DATASHEET ISL97682, ISL97683, ISL97684 FN7689 Rev.2.00 Compact 2-3-4-Ch LED Drivers with Phase Shift Control Sep 19, 2017 The ISL97682, ISL97683, ISL97684 are Intersils highly Features integrated 2-3-4-channel LED drivers that are suitable for ISL97682 - 2 x 100mA Channels medium size TFT-LCD backlights. These parts can drive multiple channels of LEDs from inputs as low as 4V to outputs ISL97683 - 3 x 50mA Channels of up to 45V. They can also operate from inputs as low as 3V to ISL97684 - 4 x 50mA Channels outputs of up to 26.5V in bootstrap configuration (see Figure Input Voltage 4.0V~26.5V with Max V of 45V 26 for 3V operation). OUT Input Voltage 3.0V (see Figure 26)~24V with Max V of 26.5V OUT The ISL97682, ISL97683, ISL97684 feature optional channels phase shift control. This feature is used to minimize the input, PWM Dimming Linearity output ripple characteristics and load transient, which help - PWM Dimming with Adjustable Dimming Frequency with eliminate or reduce the video and audio noise interference Duty Cycle Linear from 0.4% to 100% <30kHz from the backlight driver operation. - Direct PWM Dimming with Duty Cycle Linear from 0.009% to 100% at 200Hz The ISL97682, ISL97683, ISL97684 offer 8-bit PWM dimming for systems that need frequency tuning flexibility. With the Current Matching of 0.7% typical from 1%~100% Dimming unique adaptive boost switching architecture, the ISL97682, Selectable 600kHz or 1MHz Switching Frequency in PWM/PFM ISL97683, ISL97684 also offer Direct PWM dimming with Mode output, which follows input and achieves linearity as low as 0.009% at 200Hz or 1.35% at 30kHz. Dynamic Headroom Control The drivers incorporate dynamic headroom control that monitors Fault Protection the highest LED forward voltage string and uses its feedback -String Open/Short Circuit Protections, OVP, OTP signal for the minimum output regulation. The ISL97682, Thin and Compact TQFN-16 3mmx3mm Package ISL97683, ISL97684 incorporate extensive fault protection functions including string open and short circuit detections, OVP, Applications and OTP. The switching frequency can be selected at either 600kHz or 1.0MHz in PFM or PWM mode. These parts are Tablet to Notebook PC Displays LED Backlighting available in the thin and compact 16 Ld 3mmx3mm TQFN PMP LED Backlighting package and operate in ambient temperature from -40C to +85C. Related Literature For a full list of related documents, visit our website - ISL97682, ISL97683, ISL97684 product page L1 L1 D1 45V, 4 x 50mA* V = 4~26.5V IN D1 45V, 4 x 50mA* V = 4~26.5V IN Ci 10H Ci 10H Co Co 10F 4.7F 10F 4.7F 7 VIN 7 VIN LX 9 LX 9 0.1F 11 VDC 11 0.1F VDC ISL97684 ISL97684 1F 1F OVP 12 OVP12 EN 6 6 EN PWMI 5 PWMI 5 RSET 3 PGND 10 PGND 3 RSET 10 8 FPWM/DIRECTPWM 8 FPWM/DIRECTPWM CH1 13 CH1 13 CH2 14 CH2 4 14 FSW 4 FSW CH3 15 15 CH3 2 COMP 2 COMP CH4 16 CH4 16 10k 10k 33pF 33pF 8.2nF 8.2nF 1 AGND AGND 1 > = 9V AND WITH *VIN *V >=9V AND WITH IN GOOD LEDS MATCHING GOOD LEDS MATCHING FIGURE 1A. DIRECT PWM DIMMING FIGURE 1B. PWM DIMMING WITH DIMMING FREQUENCY ADJUSTMENT USING R FPWM FIGURE 1. ISL97684 TYPICAL APPLICATION DIAGRAMS FN7689 Rev.2.00 Page 1 of 18 Sep 19, 2017ISL97682, ISL97683, ISL97684 Block Diagram OUTPUT = 45V, 4 X 50mA* V = 4~26.5V IN 10H/1.5A OPTIONAL FUSE 4.7F/50V LX VIN EN INTERNAL ISL97684 OVP OVP REG BIAS O/P SHORT VDC FET OSC & DRIVER RAMP == 0 LOGIC COMP ILIMIT IMAX PGND FSW PHASE FSW SELECT DETECT PE OPEN CKT, SHORT CKT DETECTS COMP GM 8-BIT HIGHEST CH1 AMP DYNAMIC VF DAC HEADROOM STRING CH4 CONTROL DETECT VSET + 1 - + - REF RSET REF OVP GEN REF VSC AGND TEMP SENSOR PHASE SELECT *V >= 9V AND WITH IN GOOD LEDS MATCHING PHASE SHIFT 8-BIT PWMI & PWM DIGITIZER + 4 FPWM/ CONTROLLER - DIRECTPWM DIRECTPWM DETECT FIGURE 2. ISL97684 BLOCK DIAGRAM Ordering Information PART NUMBER TEMP RANGE PACKAGE PKG. (Notes 1, 2, 3)PART MARKING (C) (RoHS Compliant) DWG. ISL97682IRTZ 7682 -40 to +85 16 LD 3x3 TQFN L16.3x3D ISL97683IRTZ 7683 -40 to +85 16 LD 3x3 TQFN L16.3x3D ISL97684IRTZ 7684 -40 to +85 16 LD 3x3 TQFN L16.3x3D ISL97682IRTZEVALZ Evaluation Board ISL97683IRTZEVAL Evaluation Board ISL97684IRTZEVALZ Evaluation Board NOTES: 1. Add -T suffix for 6k unit or -TK suffix for 1k unit tape and reel options. Refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), see the product information page for ISL97682, ISL97683, ISL97684. For more information on MSL, see TB363. FN7689 Rev.2.00 Page 2 of 18 Sep 19, 2017