Automotive low-noise, 350-mA, 410-kHz transformer driver for isolatedd power supplies


Product details


Rating Automotive Iout (A) 0.25 Vin (Min) (V) 3 Vin (Max) (V) 5.5 Output voltage (Min) (V) 0 Output voltage (Max) (V) 11 Soft start No Operating temperature range (C) -40 to 125 Iout (Max) (A) 0.5 Switching frequency (Min) (kHz) 410 Switching frequency (Max) (kHz) 620 Switch current limit (Typ) (A) 0.5 open-in-new Find other Transformer drivers

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 open-in-new Find other Transformer drivers


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results
    • Device Temperature Grade 1: –40°C to 125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C4B
  • 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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The SN6501-Q1 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-Q1 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-Q1 is available in a small SOT-23 (5) package, and is specified for operation at temperatures from –40°C to 125°C.

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Technical documentation

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The SN6501-Multi-Xfmr EVM is configured with five independent circuits providing options to operate using either a +3.3Vdc or +5.0Vdc input and provides isolated 3.3Vdc or 5.0Vdc outputs. Two of the circuits include LDO's to regulate the output. The five configurations include 3Vdc-to-3Vdc with no (...)

  • Push-Pull Driver for Small Transformers
  • Single 3.3V or 5V Supply
  • High Primary-side Current Drive
  • Low Ripple on Rectified Output

Design tools & simulation

SLLM173A.ZIP (2 KB) - PSpice Model
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide

Reference designs

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TIDA-01605 — This reference design is an automotive qualified isolated gate driver solution for driving Silicon Carbide (SiC) MOSFETs in half bridge configuration. The design includes two push pull bias supplies for the dual channel isolated gate driver respectively and each supply provides +15V and -4V output (...)
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Scalable automotive HEV/EV 6s to 96s lithium ion cell supervision demonstrator reference design
TIDA-01537 — This reference design is a small-sized cell supervision demonstrator design for a centralized battery management system (BMS). Its configurable capacitive isolation daisy chain solution enables monitoring and protecting cells ranging from 6-series to 96-series, which allows its use in BMS systems (...)
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Automotive shunt-based isolated current sensor reference design for DC/DC and OBC applications
TIDA-020018 — This reference design demonstrates high-side primary current sensing in DC/DC converter and onboard charger (OBC) applications for hybrid and electric vehicles. Using an isolated shunt approach for current sensing has several advantages, including high accuracy, linearity and robustness. However (...)
document-generic Schematic document-generic User guide
Isolated Current Sense Reference Design (±300 A) for Traction Inverter With Overcurrent Detection
TIDA-01543 — This reference design provides detection of traction motor phase currents. The TIDA-01543 design realizes an isolated current sensor solution. Precise in-line  huntbased, motor phase current sensing is done with AMC1305M05-Q1 delta-sigma (ΔΣ) modulators and the INA301-Q1 (...)
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Resolver-Based Motor Control Reference Design With a BLDC Motor and C2000™ MCU
TIDA-01507 — The TIDA-01507 reference design is a generic development platform for motor-control applications. Control for the system comes from the C2000™ TMS320F28069M microcontroller (MCU). The 3-phase BLDC gte driver, DRV8305-Q1 drives a BLDC motor whereas the resolver-to-digital converter PGA411-Q1 (...)
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Automotive High-Voltage and Isolation Leakage Measurements Reference Design
TIDA-01513 — The function of this reference design is to monitor the isolation resistance of a high-voltage bus to the chassis ground. Monitoring the isolation strength of coupling devices and components from high voltage to the chassis ground is a necessary feature in HEV’s and EV’s as battery (...)
document-generic Schematic document-generic User guide
Automotive Reinforced Isolation CAN Reference Design
TIDA-01255 — The TIDA-01255 design is built for isolated CAN communication, which is widely used in automotive environments. In hybrid and electric vehicles (HEV/EVs), a complete high-voltage network is floating with respect to the chassis ground. Isolation is required for the power and communication channels (...)
document-generic Schematic document-generic User guide
Thermal Protection Reference Design of IGBT Modules for HEV/EV Traction Inverters
TIDA-00794 The TIDA-00794 reference design is a temp sensing solution for IGBT thermal protection in HEV/EV traction inverter system. It monitors the IGBT temperature via the NTC thermistor integrated inside the IGBT module. It provides thermal shut down to the IGBT gate drivers once the NTC thermistor (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 5 View options

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