SNVS901A March   2014  – May 2014 TPS92511

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 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Pulse Level Modulation (PLM) Control
      2. 7.3.2  Pulse Level Modulation (PLM) Operaion Principles
      3. 7.3.3  PLM Control enable Common-Anode Low-Side Sensing (CALS)Technique to Save Wiring
      4. 7.3.4  Internal Regulator
      5. 7.3.5  Setting The Switching Frequency
      6. 7.3.6  Setting The LED Current
      7. 7.3.7  Integrated MOSFET
      8. 7.3.8  Inductor Selection
      9. 7.3.9  Integrated MOSFET Current Limit
      10. 7.3.10 PWM Dimming Control
      11. 7.3.11 Analog Dimming
      12. 7.3.12 High Voltage Buck Configuration
      13. 7.3.13 Thermal Foldback
      14. 7.3.14 EMI Consideration
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation with VIN < 4.5 V (minimum VIN)
      2. 7.4.2 Operation with DIM control
      3. 7.4.3 Linear Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 TPS92511 LED driver for 12 LEDs at 0.5A
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
  9. 9 Power Supply Recommendation
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
      1. 10.2.1 Thermal Consideration
  11. 11Device and Documentation Support
    1. 11.1 Trademarks
    2. 11.2 Electrostatic Discharge Caution
    3. 11.3 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

5 Pin Configuration and Functions

DDA (SO THERMAL PAD) PACKAGE
8 PINS
(TOP VIEW)
pinout_dda8_snvs901.gif

Pin Functions

PIN DESCRIPTION
NAME NO.
DIM 6 PWM Dimming Control. Apply logic level PWM signal to this pin dims the LED string. This pin is internally pulled up.
FS 5 Switching Frequency Setting. An external resistor RFS connecting the FS pin to ground programs the switching frequency from 50 kHz to 500 kHz.
GND 4 Analog Signal Ground.
IADJ 3 Average LED Current Setting. An external resistor RIADJ connecting the IADJ pin to ground programs the average LED current.
LX 7 Integrated MOSFET Drain. Internally connected to the drain of the integrated MOSFET. Connect this pin to the output inductor and anode of the Schottky diode.
PGND 2 Power Ground. Must be connected to the GND pin for normal operation. The PGND and GND pins are not internally shorted.
VCC 1 Internal Regulator Output. Typically regulated to 5.4 V. Connect a capacitor of larger than 1 µF between the VCC and GND pins.
VIN 8 Input Voltage. Supply pin to the device. The input voltage range is from 4.5 V to 65 V.
Thermal pad Thermal Connection Pad. Connect to a ground plane for heat dissipation.