DATASHEET ISL97692, ISL97693, ISL97694A FN7839 Rev.6.00 Single or Multiple Cell Li-ion Battery Powered 4-Channel and 6-Channel Sep 8, 2017 LED Drivers The ISL97692, ISL97693, ISL97694A are Intersils highly Features integrated 4- and 6-channel LED drivers for display 2.4V minimum input voltage, supports single cell applications backlighting. These parts maximize battery life by featuring only 1mA quiescent current, and by operating down to 2.4V 4 channels, up to 40mA each (ISL97692) or 6 channels, up to input voltage, with no need for higher voltage supplies. 30mA each (ISL97693, ISL97694A) 90% efficient at 6P5S, 3.7V and 20mA (ISL97693, ISL97694A) The ISL97692 has four channels and provides 8-bit PWM dimming with adjustable dimming frequency up to 30kHz. The Low 0.8mA quiescent current ISL97693 has six channels with Direct PWM dimming control. PWM dimming control with internally generated clock The ISL97694A has 6 channels and provides 8-, 10-, or 12-bit - 8-bit resolution with adjustable dimming frequency up to PWM dimming with adjustable dimming frequency up to 2 30kHz (ISL97692, ISL97694A) 30kHz, 7.5kHz, or 1.875kHz, respectively, controlled with I C - 12-bit resolution with adjustable dimming frequency up to or PWM input. 1.875kHz (ISL97694A) The ISL97692 and ISL97694A feature phase shifting that may - Optional automatic channel phase shift (ISL97692, be enabled optionally, providing an optimized phase delay ISL97694A) between channels. In the ISL97692 and ISL97694A, phase - Linear dimming from 0.025%~100% up to 5kHz or shifting can multiply the effective dimming frequency by four 0.4%~100% up to 30kHz (ISL97692, ISL97694A) and six allowing above audio-band PWM dimming with 10-bit Direct PWM dimming with 0.005% minimum duty cycle at dimming resolution. 100Hz The ISL97692, ISL97693, ISL97694A employ adaptive boost 2.5% output current matching architecture, which keeps the headroom voltage as low as possible to maximize battery life while allowing ultra low Adjustable switching frequency from 400kHz to 1.5MHz dimming duty cycle as low as 0.005% at 100Hz dimming Applications frequency in Direct PWM mode. Tablet, Notebook PC and Smart Phone Displays LED The ISL97692, ISL97693, ISL97694A incorporate extensive Backlighting protection functions including string open and short circuit detections, OVP, and OTP. Related Literature The ISL97692 and ISL97693 are offered in the 16 Ld 3x3mm For a full list of related documents, visit our website TQFN package, and a 16 bump 1.7x1.7mm WLCSP for the - ISL97692, ISL97693, ISL97694A product pages ISL97692. The ISL97694A is offered in the 20 Ld 3x4mm TQFN package. All parts operate in the ambient temperature range of -40C to +85C. L1 D1 VOUT: 24.5V, 6 x 20mA VIN: 2.4V~5.5V 10H 4.7F 4.7F 4.7F 10 10 VIN 1F 100pF 470k LX 1 COMP OVP 15nF 23.7k 2.2nF 12k ISL97694A 0.1 ISET 53k PGND AGND 0.01 SDA/PWMI CH1 f : 200Hz SCL PWM CH2 EN 0.001 f : 100Hz CH3 PWM FPWM CH4 291k FSW CH5 0.0001 CH6 0.001 0.01 0.1 1 10 143k INPUT DIMMING DUTY CYCLE (%) FIGURE 1. ISL97694A TYPICAL APPLICATION DIAGRAM FIGURE 2. ULTRA LOW PWM DIMMING LINEARITY FN7839 Rev.6.00 Page 1 of 32 Sep 8, 2017 ILED (mA)ISL97692, ISL97693, ISL97694A Table of Contents Typical Application Circuits . 3 Block Diagrams . 5 Pin Configurations . 8 Pin Descriptions . 9 Ordering Information . 10 Absolute Maximum Ratings 11 Thermal Information 11 Recommended Operating Conditions . 11 Electrical Specifications 11 Typical Performance Curves . 14 Theory of Operation . 16 PWM Boost Converter 16 Enable . 16 Dimming Controls . 16 Direct PWM Dimming 16 Phase Shift Control 16 PWM Dimming Frequency Adjustment (ISL97692, ISL97694A) 17 Current Matching and Current Accuracy . 18 Dynamic Headroom Control . 18 Soft-Start and Power ON 18 Power-OFF Sequence 18 Operation with Input Voltage Greater than 5.5V .18 2 SMBus/I C Communications .19 Write Byte 19 Read Byte 19 Slave Device Address 19 2 SMBus/I C Register Definitions . 20 Component Selection . 21 Input Capacitor 21 Overvoltage Protection (OVP) 21 Boost Output Voltage Range 21 Switching Frequency . 22 Inductor 22 Output Capacitor 22 Schottky Diode 22 Compensation 22 Applications . 22 Unused LED Channels 22 Dimming Mode Setting . 22 High Current Applications . 22 PCB Layout Considerations 23 PCB Layout with TQFN and WLCSP Package . 23 General Power PAD Design Considerations .23 PCB Layout 24 Fault Protection and Monitoring 26 Short Circuit Protection (SCP) . 26 Open Circuit Protection (OCP) . 26 Overvoltage Protection (OVP) 26 Undervoltage Lockout 26 Over-Temperature Protection (OTP) 26 Revision History 28 About Intersil 29 Package Outline Drawing 30 FN7839 Rev.6.00 Page 2 of 32 Sep 8, 2017