TL494CN Circuit Diagram & Datasheet | Pinout onsemi

Explore the TL494CN Reference Manual for detailed circuit diagrams, pinout information, and application circuits. This comprehensive guide includes essential details for power supply design, inverter circuits, voltage regulation, and equivalent circuits, ensuring you have everything needed for your project.

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Herunterladen: TL494CN Datasheet PDF

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Ausgabetyp: Transistortreiber

Funktion: Abwärts, Aufwärts/Abwärts

Ausgabekonfiguration: Positiv

Paket: 16-DIP (0,300, 7,62 mm)

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TL494CN Pinout Equivalent

tl494cn pinout

1：Overview of the TL494CN：

The TL494CN is a high-performance pulse-width modulation (PWM) controller IC designed for switch-mode power supplies and DC-DC converters. As a member of Texas Instruments’ classic PWM controller series, it is widely used in industrial equipment, communication power supplies, and consumer electronics due to its high reliability and flexible configuration.Supports push-pull or single-ended output modes, with a maximum output frequency of up to 300 kHz, suitable for half-bridge, full-bridge, and forward topology configurations.

2：TL494CN Important pin function definition:

PIN-Nummer	Pin-Name	Beschreibung
Stift1	1 Zoll+	Non-inverting input of error amplifier 1
Stift2	1IN−	The inverting input of error amplifier 1
Stift16	2IN+	The non-inverting input of error amplifier 2
Teilen15	2IN−	The inverting input of error amplifier 2
Teilen8	C1	Collector terminal of BJT output 1
Stift11	C2	The collector terminal of BJT output 2
Stift5	CT	Terminal for setting the oscillator frequency
Stift4	DTC	Dead zone time control comparator input
Teilen9	E1	Emitter terminal of BJT output 1
Teilen10	E2	The emitter terminal of BJT output 2
Stift3	FEEDBACK	Feedback input pin
Stift7	Masse	Masse
Pin13	OUTPUT CTRL	Select single-ended/parallel output or push-pull mode
Pin14	REF	5V voltage regulator output
Stift6	RT	The terminal used to set the oscillator frequency
Stift12	Vcc	Vcc

3: Alternative Modellempfehlung

KA7500B：The KA7500B is a high-performance pulse-width modulation (PWM) control chip commonly used in switching power supply circuits. It functions similarly to chips like the TL494CN, featuring a dual-output design with built-in oscillators, error amplifiers, and comparators to achieve precise PWM control.
KA7500B
TL594：TL594 is a powerful pulse-width modulation (PWM) controller integrated circuit, similar to the TL494CN. It features dual-ended output capability, supporting various output modes such as push-pull and single-ended, making it suitable for switch-mode power supply designs in half-bridge, full-bridge, and forward converter topologies.
TL594
SG3524：SG3524 is a classic pulse-width modulation (PWM) controller chip widely used in switching power supplies. It integrates key modules such as an oscillator, error amplifier, and PWM comparator to generate stable and adjustable PWM signals, enabling precise control of the power output voltage and current.
SG3524

Comparison of main parameters for several models

Parameter	TL494CN	KA7500B	TL594	SG3524
Ausgabemodus	Dual-ended output, supports push-pull and single-ended modes	Dual-ended output, similar to TL494CN	Dual-ended output, similar to TL494CN	Dual-ended output, suitable for push-pull and half-bridge topologies
Operating Frequency Range	Up to 300kHz, set by external RC	Similar to TL494CN	Similar to TL494CN	Adjustable by external RC
Built-in Modules	Oscillator, two error amplifiers, comparator	Similar to TL494CN	Similar to TL494CN	Oscillator, error amplifier, PWM comparator
Protection Features	Undervoltage lock-out (UVLO), over-current protection (OCP), soft-start	Similar to TL494CN	Similar to TL494CN	Undervoltage lock-out, current-limiting protection
Drive Capability	Can drive power transistors	Similar to TL494CN	Similar to TL494CN	Can drive power transistors