TL594CDTBR2

Frequency - Switching:	300kHz
Base Part Number:	TL594
Supplier Device Package:	16-TSSOP
Package / Case:	16-TSSOP (0.173", 4.40mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Dead Time Control, Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	48%
Series:	SWITCHMODE™
Voltage - Supply (Vcc/Vdd):	7 V ~ 40 V
Output Phases:	1
Number of Outputs:	2
Topology:	Buck, Push-Pull
Output Configuration:	Positive
Function:	Step-Down, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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

TL594CDTBR2 Application Field and Working Principle

Introduction

The TL594CDTBR2 is a high performance bipolar switching mode power supply controller primarily intended for off-line and DC to DC converter applications. It offers the designer a cost effective solution with minimal external components. The device uses current-mode control providing high gain and system stability.

Application Field

The TL594CDTBR2 has many applications in off-line and DC to DC converter circuits. It can be used in television SMPS, audio amplifiers, CPU core voltage regulators and DC to DC converters. It is suitable for a wide range of input voltages, output voltages and switching frequencies.

Working Principle

The TL594CDTBR2 works in a very simple manner. It is a voltage-mode current-mode controller that charges and discharges an external capacitor with a switching frequency set by an external resistor. The device senses the peak current flow through a power transistor to control overall operation. The external reference voltage and the voltage at the frequency-setting pin set the switching frequency. When the input voltage is lower than the reference voltage, the TL594CDTBR2 turns on its output to the power transistor. This allows the current to constructively flow from the power transistor to the capacitor thus charging it up. When the input reaches the reference voltage the device turns off the output turning off the power transistor. This releases the charge stored in the capacitor which is then directed to the output producing an approximately constant output voltage. The TL594CDTBR2 uses transconductance error amplifier and output oscillator stages. The error amplifier acts as a differential amplifier with the positive and negative inputs comparing the reference input voltage and the output voltage. If the reference voltage is higher than the output voltage then the error amplifier determines the output of the oscillator needs to be higher. This increases the conduction time of the power transistor forming a larger current to the capacitor which in turn increases the output voltage.

Safety Features

The TL594CDTBR2 comes with a range of safety features to ensure the safety of the load and the device itself. The built-in Under Voltage Lockout (UVLO) feature prevents the device from turning on before the set voltage level, ensuring the device does not accidently overload the power source. The device also comes with internal thermal shutdown to prevent the device from overheating and damaging the rest of the circuit. The TL594CDTBR2 also has current limiting and short-circuit protection built into the device. This prevents the device from switching on in the case of short-circuiting or over loading the power source.

Conclusion

The TL594CDTBR2 is a high performance switching mode power supply controller intended for off-line and DC to DC converter applications. With minimal external components and accurate current-mode control, the device provides a cost effective solution with strong protection features. It can be used in television SMPS, audio amplifiers, CPU core voltage regulators and DC to DC converters, making it an ideal choice for a wide range of input and output voltages and switching frequencies.

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

Part Number	Manufacturer	Price	Quantity	Description