Brightness Control with a Digital PWM Signal ..................... 11 LED Brightness Control Using a PWM Signal Applied to
VPWM ............................................................................................. 13 LED Brightness Control Using a DC Voltage Applied to
VBRIGHT .......................................................................................... 13 Applications ..................................................................................... 14 Layout Considerations and Noise ............................................ 14 White LED Shorting .................................................................. 14 Driving Fewer than Six LEDs ................................................... 14 Driving Flash LEDs .................................................................... 15 Driving Camera Light, Main, and Sub LEDs.......................... 15 Driving Four Backlight White LEDs and Flash LEDs ........... 16 Power Efficiency ......................................................................... 17 Outline Dimensions ....................................................................... 18 Ordering Guide .......................................................................... 18
TABLE OF CONTENTS
Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 4 Thermal Characteristics .............................................................. 4 ESD Caution .................................................................................. 4 Pin Configuration and Function Descriptions ............................. 5 Typical Performance Characteristics ............................................. 6 Theory of Operation ...................................................................... 10 Output Current Capability ........................................................ 11 Automatic Gain Control ............................................................ 11 Current Matching ....................................................................... 11
REVISION HISTORY
1/11—Rev. B to Rev. C
Changes to Figure 18 and Figure 19 ................................................ 8 Changes to Ordering Guide ........................................................... 18 4/10—Rev. A to Rev. B
Changes to Figure 2 ........................................................................... 5 Changes to Figure 4 ........................................................................... 6 Changes to Figure 16 to Figure 19 ................................................... 8 Changes to Brightness Control with a digital PWM
Signal Section ................................................................................... 11 Added Exposed Pad Notation to Outline Dimensions .............. 18 Changes to Ordering Guide ........................................................... 18 7/05—Rev. 0 to Rev. A
Changes to Table 3 ............................................................................. 5 Changes to Table 7 ........................................................................... 12 Updated Outline Dimensions ........................................................ 18 Changes to Ordering Guide ........................................................... 18 10/04—Revision 0: Initial Version
Rev. C | Page 2 of 20