Product video Product Picture

TL494 The TL494 PWM Controller incorporates all the functions required in the construction of a pulse width modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application. The TL494 PWM Controller contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits.The error amplifiers exhibit a common-mode voltage range from -0.3 V to VCC -2 V. The dead-time control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can drive the common circuits in synchronous multiple-rail power supplies.The uncommitted output transistors provide either common-emitter or emitter-follower output capability. This PWM Controller provides for push-pull or single-ended output operation, which can be selected through the output-control function. The architecture of this device prohibits the possibility of either output being pulsed twice during push-pull operation.The TL494C PWM Controller is characterized for operation from 0C to 70C. The TL494I is characterized for operation from -40C to 85C. The TL494B is characterized for operation from -40C to 125C. The NCV494B is characterized for -40C to 125C and certified for automotive applications.

Sales：48

113521

5.0 out of 5 stars

1 star 0.3%

2 star 0%

3 star 0.2%

4 star 0.4%

5 star 99.1%

Total products: 2398035

Total sales: 12714591

Average lead time: 0 Hour

Delivery times (Express): 0

Delivery times (Post office): 0

Favorite

TL494

NEW

Utsource certified original

Utsource certified original parts provide the following guarantees:

1. Utsource guarantees 100% original.

2. Utsource certified original parts can be returned and refunded unconditionally within 90 days.

Description

The TL494 PWM Controller incorporates all the functions required in the construction of a pulse width modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application. The TL494 PWM Controller contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits.The error amplifiers exhibit a common-mode voltage range from -0.3 V to VCC -2 V. The dead-time control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can drive the common circuits in synchronous multiple-rail power supplies.The uncommitted output transistors provide either common-emitter or emitter-follower output capability. This PWM Controller provides for push-pull or single-ended output operation, which can be selected through the output-control function. The architecture of this device prohibits the possibility of either output being pulsed twice during push-pull operation.The TL494C PWM Controller is characterized for operation from 0C to 70C. The TL494I is characterized for operation from -40C to 85C. The TL494B is characterized for operation from -40C to 125C. The NCV494B is characterized for -40C to 125C and certified for automotive applications.

Title

PWM Controller (up to 200 kHz)

ECAD Module
Manufacturer Part Number: TL494
Brand: EST
DateCode: 10+
Package / Case: SOP16
Category: Integrated Circuits (ICs)
Warranty: 100% Perfect Functions

All product names, trademarks, brands and logos used on this site are the property of their respective owners. The depiction, description or sale of products featuring these names, trademarks, brands and logos is for identification purposes only and is not intended to indicate any affiliation with or authorization by any rights holder.

ECAD Module

Product Attributes

Description: The TL494 is a fixed frequency pulse width modulation control circuit, incorporating the primary building blocks required for the control of a switching power supply. Features: Internal Regulated 5V Reference Pulse-Width Modulation Control Circuitry Output Control for Single-Ended or Push-Pull Configuration Output Clamp Diodes Output Offset Voltage Adjustment Internal Dead-Time Control Internal Soft-Start Internal Frequency Compensation Output Current Limiting Thermal Shutdown Applications: Switching Power Supplies Uninterruptible Power Supplies Motor Control Lighting Control Battery Chargers DC-DC Converters (For reference only)

TL494 is a PWM (pulse width modulation) control IC. It can be used in any application where PWM control can be used from a feedback signal input such as voltage regulators, Power supplies, heating element temperature controllers, motor speed controllers etc. TL494 consist of all the required peripherals which require to PWM control a load. TL494 comes in a 16 pin DIP package. you can see the pinout of the TL494 in below.

SupplierFile/202006/05/f_e250e685b5684de4bf6ca18c2d041613.png

Lets go through some of the features of the TL494 PWM controller IC,

· Output selectable sink or source current outputs

· Selectable single ended or push pull output operation types

· Inbuilt double pulse prevention circuitry

· Variable dead time capabilities throughout the whole range

· Internal 5V stable reference voltage

· Easy synchronization capabilities

As discussed, earlier TL494 is suitable for lots of application we are going to consider high current power supply. Usually voltage regulator IC can handle couple of amperes in output side. However, when high current is needed we need to go for SMPS which are expensive when the output current is high. So lets see how to build 5V 10A regulator using TL494. You can see the circuit for the above mentioned circuit in below image.

