SN6501_15 Datasheet, PDF (1/34 Pages) Texas Instruments – SN6501 Transformer Driver for Isolated Power Supplies

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SN6501
SLLSEA0G – FEBRUARY 2012 – REVISED SEPTEMBER 2014
SN6501 Transformer Driver for Isolated Power Supplies
1 Features
•1 Push-Pull Driver for Small Transformers
• Single 3.3-V or 5-V Supply
• High Primary-side Current Drive:
– 5-V Supply: 350 mA (Max)
– 3.3-V Supply: 150 mA (Max)
• Low Ripple on Rectified Output Permits Small
Output Capacitors
• Small 5-Pin SOT-23 Package
2 Applications
• Isolated Interface Power Supply for CAN, RS-485,
RS-422, RS-232, SPI, I2C, Low-Power LAN
• Industrial Automation
• Process Control
• Medical Equipment
3 Description
The SN6501 is a monolithic oscillator/power-driver,
specifically designed for small form factor, isolated
power supplies in isolated interface applications. The
device drives a low-profile, center-tapped transformer
primary from a 3.3-V or 5-V DC power supply. The
secondary can be wound to provide any isolated
voltage based on transformer turns ratio.
The SN6501 consists of an oscillator followed by a
gate drive circuit that provides the complementary
output signals to drive the ground referenced N-
channel power switches. The internal logic ensures
break-before-make action between the two switches.
The SN6501 is available in a small SOT-23 (5)
package, and is specified for operation at
temperatures from –40°C to 125°C.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
SN6501
SOT-23 (5)
2.90 mm x 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
Output Voltage and Efficiency vs Output Current
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.