產品詳細資料

Rating Catalog Iout (typ) (A) 1 Vin (min) (V) 2.25 Vin (max) (V) 5.5 Features Enable, Short-circuit protection, Slew-rate control, Spread spectrum clocking, Thermal shutdown Soft start Yes Operating temperature range (°C) -55 to 125 Iout (max) (A) 1.5 Switching frequency (min) (kHz) 138 Switching frequency (max) (kHz) 203 Switch current limit (typ) (A) 2
Rating Catalog Iout (typ) (A) 1 Vin (min) (V) 2.25 Vin (max) (V) 5.5 Features Enable, Short-circuit protection, Slew-rate control, Spread spectrum clocking, Thermal shutdown Soft start Yes Operating temperature range (°C) -55 to 125 Iout (max) (A) 1.5 Switching frequency (min) (kHz) 138 Switching frequency (max) (kHz) 203 Switch current limit (typ) (A) 2
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • Push-pull driver for transformers
  • Wide input voltage range: 2.25 V to 5.5 V
  • High output drive: 1 A at 5 V supply
  • Low R ON 0.25 Ω max at 4.5 V supply
  • Ultra-low EMI
  • Spread spectrum clocking
  • Precision internal oscillator options: 160 kHz ( SN6505A) and 420 kHz ( SN6505B)
  • Synchronization of multiple devices with external clock input
  • Slew-rate control
  • 1.7 A Current-limit
  • Low shutdown current: <1 µA
  • Thermal shutdown
  • Wide temperature range: –55°C to 125°C
  • Small 6-Pin SOT23 (DBV) package
  • Soft-start to reduce In-rush current
  • Push-pull driver for transformers
  • Wide input voltage range: 2.25 V to 5.5 V
  • High output drive: 1 A at 5 V supply
  • Low R ON 0.25 Ω max at 4.5 V supply
  • Ultra-low EMI
  • Spread spectrum clocking
  • Precision internal oscillator options: 160 kHz ( SN6505A) and 420 kHz ( SN6505B)
  • Synchronization of multiple devices with external clock input
  • Slew-rate control
  • 1.7 A Current-limit
  • Low shutdown current: <1 µA
  • Thermal shutdown
  • Wide temperature range: –55°C to 125°C
  • Small 6-Pin SOT23 (DBV) package
  • Soft-start to reduce In-rush current

The SN6505x is a low-noise, low-EMI push-pull transformer driver, specifically designed for small form factor, isolated power supplies. It drives low-profile, center-tapped transformers from a 2.25 V to 5 V DC power supply. Ultra-low noise and EMI are achieved by slew rate control of the output switch voltage and through Spread Spectrum Clocking (SSC). The SN6505x consists of an oscillator followed by a gate drive circuit that provides the complementary output signals to drive ground-referenced N-channel power switches. The device includes two 1-A Power-MOSFET switches to ensure start-up under heavy loads. The switching clock can also be provided externally for accurate placement of switcher harmonics, or when operating with multiple transformer drivers. The internal protection features include a 1.7 A current limiting, under-voltage lockout, thermal shutdown, and break-before-make circuitry. SN6505x include s a soft-start feature that prevents high inrush current during power up with large load capacitors. SN6505A has a 160 kHz internal oscillator for applications that need to minimize emissions whereas SN6505B has a 420 kHz internal oscillators for applications that require higher efficiency and smaller transformer size. The SN6505x is available in a small 6-pin SOT23/DBV package. The device operation is characterized for a temperature range from –55°C to 125°C.

The SN6505x is a low-noise, low-EMI push-pull transformer driver, specifically designed for small form factor, isolated power supplies. It drives low-profile, center-tapped transformers from a 2.25 V to 5 V DC power supply. Ultra-low noise and EMI are achieved by slew rate control of the output switch voltage and through Spread Spectrum Clocking (SSC). The SN6505x consists of an oscillator followed by a gate drive circuit that provides the complementary output signals to drive ground-referenced N-channel power switches. The device includes two 1-A Power-MOSFET switches to ensure start-up under heavy loads. The switching clock can also be provided externally for accurate placement of switcher harmonics, or when operating with multiple transformer drivers. The internal protection features include a 1.7 A current limiting, under-voltage lockout, thermal shutdown, and break-before-make circuitry. SN6505x include s a soft-start feature that prevents high inrush current during power up with large load capacitors. SN6505A has a 160 kHz internal oscillator for applications that need to minimize emissions whereas SN6505B has a 420 kHz internal oscillators for applications that require higher efficiency and smaller transformer size. The SN6505x is available in a small 6-pin SOT23/DBV package. The device operation is characterized for a temperature range from –55°C to 125°C.

