SLLSFM0A March   2022  – June 2022 SN6507

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics, SN6507
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Push-Pull Converter
      2. 8.3.2 Core Magnetization
      3. 8.3.3 Duty Cycle Control
      4.      Programmable Switching Frequency
      5. 8.3.4 Spread Spectrum Clocking
      6. 8.3.5 Slew Rate Control
      7. 8.3.6 Protection Features
        1. 8.3.6.1 Over Voltage Protection (OVP)
        2. 8.3.6.2 Over Current and Short Circuit Protection (OCP)
        3. 8.3.6.3 Under Voltage Lock-Out (UVLO)
        4. 8.3.6.4 Thermal Shut Down (TSD)
    4. 8.4 Device Functional Modes
      1. 8.4.1 Start-Up Mode
        1. 8.4.1.1 Soft-Start
      2. 8.4.2 Operation Mode
      3. 8.4.3 Shutdown Mode
      4. 8.4.4 SYNC Mode
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Pin Configuration
        2. 9.2.2.2 LDO Selection
        3. 9.2.2.3 Diode Selection
        4. 9.2.2.4 Capacitor and Inductor Selection
        5. 9.2.2.5 Transformer Selection
          1. 9.2.2.5.1 V-t Product Calculation
          2. 9.2.2.5.2 Turns Ratio Estimate
        6. 9.2.2.6 Low-Emissions Designs
      3. 9.2.3 Application Curves
      4. 9.2.4 System Examples
        1. 9.2.4.1 Higher Output Voltage Designs
        2. 9.2.4.2 Commercially-Available Transformers
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  10. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Community Resources
    4. 10.4 Trademarks
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Pin Configuration and Functions

Figure 5-1 DGQ Package,10-Pin HVSSOP(Top View)
Table 5-1 Pin Functions
PINDESCRIPTION
NAMENO.TYPE(1)
SW11OOpen drain output of the first power MOSFET, switch 1. Typically connected to either of the outer terminals of the center tap transformer. Because large currents flow through these pins, their external traces should be kept short.
GND2

GND

Ground connection of internal control circuits and power MOSFET. Pin 2 and Pin 9 must be shorted on PCB for optimzed emissions and efficiency.
VCC3PThe VCC pin is the main supply pin for the power and analog circuits. Short duration, high-current pulses are produced during the turn on and turn off of the power switches.
EN/UVLO4IEnable input and undervoltage lockout (UVLO) programming pin.
  • If the pin voltage is above EN_UVLO threshold , the part is enabled and will start switching when VCC is above VCC_UVLO threshold.
  • If the pin is shorted to VCC, the part is self-started when VCC is above VCC_UVLO threshold.
  • If the pin is floating, or the pin voltage is below EN_UVLO threshold, the device stops switching.
DC5IDuty cycle control pin to compensate input variation. A resistor on this pin to GND sets the duty cycle. If unused, leave the pin floating, the duty cycle is set to the default value (48%). Duty cyle control is disabled in SYNC mode.
SR6ISlew rate control pin to further optimize emission performance. This pin adjusts slew rate of SW1 and SW2 by connecting a resistor to GND. If the pin is left floating, the part switches at the default slew rate.
CLK7IThis pin is used to sync the device with an external clock (SYNC mode) or program the switching frequency by connecting the pin to ground through a resistor. If shorted to GND, the part will switch at its default frequency (1MHz typical). If left floating, the part will stop switching.
SS/ILIM8IMultifunction Soft-Start (SS) and Current-Limit (ILIM) input pin.
  • A capacitor to GND is needed to set the output soft-start time and input inrush current.
  • A resistor to GND is needed to protect the device through the programmable current limit.
GND9

GND

Ground connection of internal control circuits and power MOSFET. Pin 2 and Pin 9 must be shorted on PCB for optimized emissions and efficiency.
SW210OOpen drain output of the second power MOSFET, switch 2. Typically connected to either of the outer terminals of the center tap transformer. Because large currents flow through these pins, their external traces should be kept short.
PowerPAD11

GND

GND pins (Pin 2 and Pin 9) must be electrically connected to the power pad (Pin 11) on the printed circuit board for proper operation.
(1) I = input, O = output, P = power, GND = ground