Software
Support software
TIPD103
Bridge-tied load (BTL) V-I converter, 0.5 V to 4.5 V and up to ±2-A reference design
TIPD103
Overview
This verified design circuit is a bidirectional current source that can be used to drive floating loads, specifically thermo-electric coolers (TECs) from a single-ended source. The circuit makes use of an internal output current monitor circuit (IMON), which is a special feature of the OPA569 power amplifier. The V-I transfer function is accomplished by using the IMON current as the feedback for the first amplifier. This enables the user to create an input signal that cancels the IMON current to achieve a well regulated output current. The second amplifier inverts the output of the first amp to achieve the bridge tied load (BTL) operation, doubling the voltage swing and slew rate across the load, allowing for bidirectional operation and good voltage swing on the single-ended power supply. The excellent output swing-to-rail of the OPA569 allows for 4.5 V of usable output voltage at 2 A output current with a 5 V single-ended power supply.
Features
- Converts Voltage to current: 0.5 - 4.5 V input, +/- 2A output
- 5 % Error for coarse bi-directional high-current regulation
- Single-supply bridge-tied-load solution has excellent output swing to rails at +/-2A
- Design allows for a floating load
- Unique topology and V-I transfer function using OPA569 special IMON feature
-
- Theory
- Component Selection
- TINA-TI Simulation
- Schematics and PCB Layout
- Verification and Measured Performance
- Modification Options
This Verified Design Includes:
Industrial
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDR182.PDF (99 K)
Detailed schematic diagram for design layout and components
SLAC574.ZIP (790 K)
Detailed schematic diagram for design layout and components
TIDR206.PDF (62 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDC142.ZIP (524 K)
Design file that contains information on physical board layer of design PCB
Products
Includes TI products in the design and potential alternatives.
Start development
Technical documentation
= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 1
| Type | Title | Date | ||
|---|---|---|---|---|
| * | User guide | TIPD103 Verified Design Reference Guide | Jun. 18, 2013 |
Related design resources
Design tools & simulation
SIMULATION TOOL
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.