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SN6507 Datasheet(PDF) 3 Page - Texas Instruments |
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SN6507 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 44 page  5 Pin Configuration and Functions 6 7 9 10 4 3 2 1 5 8 EN/UVLO VCC GND SW1 DC CLK SS/ILIM GND SW2 SR DGQ PACKAGE (TOP VIEW) Thermal Pad (11) Figure 5-1. DGQ Package, 10-Pin HVSSOP (Top View) Table 5-1. Pin Functions PIN DESCRIPTION NAME NO. TYPE(1) SW1 1 O Open 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. GND 2 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. VCC 3 P The 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/UVLO 4 I Enable input and undervoltage lockout (UVLO) programming pin. • If the pin voltage is above EN_UVLO threshold , the device is enabled and will start switching when VCC is above VCC_UVLO threshold. • If the pin is shorted to VCC, the device 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. DC 5 I Duty 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. SR 6 I Slew 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 device switches at the default slew rate. CLK 7 I This 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 device will switch at its default frequency (1MHz typical). If left floating, the device will stop switching. SS/ILIM 8 I Multifunction 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. GND 9 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. SW2 10 O Open 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. PowerPAD 11 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 www.ti.com SN6507-Q1 SLLSFM1 – SEPTEMBER 2022 Copyright © 2022 Texas Instruments Incorporated Submit Document Feedback 3 Product Folder Links: SN6507-Q1 |
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