SupplierFile/202006/05/f_cc9471853ab9472ca4ec5a90decce95c.png

In here one signal transistor and one power transistor is used to control the load power. R8 and R9 are acting in a voltage divider to give TL494 a feedback on the output voltage. When the output voltage varies from the set voltage TL494 will increase or decrease the pulse width of the switching signal to match the output voltage to the set voltage. There are some filter and reference RC circuitry in the circuit. The connections for these RC circuits are given in the datasheet of the TL494 IC. By using high power transistors and suitable values or the voltage divider we can built any voltage current regulators using TL494 PWM controller IC. Also this can be used with a variable voltage divider to build a variable supply suitable for a lab bench supply.

Preview of the first 3 pages of the data sheet

Document Preview

SWITCHMODETM Pulse Width Modulation Control Circuit

The is a fixed frequency, pulse width modulation control circuit designed primarily for SWITCHMODE power supply control.

Features

Complete Pulse Width Modulation Control Circuitry On-Chip Oscillator with Master or Slave Operation On-Chip Error Amplifiers On-Chip 5.0 V Reference Adjustable Deadtime Control Uncommitted Output Transistors Rated 500 mA Source or Sink Output Control for Push-Pull or Single-Ended Operation Undervoltage Lockout NCV Prefix for Automotive and Other Applications Requiring Site

MAXIMUM RATINGS (Full operating ambient temperature range applies, unless otherwise noted.)
Power Supply Voltage Collector Output Voltage
Collector Output Current (Each transistor) (Note 1)

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. 1. Maximum thermal limits must be observed.

I = Assembly Location = Wafer Lot = Year = Work Week = Pb-Free Package

*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.

See detailed ordering and shipping information in the package dimensions section on page 4 of this data sheet.

Power Supply Voltage Collector Output Voltage Collector Output Current (Each transistor) Amplified Input Voltage Current Into Feedback Terminal Reference Output Current Timing Resistor Timing Capacitor Oscillator Frequency

ELECTRICAL CHARACTERISTICS (VCC = 0.01 mF, = 12 kW, unless otherwise noted.) For typical values = 25°C, for min/max values TA is the operating ambient temperature range that applies, unless otherwise noted.

Collector-Emitter Saturation Voltage (Note 2) Common-Emitter (VE = 200 mA) Emitter-Follower (VC = -200 mA)

Output Control Pin Current Low State (VOC 0.4 V) High State (VOC = Vref)
Output Voltage Rise Time Common-Emitter (See Figure 12) Emitter-Follower (See Figure 13)
Output Voltage Fall Time Common-Emitter (See Figure 12) Emitter-Follower (See Figure 13)

2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.

ERROR AMPLIFIER SECTION Input Offset Voltage (VO (Pin 2.5 V) Input Offset Current (VO (Pin 2.5 V) Input Bias Current (VO (Pin 2.5 V) Input Common Mode Voltage Range (VCC = 25°C) Open Loop Voltage Gain (DVO = 2.0 kW) Unity-Gain Crossover Frequency (VO = 2.0 kW) Phase Margin at Unity-Gain (VO = 2.0 kW) Common Mode Rejection Ratio (VCC 40 V) Power Supply Rejection Ratio (DVCC = 2.0 kW) Output Sink Current (VO (Pin 0.7 V) Output Source Current (VO (Pin 3.5 V)

PWM COMPARATOR SECTION (Test Circuit Figure 11) Input Threshold Voltage (Zero Duty Cycle)

Input Sink Current (V(Pin 0.7 V) DEADTIME CONTROL SECTION (Test Circuit Figure 11) Input Bias Current (Pin 4) (VPin 5.25 V) Maximum Duty Cycle, Each Output, Push-Pull Mode

(VPin = 0.01 mF, = 12 kW) (VPin = 0.001 mF, = 30 kW) Input Threshold Voltage (Pin 4) (Zero Duty Cycle) (Maximum Duty Cycle)

Frequency Change with Temperature (DTA = Tlow to Thigh) (CT = 0.01 mF, = 12 kW)
Standby Supply Current (Pin 6 at Vref, All other inputs and outputs open) (VCC 15 V) (VCC 40 V)
Average Supply Current (CT = 0.01 mF, = 12 kW, V(Pin 2.0 V) (VCC 15 V) (See Figure 12)

* Standard deviation is a measure of the statistical distribution about the mean as derived from the formula, s

Related products with the same datasheet

NCV494

Compliance : Pb A H P, Topology : Flyback Half-Bridge Push-Pull Step-Down, Phases : 1, Control Mode : Voltage Mode, V_CC Min (V) : 7, V_CC Max (V) : 40, f_SW Typ (kHz)

Some Part number from the same manufacture

J-SERIES SIPM

Silicon Photomultiplier Sensors, J-Series (SiPM). Compliance : Pb A H P, Type : Single, Array Format : , Active Area Dimensions : 3 mm x 3 mm, Microcell

