ISL97673IRZ-TK Intersil, ISL97673IRZ-TK Datasheet - Page 4

• Manufacturer Part Number: ISL97673IRZ-TK
• Description: IC LED DVR PWM CTRL 6CH 20QFN
• Manufacturer: Intersil

Specifications of ISL97673IRZ-TK

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 6
• Internal Driver: Yes
• Type - Primary: Automotive, Backlight
• Type - Secondary: RGB, White LED
• Frequency: 600kHz, 1.2MHz
• Voltage - Supply: 4.5 V ~ 26.5 V
• Voltage - Output: *
• Mounting Type: Surface Mount
• Package / Case: 20-VFQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 40mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table of Contents
Typical Application Circuit ................................. 1
Block Diagram ................................................... 2
Pin Descriptions ................................................ 3
Absolute Maximum Ratings . . . . . . . . . . . . . . . . 5
Thermal Information . . . . . . . . . . . . . . . . . . . . . 5
Operating Conditions . . . . . . . . . . . . . . . . . . . . . 5
Electrical Specifications . . . . . . . . . . . . . . . . . . . 5
Typical Performance Curves .............................. 8
Theory of Operation......................................... 11
PWM Boost Converter ...................................... 11
Enable and PWM ............................................. 11
OVP and V
Current Matching and Current Accuracy ............. 11
Dynamic Headroom Control .............................. 11
Operating Modes ............................................. 11
Dimming Controls ........................................... 12
PWM Dimming Frequency Adjustment ................ 13
Switching Frequency........................................14
5V Low Dropout Regulator................................ 14
In-rush Control and Soft-start........................... 14
Fault Protection and Monitoring ......................... 14
Short Circuit Protection (SCP) ........................... 14
Open Circuit Protection (OCP) ........................... 15
Maximum DC Current Setting . . . . . . . . . . . . . . . . . . 12
DC Current Adjustment . . . . . . . . . . . . . . . . . . . . . . . 12
PWM Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Phase Shift Control . . . . . . . . . . . . . . . . . . . . . . . . . . 13
OUT
Requirement .............................. 11
4
ISL97673
Components Selections ................................... 24
Applications .................................................... 25
Revision History .............................................. 26
Products.......................................................... 26
Package Outline Drawing ................................ 27
Overvoltage Protection (OVP) ........................... 15
Undervoltage Lockout ..................................... 15
Input Overcurrent Protection............................ 15
Over-Temperature Protection (OTP) .................. 15
Write Byte ......................................................... 18
Read Byte ......................................................... 18
Slave Device Address.......................................... 18
SMBus/I2C Register Definitions ........................ 18
PWM Brightness Control Register (0x00)............ 20
Device Control Register (0x01)......................... 20
Fault/Status Register (0x02) ............................ 21
Si Revision Register (0x03) .............................. 21
DC Brightness Control Register (0x07) .............. 22
Configuration Register (0x08) .......................... 22
Output Channel Select and Fault Readout
Phase Shift Control Register (0x0A) .................. 24
Input Capacitor .............................................. 24
Inductor ........................................................ 24
Output Capacitors........................................... 25
Output Ripple................................................. 25
Schottky Diode............................................... 25
High Current Applications ................................ 25
Multiple Drivers Operation ............................... 26
Register (0x09) ............................................ 23
June 24, 2010
FN7633.0