SN6501 Low-Noise 350 mA, 410 kHz Transformer Driver for Isolated Power Supplies | TI.com

SN6501 (ACTIVE)

Low-Noise 350 mA, 410 kHz Transformer Driver for Isolated Power Supplies

 

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&de;C to 125°C.

Features

  • 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

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Parametrics Compare all products in Transformer driver

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (A)
Soft Start
Features
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Rating
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Iout (Max) (A)
Shutdown Current (Typ) (uA)
Pin/Package
Switch Current Limit (Typ) (A)
Type
Undervoltage Lockout
SN6501 SN6505A SN6505B
3     2.25     2.25    
5.5     5.5     5.5    
0     0     0    
11     16     16    
0.25     1     1    
No     Yes     Yes    
N/A     Enable
Power Good
Short-circuit protection
Spread spectrum clocking
Thermal shutdown
Slew-rate control    
Enable
Power Good
Short-circuit protection
Spread spectrum clocking
Thermal shutdown
Slew-rate control    
410     100     100    
620     600     1600    
Catalog     Catalog     Catalog    
-40 to 125     -55 to 125     -55 to 125    
SOT-23 | 5     SOT-23 | 6     SOT-23 | 6    
5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)     6SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 6)     6SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 6)    
0.5     1.5     1.5    
N/A     1     1    
5SOT-23     6SOT-23     6SOT-23    
0.5     2     2    
Transformer Driver     Transformer Driver     Transformer Driver    
N/A     Vin<1.7     Vin<1.7V