SN6501 Transformer Driver for Isolated ... - Texas …

1 SN6501 . SN6501 . SLLSEA0I FEBRUARY 2012 REVISED JANUARY 2021. SLLSEA0I FEBRUARY 2012 REVISED JANUARY 2021. SN6501 Transformer Driver for Isolated power Supplies 1 Features 3 Description Push-pull Driver for small transformers The SN6501 is a monolithic oscillator/ power - Driver , Single or 5-V supply specifically designed for small form factor, Isolated High primary-side current drive: power supplies in Isolated interface applications. The 5-V Supply: 350 mA (Max) device drives a low-profile, center-tapped Transformer primary from a or 5-V DC power supply. The Supply: 150 mA (Max). secondary can be wound to provide any Isolated Low ripple on rectified output permits small output voltage based on Transformer turns ratio. capacitors Small 5-Pin SOT-23 Package The SN6501 consists of an oscillator followed by a gate drive circuit that provides the complementary 2 Applications output signals to drive the ground referenced N- Isolated interface power supply for CAN, RS-485, channel power switches.

2 The internal logic ensures RS-422, RS-232, SPI, I2C, Low- power LAN break-before-make action between the two switches. Industrial automation The SN6501 is available in a small SOT-23 (5). Process control package, and is specified for operation at Medical equipment temperatures from 40 C to 125 C. Device Information PART NUMBER(1) PACKAGE BODY SIZE (NOM). SN6501 SOT-23 (5) mm x mm (1) For all available packages, see the orderable addendum at the end of the datasheet. Simplified Schematic Output Voltage and Efficiency vs Output Current An IMPORTANT. Copyright NOTICEI ncorporated 2021 Texas Instruments at the end of this data sheet addresses availability, warranty, changes, use in safety-critical Submit Document applications, Feedback 1. intellectual property matters and other important disclaimers. PRODUCTION DATA. Product Folder Links: SN6501 . SN6501 . SLLSEA0I FEBRUARY 2012 REVISED JANUARY 2021 Table of Contents 1 Feature 2 1 Device Functional 3 8 Application and 15.

3 Revision 2 Application 15. 4 Pin Configuration and Typical 16. 5 5 9 power Supply Absolute Maximum 5 10 Handling Layout 29. Recommended Operating Layout 29. Thermal 11 Device and Documentation Electrical Device Switching 30. Typical 7 Electrostatic Discharge 30. 6 Parameter Measurement 12 30. 7 Detailed 12 Mechanical, Packaging, and Orderable 13 30. Functional Block 13. Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision H (July 2019) to Revision I (January 2021) Page Added a short-circuit protection note to Section .. 16. Removed duplicate equation labeled as (5) in Revision H .. 19. Changes from Revision G (July 2014) to Revision H (July 2019) Page Added Transformer to Recommended Isolation transformers Optimized for SN6501 Table 8-3 Added EPC3668G-LF Transformer to Recommended Isolation transformers Optimized for SN6501 Table 8-3. 21. Added DA2303-AL Transformer to Recommended Isolation transformers Optimized for SN6501 Table 8-3.

4 21. Added DA2304-AL Transformer to Recommended Isolation transformers Optimized for SN6501 Table 8-3. 21. Changes from Revision F (August 2013) to Revision G (July 2014) Page Added Pin Configuration and Functions section, Handling Rating table, Feature Description section, Device Functional Modes, Application and Implementation section, power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .. 1. Changes from Revision E (January 2013) to Revision F (August 2013) Page Added Figure 5-13 and Figure 5-14 ..7. Added Figure 5-17 through Figure 5-18 .. 7. Added Figure 5-23 through Figure 5-24 .. 7. Changed Table 8-3 - Recommended Isolation transformers Optimized for Changes from Revision D (September 2012) to Revision E (January 2013) Page Changed Figure 5-23 ..7. 2 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated Product Folder Links: SN6501 .

5 SN6501 . SLLSEA0I FEBRUARY 2012 REVISED JANUARY 2021. Changes from Revision C (March 2012) to Revision D (September 2012) Page Changed fOSC, Oscillator frequency To: fSW, D1, D2 Switching frequency .. 6. Added graphs Figure 5-3 through Figure 5-4 .. 7. Changed the title of Figure 5-30 From: D1, D2 Oscillator Frequency vs Free-Air Temperature To: D1, D2. Switching Frequency vs Free-Air Added section: Recommended 21. Changed the location and title of Figure 8-7 ..21. Changes from Revision B (March 2012) to Revision C (March 2012) Page Changed the fOSC Oscillator frequency values .. 6. Changed Equation 4 .. 19. Changes from Revision A (March 2012) to Revision B (March 2012) Page Changed Feature From: Small 5-pin DBV Package To: Small 5-pin SOT23 Changed Figure 8-7 21. Changes from Revision * (February 2012) to Revision A (March 2012) Page Changed the device From: Product Preview To: 1. Changed Equation 9 .. 19. Changed Equation 10 .. 19. Changed Table 8-4, From: Wuerth-Elektronik / Midcom To: Wurth Electronics Midcom Changed Figure 8-16.

