ISL97673 datasheet(2/28 Pages) RENESAS

2 / 28 page

ISL97673

FN7633 Rev.3.00

Page 2 of 28

Sep 19, 2017

Table of Contents

Block Diagram ................................................ 3

Ordering Information..........................................4

Pin Configuration............................................ 4

Pin Descriptions ............................................. 4

Absolute Maximum Ratings ............................ 5

Thermal Information ...................................... 5

Operating Conditions...................................... 5

Electrical Specifications ......................................6

Typical Performance Curves ........................... 9

Theory of Operation........................................ 12

PWM Boost Converter .....................................12

Enable and PWM ............................................12

OVP and VOUT Requirement .............................12

Current Matching and Current Accuracy ............12

Dynamic Headroom Control .............................12

Operating Modes............................................12

Dimming Controls ..........................................13

PWM Dimming Frequency Adjustment ...............14

Switching Frequency.......................................15

5V Low Dropout Regulator...............................15

In-rush Control and Soft-start..........................15

Fault Protection and Monitoring ........................15

Short Circuit Protection (SCP) ..........................15

Open Circuit Protection (OCP) ..........................16

Overvoltage Protection (OVP) ..........................16

Undervoltage Lockout .....................................16

Input Overcurrent Protection ...........................16

Over-Temperature Protection (OTP)..................16

Write Byte ........................................................19

Read Byte.........................................................19

Slave Device Address .........................................19

SMBus/I2C Register Definitions ........................19

PWM Brightness Control Register (0x00) ...........21

Device Control Register (0x01) ........................21

Fault/Status Register (0x02)............................22

Si Revision Register (0x03) .............................22

DC Brightness Control Register (0x07) ..............23

Configuration Register (0x08) ..........................23

Output Channel Select and Fault Readout Register

(0x09) .............................................................24

Phase Shift Control Register (0x0A) ..................25

Components Selections ...................................25

Input Capacitor ............................................. 25

Inductor ....................................................... 26

Output Capacitors.......................................... 26

Output Ripple................................................ 26

Schottky Diode.............................................. 26

Applications ....................................................26

High Current Applications ............................... 26

Multiple Drivers Operation .............................. 27

Revision History ..............................................28

About Intersil..................................................28

Package Outline Drawing ................................ 29

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