ISL97675IRZ Intersil, ISL97675IRZ Datasheet - Page 5

• Manufacturer Part Number: ISL97675IRZ
• Description: IC LED DVR PWM CTRL 4CH 20QFN
• Manufacturer: Intersil
• Type: Backlight, White LEDr

Specifications of ISL97675IRZ

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 4
• Internal Driver: Yes
• Type - Primary: Backlight
• Frequency: 600kHz, 1.2MHz
• Voltage - Supply: 4.5 V ~ 26 V
• Voltage - Output: 45V
• Mounting Type: Surface Mount
• Package / Case: 20-VQFN
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 30mA
• Internal Switch(s): Yes
• Efficiency: 92%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
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ISL97675
May 19, 2010
FN7630.0