Product details

Rating Automotive Output current (A) 0.35 Vin (Min) (V) 3 Vin (Max) (V) 5.5 Soft start No Operating temperature range (C) -40 to 125 Iout (Max) (A) 0.5 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 620 Vout (Max) (V) 11 Switch current limit (Typ) (A) 0.5 Vout (Min) (V) 0
Rating Automotive Output current (A) 0.35 Vin (Min) (V) 3 Vin (Max) (V) 5.5 Soft start No Operating temperature range (C) -40 to 125 Iout (Max) (A) 0.5 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 620 Vout (Max) (V) 11 Switch current limit (Typ) (A) 0.5 Vout (Min) (V) 0
SOT-23 (DBV) 5 5 mm² 2.9 x 1.6
  • 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
  • Functional Safety-Capable
  • 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
  • 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
  • Functional Safety-Capable
  • 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

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.

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

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Type Title Date
* Data sheet SN6501-Q1 Transformer Driver for Isolated Power Supplies datasheet (Rev. C) 26 Feb 2021
Application note How to Reduce Emissions in Push-Pull Isolated Power Supplies (Rev. A) 05 Oct 2021
Application note How to Isolate Signal and Power for an RS-485 System (Rev. C) 25 May 2021
Application note How to Isolate Signal and Power in Isolated CAN Systems (Rev. C) 25 May 2021
Application note How to Isolate Signal and Power for I2C (Rev. B) 19 May 2021
Analog design journal Design considerations for isolated current sensing 18 Mar 2021
Functional safety information SN6501-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA 18 Jun 2020
Technical article Why signal isolation matters in 48-V HEV/EV systems 20 Nov 2019
Application note High-Side Cutoff Switches for High-Power Automotive Applications (Rev. A) 26 Nov 2018
Application note Simplify current and voltage monitoring with isolated SPI and I2C in your BMS 03 Jul 2018

Design & development

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

Evaluation board

SN6501-MULXFMR-EVM — SN6501 transformer driver for isolated power supplies evaluation module

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 (...)

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Support software

SN650X-TRANS-PARAMETER-CALC

SLLC470.ZIP (205486 KB)
Simulation model

SN6501 Unencrypted PSpice Transient Model Package (Rev. A)

SLLM173A.ZIP (2 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

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 (...)
Reference designs

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The PMP22650 reference design is a 6.6-kW, bidirectional, onboard charger. The design employs a two-phase totem pole PFC and a full-bridge CLLLC converter with synchronous rectification. The CLLLC utilizes both frequency and phase modulation to regulate the output across the required regulation (...)
Reference designs

TIDM-02009 — ASIL D safety concept-assessed high-speed traction, bi-directional DC/DC conversion reference design

This reference design demonstrates control of HEV/EV traction inverter and bi-directional DC-DC converter by a single TMS320F28388D real-time C2000™ MCU. The traction control uses a software-based resolver to digital converter (RDC) driving the motor to a high speed up to 20,000 RPM. The (...)
Reference designs

TIDA-01513 — Automotive High-Voltage and Isolation Leakage Measurements Reference Design

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 (...)
Reference designs

TIDA-01605 — Automotive Dual Channel SiC MOSFET Gate Driver Reference Design with Two Level Turn-off Protection

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 (...)
Reference designs

TIDA-020018 — Automotive shunt-based isolated current sensor reference design for DC/DC and OBC applications

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, (...)
Reference designs

TIDA-01543 — Isolated Current Sense Reference Design (±300 A) for Traction Inverter With Overcurrent Detection

This reference design provides detection of traction motor phase currents. TIDA-01543 realizes an isolated current sensor. Precise in-line huntbased, motor phase current sensing is done with AMC1305M05-Q1 delta-sigma (ΔΣ) modulators and the INA301-Q1 device. The high CMTI of the (...)
Reference designs

TIDA-01255 — Automotive Reinforced Isolation CAN Reference Design

This reference design is built for isolated CAN communication, which is widely used in automotive environments. In hybrid and electric vehicles (HEV/EVs), a high-voltage network is floating with respect to the chassis ground. Isolation is required for the power and communication channels (...)
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SOT-23 (DBV) 5 View options

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