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類型 標題 日期
* Data sheet SN6505x Low-Noise 1-A Transformer Drivers for Isolated Power Supplies datasheet (Rev. I) PDF | HTML 2023年 8月 9日
Product overview Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications PDF | HTML 2022年 11月 9日
Application note How to Reduce Emissions in Push-Pull Isolated Power Supplies (Rev. A) PDF | HTML 2021年 10月 5日
Application brief How to Isolate Signal and Power for an RS-485 System (Rev. C) PDF | HTML 2021年 5月 25日
Application brief How to Isolate Signal and Power in Isolated CAN Systems (Rev. C) PDF | HTML 2021年 5月 25日
Application brief How to Isolate Signal and Power for I2C (Rev. B) PDF | HTML 2021年 5月 19日
Application note Isolated CAN Reference Design (Rev. E) 2020年 7月 22日
Application note Signal and Power Isolation with 3.3 V / 5 V Input and 12 V / 15 V Output 2018年 10月 17日
EVM User's guide SN6505A and SN6505B Evaluation Module User's Guide 2015年 12月 10日

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開發板

SN6505AEVM — 用於隔離式電源的 SN6505A 低雜訊 1A 變壓器驅動器評估模組 (160 kHz CLK)

The evaluation module (EVM), featuring the SN6505A transformer driver, also contains a small form-factor transformer, simple rectifier circuit, and voltage regulator that can be used to simulate a complete isolated power-supply system suitable for many applications.
使用指南: PDF
TI.com 無法提供
開發板

SN6507DGQEVM — 適用於低放射、500-mA 推挽式隔離電源供應器的 SN6507 評估模組

SN6507DGQEVM 允許使用者在隔離電源供應器應用中評估 SN6507 推挽式隔離變壓器驅動器的性能和功能。

使用指南: PDF | HTML
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模擬型號

SN6505A IBIS Model

SLLM293.ZIP (11 KB) - IBIS Model
模擬型號

SN6505A PSpice Transient Model (Rev. B)

SLLM302B.ZIP (261 KB) - PSpice Model
計算工具

SLLC470 SN650X-TRANS-PARAMETER-CALC

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變壓器驅動器
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模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

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 (...)
模擬工具

TINA-TI — 基於 SPICE 的類比模擬程式

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 (...)
使用指南: PDF
參考設計

TIDA-010065 — 基於高效、低排放、隔離式 DC/DC 轉換器的類比輸入模組參考設計

此參考設計為一簡化架構,可產生隔離式電源供應,適用於測量隔離電壓與電流的隔離式放大器。具 5-V 輸入之強化隔離操作的完全整合式 DC/DC 轉換器,並具備可設定 5-V 或 5.4-V 輸出 (適用於低壓降穩壓器 (LDO) 的空餘空間) 可產生隔離電源。連接到 ±50-mV 輸入範圍隔離放大器,且配置爲通道隔離輸入的分流,可測量電流。連接到 ±250-mV 或 ±12-V 輸入範圍隔離放大器,且配置爲群組隔離輸入的潛在分頻器,可測量電壓。隔離放大器介面直接輸出至 24 位 Δ Σ 類比轉數位轉換器 (ADC),或使用增益放大器擴展至 (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-01590 — 適用於太陽能匯流箱的 1200V 隔離式 I2C 高壓側電流感測參考設計

This reference design is an isolated high-side current sensing design for a smart combiner box in a grounded or ungrounded system. The current sensing topology enables multichannel, sub ±1% error, isolated current sensing for high-voltage systems up to 1200-VDC, limited by the DC/DC (...)
Design guide: PDF
電路圖: PDF
參考設計

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Design guide: PDF
電路圖: PDF
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