MC100LVE310

Clock / Data Fanout Buffer, 2:8 Differential, ECL, 3.3 V. Compliance : Pb A H P, Type : Buffer, Channels : 1, Input / Output Ratio : 2:1:8, Input Level : ECL,

CPH6102

Bipolar Transisitor, -50V, -1A, Low VCE(sat) PNP Single CPH6. Compliance : Pb A H P, Polarity : PNP, Type : Low V_CE(sat), V_CE(sat) Max (V) : 0.5,

NSR10F20NX

20 V Schottky Diode. Compliance : Pb A H P, Configuration : Single, V_RRM Min (V) : 20, V_F Max (V) : 0.43,

MUN2235

NPN Bipolar Digital Transistor (BRT). Compliance : Pb A H P, Polarity : NPN, I_C Continuous (A) : 0.1, V_(BR)CEO Min (V) : 50, h_FE

EMI9404

EMI Array, 4-Channel, with ESD Protection. Compliance : Pb A H P, Interface : Display Port General I/O, Number of Lines : 4, Filter Type : L-C,

FTCO3V455A2

Automotive Power Integrated Module (PIM), MOSFET, 40 V, 150 A. Compliance : Pb A H P, Configuration : 3-phase Inverter with Sense Resistor, V_BR Max (V) : 40, R_DS(on)

MC33178

Operational Amplifier, Low Power, Low Noise, Dual. Compliance : Pb A H P, Rail to Rail : No, Channels : 2, V_S Min (V) : 4, V_S Max (V) : 36, I_q

NCL30095

LED Driver, AC-DC Power Factor Corrected Boost Switching Regulator, Integrated HV MOSFET, Triac Dimmable, Thermal Foldback. Compliance : Pb A H P, Topology : Step-Up, V_I Min (V) : 30, V_I Max (V) : 380, V_O

LM317

Linear Voltage Regulator, 1.5 A, High PSRR, Adjustable, Positive. Compliance : Pb A H P, Output : Single, Polarity : Positive, V_O (V) : Adj, I_O Typ (A) : 1.5,

Same catergory

NCP81141

Vr12.6 single phase controller.

FAN53555

5 A, 2.4 MHz, Digitally Programmable TinyBuck? Regulator.

NCP1594A

Synchronous DC-DC Step-Down Converter, Integrated, 2.9 to 5.5 V, 4 A, Switches Up to 2 MHz.

NCP51400

3 Amp VTT Termination Regulator DDR1, DDR2, DDR3, LPDDR3, DDR4.

NCP1251

PWM Controller, Current Mode, for Offline Power Supplies.

FSCQ0765RT

650V Integrated Power Switch for 85Watt offline flyback converters.

FSGM0465R

650V Integrated Power Switch with Abnormal OCP for 48Watt offline flyback converters.

SC122

Low Voltage Synchronous Boost Converter.

SC202F

3.5MHz, 500mA Step-down Regulator with Integrated Inductor.

SC4525D

18V, 3A, 350kHz Step-Down Switching Regulator.

Product Reviews

Submit

10000 buyer reviews from United States

mauricio galvez ve17343

TL494

United States miami

Length of registration:5 years

Very satisfied with

Reply0

01/21/2020

Alexander Grigoriev

TL494

Russia Georgievsk

Length of registration:1 years

Thanks!

Reply0

11/19/2019

Sakun Pinto

TL494

Sri Lanka Ragama

Length of registration:11 years

Very satisfied with

Reply0

03/12/2019

Vytautas Kasparavicius

TL4941

Lithuania Taurage

Length of registration:4 years

Fast shipping. Everything works. Thanks seller

Reply0

09/06/2022

Glenroy Miller

TL494C

United States Fort Lauderdale

Length of registration:12 years

Fantastic

Reply0

03/31/2021

HN15871 Raul Rodriguez / Aereo

TL494CDR

United States Doral

Length of registration:4 years

satisfaction

Reply0

07/21/2020

Magdalena Pulido de la Casa

TL494IN

Spain Mostoles

Length of registration:11 years

satisfaction

Reply0

05/01/2020

luis portocarrero troncos

TL494C

Peru jesus maria

Length of registration:5 years

Todo muy bien. atte el che

Reply0

10/19/2018

gezir

TL494CN

Brazil (Justinopolis) Ribeirao das Neves

Length of registration:6 years

very good!

