to-DC conversion.Continue on to discuss the working principle of the TL3844DG4-8. The inner structure includes two main parts: the integrated control circuit and the pulsed gate driving circuit. The control circuit is mainly composed of a primary clock oscillator, an error amplifier, a reference voltage circuit, a soft start circuit, an over-current protection circuit, a thermal shutdown circuit and so on. All of these components are used to provide reference voltage signals, current sensing signals and over-current protection signals to the pulse width modulation pulse circuit. The pulse width modulation pulse circuit consists of high speed current switches, a comparator, an under-voltage detection circuit and a voltage control loop. The above components form an image clock oscillator and can generate a pulse width modulation electric current to drive the high speed current switch. The pulse width modulation current electric circuit is used to drive the switch on and off, and to monitor the switch\'s status. Then, according to the switch\'s status, the electric current flowing through the switch is correctly adjusted, so as to realize the DC-to-DC conversion and the output voltage and current stabilizing.When using the TL3844DG4-8, it must be noted that the output current must not exceed the maximum current limit, which is 1.5A to ensure the safe operation of the device. In addition, the TL3844DG4-8 needs to be matched to the power source during the power supply process. When the application is powered on, the TL3844DG4-8 needs to be accurately monitored and the static parameters such as output voltage, output current and switching frequency need to be adjusted.To sum up, TL3844DG4-8 is a kind of DC-to-DC switching controller which belongs to PMIC - Voltage Regulators - DC DC Switching Controllers. It can be used for primary side and secondary side switching applications in various handheld applications, digital cameras and cellular phones. Its inner structure is composed of two major parts: a control circuit and a pulse width modulation pulse circuit. To ensure the safe operation of the device, the output current must stay under the maximum limit. Moreover, during the power supply process, the input and output parameters need to be accurately adjusted.

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

Part Number	Manufacturer	Price	Quantity	Description