ISL97671IRZ-T Intersil, ISL97671IRZ-T Datasheet - Page 4

• Manufacturer Part Number: ISL97671IRZ-T
• Description: IC LED DVR PWM CTRL 6CH 20QFN
• Manufacturer: Intersil

Specifications of ISL97671IRZ-T

• 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
• 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
• Voltage - Output: -

Table of Contents
Typical Application Circuit ................................. 1
Block Diagram ................................................... 2
Pin Descriptions (I = Input, O = Output,
Absolute Maximum Ratings . . . . . . . . . . . . . . . . 5
Thermal Information . . . . . . . . . . . . . . . . . . . . . 5
Operating Conditions . . . . . . . . . . . . . . . . . . . . . 5
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical Performance Curves .............................. 8
Theory of Operation......................................... 10
S = Supply)..................................................... 3
PWM Boost Converter ...................................... 10
Enable ...........................................................10
OVP and V
Current Matching and Current Accuracy ............. 11
Dynamic Headroom Control .............................. 11
Dimming Controls ........................................... 11
PWM Dimming Frequency Adjustment ................ 12
Phase Shift Control.......................................... 12
Switching Frequency........................................13
5V Low Dropout Regulator................................ 13
In-rush Control and Soft-start........................... 14
Fault Protection and Monitoring ......................... 14
Short Circuit Protection (SCP) ........................... 14
Open Circuit Protection (OCP) ........................... 14
Overvoltage Protection (OVP) ........................... 15
Undervoltage Lock-out ..................................... 15
Maximum DC Current Setting . . . . . . . . . . . . . . . . . . 11
PWM Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
OUT
Requirement .............................. 10
4
ISL97671
Components Selections ................................... 25
Applications .................................................... 26
Revision History .............................................. 27
Products.......................................................... 27
Package Outline Drawing ................................ 28
Input Overcurrent Protection............................ 15
Over-Temperature Protection (OTP) .................. 15
SMBus/I
Write Byte ......................................................... 18
Read Byte ......................................................... 18
Slave Device Address.......................................... 18
SMBus/I
PWM Brightness Control Register (0x00)............ 20
Device Control Register (0x01)......................... 21
Fault/Status Register (0x02) ............................ 22
Identification Register (0x03) ........................... 22
DC Brightness Control Register (0x07) .............. 23
Configuration Register (0x08) .......................... 23
Output Channel Mask/Fault Readout
Phase Shift Control Register (0x0A) .................. 25
Input Capacitor .............................................. 25
Inductor ........................................................ 25
Output Capacitors........................................... 26
Output Ripple................................................. 26
Schottky Diode............................................... 26
High Current Applications ................................ 26
Multiple Drivers Operation ............................... 27
16-Bit Dimming.............................................. 27
Register (0x09) ............................................ 24
2
2
C Communications ................................ 18
C Register Definitions......................... 18
June 24, 2010
FN7631.0