Reply0

04/20/2018

Ricardo de la Barrera

TL494BDG

Mexico Cancun

Length of registration:6 years

Very satisfied with

Reply0

04/19/2018

See all reviews >>

Payment Method

European payment method

Asia payment method

America payment method

International payment method

Shopping process

Search on the website

Send an inquiry
Add to Cart

Add to inquiry cart

Quote
Place Order
Goods warehousing

Package

Ship order out

Latest shipping video More

Shopping Guide Related Search Related Supplier Alternate Names

Shopping Guide

Order

Users could add parts to cart and upload BOM when they searching parts, calculate cost in a second, offer you the best bill of materials.
Some specific products need to reach the minimum order quantity.
Users could get coupons randomly when they applied plus member. Utsource offers different buying options with different product quality from different seller stores when placing orders.
Users could add products to“inquiry cart" and submit your inquiry, utsource will send quotation email to you.
If you need add additional order instructions like Tax Invoice or Remark, please put them on the ordering information page.
All order information could be checked in your "account center"page
Please confirm the product description when placing order.
The order can’t be canceled after shipment, so please email customer service to revise order details before shipment.
Utsource Mobile browser version and APP could be downloaded to find parts anytime, anywhere if needed.
Please choose right language and currency to place order if needed.

Payment

UTSOURCE supports global payments, including mainstream US PAYPAL, credit cards (VISA, MASTERCARD, AMERICAN EXPRESS, JCB), WEST UNION, Moneygram;
Popular payment in Europe: SofortBanking, Trustpay, Paysafecard;
Middle East: CashU, Onecard;
Southeast Asia : MOLPay;
Russia commonly used: Qiwi, Yandex Money, WebMoney;
The Dutch payment: iDEAL, Polish Dotpay,
Brazilian payment: Boleto
These above payments have a high market share in the local area with better payment experience, simpler payment method.

Shipping

USPS, FedEx, DHL, and UPS could be selected.
Express: (FEDEX, UPS, DHL, TNT)Free shipping on first 0.5kg for orders over 200$, Overweight will be charged separately.
It is available for users to select "Freight Collect"depending on their requirement
It may cost additional remote fees for delivery if you are in a remote area.
Shipping price for your order will be calculated automatically in the shopping cart.If you have any questions about shipping costs, you can write to us and we will confirm it manually.
For in-stock parts, orders normally could be shipped out within 1-2days.
Delivery date: usually 2 to 5 working days.
Shipping Tracking Number will be sent by email or you can go to APP or website "account center" to check once your order has been shipped.
Invoice could be downloaded from "account center" > "my invoice" if needed

Gift Coupon/Plus service

You could receive US $5 shipping coupon (applicable to new users)
Offer 30-day PLUS free trial service( The plus service will be stopped automatically after the end of the trial, and no extra charge will be generated. Commodity prices are usually reduced by 10%)
“Funds account” could be used for your next order purchase If you have money that has been returned to your “Funds account”. (You could check it in “My Account” > “Funds account” )
Utsource offers professional customer service worldwide in USA, Mexico, Brazil, Italy, France, Germany and many other places.

Returning

Returns are normally accepted when completed within 60 days from the date of the parcel delivered.

Defective ( Please provide a third party quality report of nonconforming products)

Return Freight charges must be prepaid; we will not accept COD shipments.

Warranty

All UTSOURCE purchases have a 60 days money back return policy, plus a 90 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.

Related Search

TL494 Price
TL494 Pdf
TL494 Hard to find
TL494 Pinout
TL494 Obsolete
TL494 Image
TL494 Buy
TL494 Picture
TL494 Sell
TL494 In Stock
TL494 Search
TL494 Distributor
TL494 Datasheet
TL494 New&Original
TL494 Application
TL494 Series
TL494 Replacement
TL494 TI(EST)
TL494 find
TL494 purchase
TL494 need
TL494 shopping
TL494 store
TL494 Cheap
TL494 transistor
TL494 equivalent
TL494 Electronic Component
TL494 The TL494 PWM Controller incorporates all the functions required in the construction of a pulse width modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application. The TL494 PWM Controller contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits.The error amplifiers exhibit a common-mode voltage range from -0.3 V to VCC -2 V. The dead-time control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can drive the common circuits in synchronous multiple-rail power supplies.The uncommitted output transistors provide either common-emitter or emitter-follower output capability. This PWM Controller provides for push-pull or single-ended output operation, which can be selected through the output-control function. The architecture of this device prohibits the possibility of either output being pulsed twice during push-pull operation.The TL494C PWM Controller is characterized for operation from 0C to 70C. The TL494I is characterized for operation from -40C to 85C. The TL494B is characterized for operation from -40C to 125C. The NCV494B is characterized for -40C to 125C and certified for automotive applications.

Related Supplier

Part Number Seller's Name Stock Brand Package/Case Date Code Description Price

Alternate Names

TL494

TL494 has several brands around the world that may have alternate names for TL494 due to regional differences or acquisition. TL494 may also be known as the following names: