ISL97675 Intersil Corporation, ISL97675 Datasheet - Page 5

• Manufacturer Part Number: ISL97675
• Description: 4-Channel LED Driver
• Manufacturer: Intersil Corporation

Table of Contents
Typical Application Circuit ................................................................................................................... 1
Block Diagram ..................................................................................................................................... 2
Pin Descriptions (I = Input, O = Output, S = Supply) .......................................................................... 3
Absolute Maximum Ratings ................................................................................................................. 6
Thermal Information ........................................................................................................................... 6
Operating Conditions ........................................................................................................................... 6
Electrical Specifications ....................................................................................................................... 6
Typical Performance Curves ................................................................................................................ 9
Theory of Operation........................................................................................................................... 12
Applications....................................................................................................................................... 19
Revision History ................................................................................................................................ 19
Products ............................................................................................................................................ 19
Package Outline Drawing .................................................................................................................. 20
PWM Boost Converter ....................................................................................................................... 12
OVP ............................................................................................................................................... 12
Enable ............................................................................................................................................ 12
Power Sequence .............................................................................................................................. 12
Current Matching and Current Accuracy .............................................................................................. 12
Dynamic Headroom Control ............................................................................................................... 12
Dimming Controls ............................................................................................................................ 12
Maximum DC Current Setting ............................................................................................................ 12
PWM Control.................................................................................................................................... 13
Phase Shift Control........................................................................................................................... 13
PWM Dimming Frequency Adjustment ................................................................................................. 14
Direct PWM Dimming ........................................................................................................................ 14
Switching Frequency......................................................................................................................... 14
Inrush Control and Soft-Start ............................................................................................................ 14
Fault Protection and Monitoring .......................................................................................................... 15
Short Circuit Protection (SCP) ............................................................................................................ 15
Open Circuit Protection (OCP) ............................................................................................................ 15
Overvoltage Protection (OVP) ............................................................................................................ 15
Undervoltage Lockout ....................................................................................................................... 15
Master Fault Protection ..................................................................................................................... 15
Over-Temperature Protection (OTP).................................................................................................... 15
Components Selections ..................................................................................................................... 17
Input Capacitor................................................................................................................................ 17
Inductor ......................................................................................................................................... 18
Output Capacitors ............................................................................................................................ 18
Channel Capacitor ............................................................................................................................ 18
Output Ripple .................................................................................................................................. 18
Schottky Diode ................................................................................................................................ 18
High Current Applications .................................................................................................................. 19
5
ISL97675
www.DataSheet4U.com
May 19, 2010
FN7630.0