TL1454ACN

Frequency - Switching:	50kHz ~ 2MHz
Base Part Number:	TL1454A
Supplier Device Package:	16-PDIP
Package / Case:	16-DIP (0.300", 7.62mm)
Operating Temperature:	-20°C ~ 85°C (TA)
Control Features:	Dead Time Control, Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	100%
Series:	--
Voltage - Supply (Vcc/Vdd):	3.6 V ~ 20 V
Output Phases:	1
Number of Outputs:	2
Topology:	Buck, Boost, Flyback
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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TL1454ACN is a charge pump DC to DC converter IC specifically designed to manufacture physically small, low-voltage supplies with up to 8.2V of output voltage. It is constructed as a cost-effective, switched capacitor voltage converter solution that can be used to convert a wide range of DC input voltages to output voltages as low as 2.5V. It is usually used as an adjustable voltage regulator and plays an important role in a wide variety of power management applications.The TL1454ACN is basically a current-mode, flyback topology DC to DC switching controller. The typical working voltage is 2V to 10.8V, and its peak output current is usually 4A. The device typically draws current in 1 μA to 2.1 mA, depending on the actual duty cycle. The TL1454ACN supports operation in either pulse skipping or pulse frequency modulation mode, both of which are synchronous operation modes with user adjustable duty cycle.The TL1454ACN application field includes a wide range of applications such as PCMCIA cards and other electronic equipment, printers, hand-held device power supplies and other low-voltage power supply designs. Its robust operating temperature range is -40 ℃ to 85 ℃, which is suitable for cost-sensitive applications.The TL1454ACN adopts internal frequency detection feedback technology and the output current feedback, which can effectively improve the system\'s power conversion efficiency. The synchronization frequency of the switch can cooperate with the external clock to achieve component size reduction, and the switching frequency range is 100KHz to 1MHz. The TL1454ACN provides higher power conversion efficiency and lower component counts compared to conventional low-voltage converters, making it highly cost-effective.Moreover, the TL1454ACN supports the mainstream network power topologies such as flyback, buck boost, forward, and others. It also has fault protection options such as overvoltage, undervoltage, overtemperature and output short circuit. The TL1454ACN also supports a wide range of switching frequencies and easily detects peak inductor currents with its low inductor ripple current. It is a low-cost, low-power controller solution that can address most common power converter applications due to its compact size and high performance. The principle of operation of the TL1454ACN is based on the switched capacitor. The TL1454ACN contains three basic components: the input capacitor, the switching transistor, and the output capacitor. This circuit uses a linear feedback loop to safely charge and discharge the input and output capacitors. When the control voltage is lower than 0.6V, the N-MOS transistor M1 opens, and the charge pump output voltage is regulated by the output voltage. When the control voltage is higher than 0.6V, M1 will be cut off and the charge pump will be shut off. If the output current is high, the output voltage will be automatically adjusted by the feedback loop, and the voltage drop will be compensated. In conclusion, the TL1454ACN is quite useful in many power management applications due to its small size, cost effectiveness, and ability to achieve higher power conversion efficiency with a lower component count. It is regularly used as an adjustable voltage regulator and supports a wide variety of network topologies. Its wide operating temperature range is suitable for a variety of cost-sensitive applications, and its low switching frequency and low inductor ripple current make it an ideal solution for many power management applications.

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