4-Channel Integrated LCD Supply

® ISL97650 Data Sheet November 28, 2006 FN9198.3 4-Channel Integrated LCD Supply The ISL97650 represents a high power, integrated LCD supply IC targeted at large panel LCD displays. The ISL97650 integrates a high power, 2.6A boost converter for AVDD generation, an integrated VON charge pump, a VOFF charge pump driver, VON slicing circuitry and a buck regulator with 2A switch for logic generation. The ISL97650 has been designed for ease of layout and low BOM cost. Supply sequencing is integrated for both AVDD -> VOFF -> VON and AVDD/VOFF -> VON sequences. The TFT power sequence uses a separate enable to the logic buck regulator for maximum flexibility. Peak efficiencies are >90% for both the boost and buck while operating from a 4V to 14V input supply. The current mode buck offers superior line and load regulation. Available in the 36 Ld QFN package, the ISL97650 is specified for ambient operation over the -40°C to +105°C temperature range. Features • 4V to 14V input supply • AVDD boost up to 20V, with integrated 2.8A FET • Integrated VON charge pump, up to 35V out • VOFF charge pump driver, down to -18V • VLOGIC buck down to 1.2V, with integrated 2A FET • Automatic start-up sequencing - AVDD -> VOFF -> VON or AVDD/VOFF -> VON - Independent logic enable • VON slicing • Thermally enhanced 6x6 Thin QFN package • Pb-free plus anneal available (RoHS compliant) Applications • LCD monitors (15”+) • LCD-TVs (up to 40”) Pinout ISL97650 (36 LD TQFN) TOP VIEW 29 CDEL 31 DELB 28 VDC1 36 VDC2 32 CM1 34 FBB 30 ENL 33 VIN 35 EN • Notebook displays (up to 16”) • Industrial/medical LCD displays Ordering Information 27 AGND1 26 PGND1 25 PGND2 24 VINL LX1 1 LX2 2 CB 3 LXL 4 NC 5 VSUP 6 FBL 7 CM2 8 CTL 9 AGND2 10 COM 12 POUT 13 C1- 14 C1+ 15 C2- 16 C2+ 17 DRN 11 NC 18 THERMAL PAD PART NUMBER (Note) PART MARKING TAPE & REEL PACKAGE PKG. (Pb-Free) DWG. # L36.6x6 L36.6x6 ISL97650ARTZ-T ISL97650ARTZ 13” (4k pcs) 36 Ld 6x6 Thin QFN ISL97650ARTZ-TK ISL97650ARTZ 13” (1k pcs) 36 Ld 6x6 Thin QFN 23 NOUT 22 PGND3 21 FBN 20 VREF 19 FBP NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are 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. 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2006. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ISL97650 Absolute Maximum Ratings (TA = +25°C) Maximum Pin Voltages, all pins except below . . . . . . . . . . . . . . 6.5V LX1, LX2, VSUP, NOUT, DELB, C2- . . . . . . . . . . . . . . . . . . . .24V C1- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14V VIN1, VINL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5V DRN, COM, POUT, C1+, C2+ . . . . . . . . . . . . . . . . . . . . . . . . .36V CB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21V Thermal Information Thermal Resistance θJA (°C/W) θJC (°C/W) 6x6 QFN Package (Notes 1, 2) . . . . . . 30 2.5 Maximum Junction Temperature (Plastic Package) . . . . . . . +150°C Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . +300°C Power Dissipation TA ≤ +25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.3W TA = +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.8W TA = +85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.3W TA = +100°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.8W Recommended Operating Conditions Input Voltage Range, VIN . . . . . . . . . . . . . . . . . . . . . . . . 4V to 14V Boost Output Voltage Range, AVDD . . . . . . . . . . . . . . . . . . . . +20V VON Output Range, VON . . . . . . . . . . . . . . . . . . . . . . +15V to +32V VOFF Output Range, VOFF . . . . . . . . . . . . . . . . . . . . . . . -15V to -5V Logic Output Voltage Range, VLOGIC . . . . . . . . . . . . +1.5V to +3.3V Input Capacitance, CIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2x10µF Boost Inductor, L1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3µH-10µH Output Capacitance, COUT . . . . . . . . . . . . . . . . . . . . . . . . . . 