SN6501-Q1

ACTIVE

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

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Product details

Parameters

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 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

Features

  • 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
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Description

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

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
49
Description

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 (...)

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

Software development

SUPPORT SOFTWARE Download
SLLC470.ZIP (205486 KB)

Design tools & simulation

SIMULATION MODEL Download
SLLM173A.ZIP (2 KB) - PSpice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL Download
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

REFERENCE DESIGNS Download
ASIL D safety concept-assessed high-speed traction, bi-directional DC/DC conversion reference design
TIDM-02009 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 DC-DC (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
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
REFERENCE DESIGNS Download
Automotive Dual Channel SiC MOSFET Gate Driver Reference Design with Two Level Turn-off Protection
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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Scalable automotive HEV/EV 6-s to 96-s 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
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
REFERENCE DESIGNS Download
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. 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive Reinforced Isolation CAN Reference Design
TIDA-01255 — 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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

Ordering & quality

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