SNVS551E April   2008  – May 2016 LM2758

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 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 Charge Pump and Gain Transitions
      2. 7.3.2 Soft Start
      3. 7.3.3 Current Limit Protection
      4. 7.3.4 Flash Time-out Feature
      5. 7.3.5 Setting LED Currents
      6. 7.3.6 Analog Brightness Control
      7. 7.3.7 Thermal Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Modes
      2. 7.4.2 Logic Control Pins
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Capacitor Selection
        2. 8.2.2.2 Power Efficiency
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
    1. 9.1 Power Dissipation
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 DSBGA Package Assembly and Use
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 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

YZR Package
12-Pin DSBGA
Top View
LM2758 pinout_top.gif
YZR Package
12-Pin DSBGA
Bottom View
LM2758 pinout-bottom.gif

Pin Functions

PIN TYPE DESCRIPTION
NO. NAME
A1 EN1 Input The EN2 pins is used to select the modes (torch, indicator, flash), as well as to put the part into shutdown mode.
A2 SGND Ground Analog and control ground for charge pump. Connect this pin directly to a low impedance ground plane.
A3 ISET Power LED current programming resistor pin. A resistor connected between this pin, and GND is used to set torch, flash and indicator currents.
B1 C1+ Power Flying capacitor pin — connect a 1-µF ceramic capacitor from C1+ to C1−
B2 CPOUT Output Charge pump regulated output. A 2.2-µF ceramic capacitor is required from CPOUT to GND. Connect flash LED anode to this pin.
B3 EN2 Input The EN1 pin is used to select the modes (torch, indicator, flash), as well as to put the part into Shutdown mode.
C1 VIN Input Supply voltage connection
C2 C2+ Power Flying capacitor pins — connect a 1-µF ceramic capacitor from C2+ to C2−.
C3 LED− Output Regulated current source output. Connect flash LED cathode to this pin.
D1 C2− Power Flying capacitor pin — connect a 1-µF ceramic capacitor from C2+ to C2−.
D2 C1− Power Flying capacitor pin — connect a 1-µF ceramic capacitor from C1+ to C1−
D3 PGND Ground Power ground for the charge pump and the current source. Connected the pin directly to a low-impedance ground plane.