TL1453CN

Frequency - Switching:	1kHz ~ 500kHz
Base Part Number:	TL1453
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:	No
Duty Cycle (Max):	--
Series:	--
Voltage - Supply (Vcc/Vdd):	3.6 V ~ 40 V
Output Phases:	1
Number of Outputs:	2
Topology:	--
Output Configuration:	Positive
Function:	--
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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TL1453CN is a voltage regulator specifically designed for use in direct current-to-direct current (DC-DC) step-down (BUCK) switching converters. It is a DC-DC switching controller that converts a DC voltage from one level to a lower one. By controlling the pulse width modulated (PWM) output, TL1453CN can operate as a flyback, forward, and bidirectional DC-DC converter.The TL1453CN switching Controller is designed for switch-mode power supplies (SMPS) and is an ideal solution for applications where power savings and reduced power dissipation are required. The device provides an accurate and efficient way of controlling the switch-mode power supply, with low current consumption, low start up current, low standby power, and low EMI (electromagnetic interference).Application FieldThe TL1453CN switching Controller is suitable for use in a wide range of applications, including: • Battery Charging in Portable Systems • Uninterruptible Power Supplies • Automotive Electronics • Telecom Power Supplies • Waterproof Applications • High Voltage AC-DC Power Supplies • Voltage Conversion and Inverting Circuits • Motor Controls • Induction Heating • RoboticsWorking Principle of TL1453CNThe TL1453CN switches a power transistor (usually an N-channel MOSFET) at a fixed frequency, while controlling the duty-cycle based on the output of the error amplifier. The output voltage is sensed through an external divider and the error-amplifier sends out a voltage ramp proportional to the output voltage.The TL1453CN accepts a logic level input for the control of the switching frequency. A higher voltage output requires a larger voltage ramp. The user may choose the optimal frequency for the application.The device is configured to automatically power itself down when the output is shorted or overloaded. The device also features a sleep mode that allows it to reduce its current consumption in standby or in a no-load condition.The TL1453CN provides protection against over-current, under-voltage lock-out, and over-temperature. The device can be configured for either current limiting or fold back current. The output voltage is adjustable via an external voltage divider. The device can also be configured to be input or output current-limited via an external MOSFET.The TL1453CN is housed in an 8-pin SOIC package. The device is manufactured using an advanced Bipolar CMOS (BiCMOS) process. All necessary components are included on the chip, including the comparator, power switch, voltage reference, and error amplifier.ConclusionThe TL1453CN switching controller is an extremely versatile, low-noise and efficient solution ideal for regulating direct current-to-direct current (DC-DC) step-down converters in many applications. It is designed for switch-mode power supplies (SMPS) with low current consumption, low start-up current, low standby power, and low EMI (electromagnetic interference). The device also features a sleep mode that allows it to reduce its current consumption in standby or a no-load condition. The TL1453CN is an excellent choice for applications requiring an accurate and reliable power control solution.

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