6 23. Copyright 2021 Texas Instruments Incorporated Submit Document Feedback 3. Product Folder Links: SN6501 . SN6501 . SLLSEA0I FEBRUARY 2012 REVISED JANUARY 2021 4 Pin Configuration and Functions D1 1 5 GND. VCC 2. D2 3 4 GND. Figure 4-1. 5-Pin SOT-23 DBV Package Top View Table 4-1. Pin Functions PIN. DESCRIPTION. NAME NUMBER TYPE. D1 1 OD Open Drain output 1. Connect this pin to one end of the Transformer primary side. Supply voltage input. Connect this pin to the center-tap of the Transformer primary side. Buffer this VCC 2 P. voltage with a 1 F to 10 F ceramic capacitor. D2 3 OD Open Drain output 2. Connect this pin to the other end of the Transformer primary side. GND 4,5 P Device ground. Connect this pin to board ground. 4 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated Product Folder Links: SN6501 . SN6501 . SLLSEA0I FEBRUARY 2012 REVISED JANUARY 2021. 5 Specifications Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)(1).

7 MIN MAX UNIT. VCC Supply voltage 6 V. VD1, VD2 Output switch voltage 14 V. ID1P, ID2P Peak output switch current 500 mA. PTOT Continuous power dissipation 250 mW. TJ Junction temperature 170 C. (1) Stresses beyond those listed under Absolute Maximum Ratings cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under Section is not implied. Exposure to absolute-maximum-rated conditions for extended periods affects device reliability. Handling Ratings MIN MAX UNIT. Tstg Storage temperature range 65 150 C. Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all 4. 4. pins(1). kV. V(ESD) Electrostatic discharge Charged device model (CDM), per JEDEC specification JESD22-C101, all pins(2). Machine Model JEDEC JESD22-A115-A 200 200 V. (1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. (2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

8 Copyright 2021 Texas Instruments Incorporated Submit Document Feedback 5. Product Folder Links: SN6501 . SN6501 . SLLSEA0I FEBRUARY 2012 REVISED JANUARY 2021 Recommended Operating Conditions MIN TYP MAX UNIT. VCC Supply voltage 3 V. VCC = 5 V 10%, When connected to Transformer with 0 11. VD1, VD2 Output switch voltage V. VCC = V 10% primary winding Center-tapped 0 VD1, VD2 Swing V, VCC = 5 V 10% see Figure 5-32 for typical 350. D1 and D2 output switch characteristics ID1, ID2 mA. current Primary-side VD1, VD2 Swing V, VCC = V 10% see Figure 5-31 for typical 150. characteristics TA Ambient temperature 40 125 C. Thermal Information SN6501 . THERMAL METRIC UNIT. DBV 5-PINS. JA Junction-to-ambient thermal resistance JCtop Junction-to-case (top) thermal resistance JB Junction-to-board thermal resistance C/W. JT Junction-to-top characterization parameter JB Junction-to-board characterization parameter JCbot Junction-to-case (bottom) thermal resistance N/A. Electrical Characteristics over full-range of recommended operating conditions, unless otherwise noted PARAMETER TEST CONDITIONS MIN TYP MAX UNIT.

9 VCC = V 10%, See Figure 6-4 1 3. RON Switch-on resistance . VCC = 5 V 10%, See Figure 6-4 2. VCC = V 10%, no load 150 400. ICC Average supply current(1) A. VCC = 5 V 10%, no load 300 700. fST Startup frequency VCC = V, See Figure 6-4 300 kHz VCC = V 10%, See Figure 6-4 250 360 550. fSW D1, D2 Switching frequency kHz VCC = 5 V 10%, See Figure 6-4 300 410 620. (1) Average supply current is the current used by SN6501 only. It does not include load current. Switching Characteristics over operating free-air temperature range (unless otherwise noted). PARAMETER TEST CONDITIONS MIN TYP MAX UNIT. tr-D D1, D2 output rise time VCC = V 10%, See Figure 6-4 70 ns VCC = 5 V 10%, See Figure 6-4 80. tf-D D1, D2 output fall time VCC = V 10%, See Figure 6-4 110 ns VCC = 5 V 10%, See Figure 6-4 60. tBBM Break-before-make time VCC = V 10%, See Figure 6-4 150 ns VCC = 5 V 10%, See Figure 6-4 50. 6 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated Product Folder Links: SN6501 .

10 SN6501 . SLLSEA0I FEBRUARY 2012 REVISED JANUARY 2021. Typical Characteristics TP1 Curves are measured with the Circuit in Figure 6-1; whereas, TP1 and TP2 Curves are measured with Circuit in Figure 6-3 (TA = 25 C unless otherwise noted). See Table 8-3 for Transformer Specifications. 90. 80 TP1. 5. 70. 4. Efficiency - %. 60. TP1. VOUT - V. 50. 3. 40. 2 30. T1 = 760390011 ( ) 20. 1. VIN = , VOUT = T1 = 760390011 ( ). 10. VIN = , VOUT = 0 0. 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100. ILOAD - mA ILOAD - mA. Figure 5-1. Output Voltage vs Load Current Figure 5-2. Efficiency vs Load Current 6 90. TP1. 80. 5. 70 TP1. Efficiency - %. 4 60. VOUT - V. 50. 3. 40. 2 30. T1 = 760390012 ( ) 20. 1. VIN = 5V, VOUT = 5V T1 = 760390012 ( ). 10. VIN = 5V, VOUT = 5V. 0 0. 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100. ILOAD - mA ILOAD - mA. Figure 5-3. Output Voltage vs. Load Current Figure 5-4. Efficiency vs Load Current 6 90.