2x22µF Buck Inductor, L2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3µH-10µH Operating Ambient Temperature Range . . . . . . . . -40°C to +105°C Operating Junction Temperature . . . . . . . . . . . . . . -40°C to +125°C CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. +150°C max junction temperature is intended for short periods of time to prevent shortening the lifetime. Operation close to +150°C junction may trigger the shutdown of the device even before +150°C, since this number is specified as typical. NOTES: 1. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech Brief TB379. 2. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside. Electrical Specifications PARAMETER SUPPLY PINS VIN VINL VSUP IVIN VIN = 12V, VBOOST = VSUP = 15V, VON = 25V, VOFF = -8V, over temperature from -40°C to +105°C, unless otherwise stated. DESCRIPTION CONDITIONS MIN TYP MAX UNIT Supply Voltage (VIN1) Logic Supply Voltage Charge Pumps and VON Slice Positive Supply Quiescent Current into VIN Enabled, No switching Disabled 4 4 4 12 12 14 14 20 V V V mA µA mA µA mA µA V V 3 25 0.25 1 5 50 2 25 1 IINL Logic Supply Current Enabled, No switching Disabled ISUP VSUP Supply Current Enabled, No Switching and VPout = VSUP Disabled 1 3.85 3.3 1.18 1.177 3.45 1.205 1.205 1200 10 4 VLOR VLOF VREF Undervoltage Lockout Threshold Undervoltage Lockout Threshold Reference Voltage VDC rising VDC falling TA = +25°C 1.225 1.228 1380 V V kHz FOSC AVDD BOOST DMIN DMAX Oscillator Frequency 1020 Minimum Duty Cycle Maximum Duty Cycle 84 20 25 % % 2 FN9198.3 November 28, 2006 ISL97650 Electrical Specifications PARAMETER VBOOST IBOOST EFFBOOST rDS(ON) ΔVBOOST/ΔVIN ΔVBOOST/ΔIOUT VFBB VIN = 12V, VBOOST = VSUP = 15V, VON = 25V, VOFF = -8V, over temperature from -40°C to +105°C, unless otherwise stated. (Continued) DESCRIPTION Boost Output Range Boost Switch Current Peak Efficiency Switch On Resistance Line Regulation Load Regulation Boost Feedback Voltage 5V < VIN < 13V 100mA < Iload < 200mA TA = +25°C 1.192 1.188 ACCBOOST tss VLOGIC BUCK VBUCK IBUCK EFFBUCK RDS-ONBK ΔVBUCK/ΔVIN ΔVBUCK/ΔIOUT VFBL Buck Output Voltage Buck Switch Current Peak Efficiency Switch On Resistance Line Regulation Load Regulation FBL Regulation Voltage 5V < VIN < 13V 100mA < Iload < 500mA TA = +25°C 1.176 1.174 ACCLOGIC tssL VLOGIC Output Accuracy Soft-Start Period for V(Logic) TA = +25°C C(VREF) = 220nF (Note - no soft-start if EN asserted HIGH before ENB) -2 0.5 Output current = 0.5A Current limit See graphs and component recommendations 1.5 2.0 2.4 92 200 0.1 0.2 1.2 1.2 400 1.0 1 1.224 1.226 2 5.5 2.9 V A % mΩ %/V % V V % ms AVDD Output Accuracy Soft-Start Period for AVDD TA = +25°C CDEL = 220nF -1.5 9.6 Current limit See graphs and component recommendations CONDITIONS MIN 1.25 *VIN 2.6 3.2 90+ 160 0.4 0.1 1.205 1.205 300 1.0 0.5 1.218 1.222 1.5 TYP MAX 20 3.8 UNIT V A % mΩ %/V % V V % ms NEGATIVE (VOFF) CHARGE PUMP VOFF ILoad_NCP_min Ron(NOUT)H Ron(NOUT)L Ipu(NOUT)lim Ipd(NOUT)lim I(NOUT)leak VFBN VOFF Output Voltage Range External Load Driving Capability High-Side Driver ON Resistance at NOUT 2X Charge Pump VSUP > 5V I(NOUT) = +60mA -VSUP +1.4V 30 10 5 60 270 -200 -5 0.173 0.171 ACCN D_NCP_max Rpd(FBN)off VOFF Output Accuracy Max Duty Cycle of the Negative Charge Pump Pull-Down Resistance, Not Active I(FBN) = 500µA 1.5 IOFF = 1mA, TA = +25°C 0 V mA Ω Ω mA Low-Side Driver ON Resistance at NOUT I(NOUT) = -60mA Pull-Up Current Limit in NOUT Pull-Down Current Limit in NOUT Leakage Current in NOUT FBN Regulation Voltage V(NOUT) = 0V to V(SUP)-0.5V V(NOUT) = 0.36V to V(VSUP) V(FBN) < 0 or EN = LOW TA = +25°C -60 5 mA µA V V % % 0.203 0.203 0.233 0.235 +3 -3 50 3.3 5.5 kΩ 3 FN9198.3 November 28, 2006 ISL97650 Electrical Specifications PARAMETER VIN = 12V, VBOOST = VSUP = 15V, VON = 25V, VOFF = -8V, over temperature from -40°C to +105°C, unless otherwise stated. (Continued) DESCRIPTION CONDITIONS MIN TYP MAX UNIT POSITIVE (VON) CHARGE PUMP VON ILoad_PCP_min VON Output Voltage Range External Load Driving Capability 2X or 3X Charge Pump VON = 25V (2X Charge Pump) VON = 34V (3X Charge Pump) Ron(VSUP_SW) Ron(C1/2-)H Ron(C1/2-)L Ipu(VSUP_SW) