Sure Electronics TL494 User manual
2004-2013 Sure Electronics Inc. PS-SP12148_Ver1.0
500W Boost Converter for CAR Audio
– TL494
User’s Guide
500W Boost Converter for CAR Audio - TL494
2004-2013 Sure Electronics Inc. PS-SP12148_Ver1.0
To keep the product in a best working condition and having a long service time, please operate it according to
the relevant steps. The warranty lapses if the product is damaged because of incorrect use and your
negligence.
Please read this manual carefully before you use the product and check if the product is a good one. DC12V
is recommended to be used to power the product for one hour. Never use this product in an extreme
condition.
Warning: Never immerse the product in the rain or any other humid environment to prevent the fire or
electric shock.
Safety Precautions:
1. This product is designed for Car audio amplifier. Please fix it well.
2. Protect this product well and move away metal objects from this product.
500W BOOST CONVERTER FOR CAR AUDIO
- TL494
USER’S GUIDE
2004-2013 Sure Electronics Inc. PS-SP12148_Ver1.0_Page i
Table of Contents
Chapter 1. Overview ..........................................................................................................1
1.1 Overview.............................................................................................................. 1
1.2 Features............................................................................................................... 2
1.3 Applications......................................................................................................... 2
1.4 Benefits................................................................................................................ 2
1.5 Quick Start ........................................................................................................... 3
Chapter 2. Hardware Detail ...............................................................................................4
2.1 Input Connection................................................................................................. 4
2.2 Output Connection.............................................................................................. 4
2.3 Enable Pin Connection....................................................................................... 4
2.4 LED Indicator....................................................................................................... 4
Chapter 3. Electrical Characteristics ...............................................................................5
Chapter 4. Mechanical Drawing........................................................................................6
Chapter 5. Contact Us .......................................................................................................7
500W BOOST CONVERTER FOR CAR AUDIO
- TL494
USER’S GUIDE
2004-2013 Sure Electronics Inc. PS-SP12148_Ver1.0_Page ii
NOTES:
Product Version ：Ver 1.0
Document Version ：Ver 1.0
500W BOOST CONVERTER FOR CAR AUDIO
- TL494
USER’S GUIDE
2004-2013 Sure Electronics Inc.
PS-SP12148_Ver1.0_Page 1
1.1 Overview Welcome to use this self-made 500W Boost Converter for CARAudio - TL494. This item
is especially designed for CAR audio. It can be used with amplifiers from Sure
Electronics. With DC12V input, it can output voltage of DC18V, DC24V, DC30V, DC36V,
DC48 and power of up to 500W. You can set DIP switches to get the voltage required in
your applications. Do turn off the power before adjust the voltage.
DIP Switch Settings and Voltage
VOUT K1 K2 K3 K4
24V ON OFF OFF OFF
30V OFF ON OFF OFF
36V OFF OFF ON OFF
40V OFF OFF OFF ON
48V OFF OFF OFF OFF
Please adjust the adjustable resistance-R27 if you want to get more precise voltage.
FIGURE 1-1 OVERVIEW
Chapter 1. Overview
500W Boost Converter for CAR Audio - TL494
2004-2013 Sure Electronics Inc. PS-SP12148_Ver1.0_Page 2
1.2 Features
A mature DC/DC Boost Converter
LED status indicator
Voltage adjustable via DIP switch
A smart cooling fan
Input lines with fuses protection
1.3 Applications
Car audio power conversion
1.4 Benefits
Excellent heat dissipation eliminates the requirement of an extra heat sink.
Rigorous component selection, layout and test to ensure performance stability
Kinds of output voltage selectable
EN pin for external connection
Wide input voltage range
Wide output voltage range
Output voltage can be fine-tuned by rotating the adjustable resistance
Low-voltage protection (10V)
Over-voltage protection (28V)
500W Boost Converter for CAR Audio - TL494
2004-2013 Sure Electronics Inc. PS-SP12148_Ver1.0_Page 3
1.5 Quick Start
Suggested connection is shown in figure 1-2.
FIGURE 1-2 CONNECTION SCHEMATIC
Note: Please observe the following steps to complete verification so as to ensure the
products are intact during transit.
1. Open the product package and make sure the product is intact (No missing or
damaged components and no deformation.)
2. Please observe the connection schematics when connecting the 500W Boost
Converter for CAR Audio - TL494. Use nearby DC12Vand a multimeter to have a
trial. This 500W Boost Converter for CAR Audio - TL494 can be deemed as
qualified if the indicator keeps on and output voltage is the same or similar
with the value marked.
500W BOOST CONVERTER FOR CAR AUDIO
- TL494
USER’S GUIDE
2004-2013 Sure Electronics Inc.
PS-SP12148_Ver1.0_Page 4
2.1 Input Connection
A high-performance power supply is important for a 500W Boost Converter for CAR
Audio - TL494 to output voltage and work stably. Pay attention to the polarity when
connecting power supply.
2.2 Output Connection
Before power the amplifier, please test if the voltage is what you want and pay attention
to the polarity.
2.3 Enable Pin Connection
When EN pin is suspended or grounded, boost converter works.
When EN pin connects to DC12V, boost converter won’t work.
2.4 LED Indicator
This 500W Boost Converter for CAR Audio - TL494 has one LED indicator which shows
the current operation status. The indicator will be constantly illuminated in green when
the converter works normally.
FIGURE 1-2 LED INDICATOR
Chapter 2. Hardware Detail
500W BOOST CONVERTER FOR CAR AUDIO
- TL494
USER’S GUIDE
2004-2013 Sure Electronics Inc.
PS-SP12148_Ver1.0_Page 5
Following table lists all typical data of the 500W Boost Converter for CAR Audio - TL494.
TABLE 3-1 BASIC PARAMETERS
Parameter Condition Min. Typ. Max.
Supply Voltage - 11V 12V 27V
EN enabled Voltage - 12V
Output Power - - 500W
Oscillation Frequency - - 55KHZ -
Quiescent Current VIN=12V - 20mA -
Operating Temperature - 0℃20℃80℃
Storage Temperature - -20℃20℃105℃
Thermal Shutdown - - 150℃-
Note:
Stresses beyond the listed maximum power supply voltage may cause the
permanent damage to components on board.
Chapter 3. Electrical Characteristics
500W BOOST CONVERTER FOR CAR AUDIO
- TL494
USER’S GUIDE
2004-2013 Sure Electronics Inc.
PS-SP12148_Ver1.0_Page 6
FIGURE 4-1 MECHANICAL DRAWING
Chapter 4. Mechanical Drawing
500W BOOST CONVERTER FOR CAR AUDIO
- TL494
USER’S GUIDE
2004-2013 Sure Electronics Inc.
PS-SP12148_Ver1.0_Page 7
Sure Electronics Co., Ltd.
East zone, 3F, Building 6
Jingang Technology Innovation Center
No.108 Ganjiabian Rd (ZIP: 210000)
Qixia District
Nanjing
P.R.China
Tel: +86-25-68154800-860
Fax: +86-25-68154891-832
Website: www.sure-electronics.com
Email: customerservice@sure-electronics.com
Chapter 5. Contact Us
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