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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.

Brands: onsemi

Download: TL494CN Datasheet PDF

Price: inquiry

In Stock: 29,782

Output Type: Transistor Driver

Function: Step-Down, Step-Up/Step-Down

Output Configuration: Positive

Package: 16-DIP (0.300, 7.62mm)

TL494CN Pinout Equivalent

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 Number	Pin Name	Description
Pin1	1IN+	Non-inverting input of error amplifier 1
Pin2	1IN−	The inverting input of error amplifier 1
Pin16	2IN+	The non-inverting input of error amplifier 2
Pin15	2IN−	The inverting input of error amplifier 2
Pin8	C1	Collector terminal of BJT output 1
Pin11	C2	The collector terminal of BJT output 2
Pin5	CT	Terminal for setting the oscillator frequency
Pin4	DTC	Dead zone time control comparator input
Pin9	E1	Emitter terminal of BJT output 1
Pin10	E2	The emitter terminal of BJT output 2
Pin3	FEEDBACK	Feedback input pin
Pin7	GND	GND
Pin13	OUTPUT CTRL	Select single-ended/parallel output or push-pull mode
Pin14	REF	5V voltage regulator output
Pin6	RT	The terminal used to set the oscillator frequency
Pin12	Vcc	Vcc

3：Alternative model recommendation

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.

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.

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.

Comparison of main parameters for several models

Parameter	TL494CN	KA7500B	TL594	SG3524
Output Mode	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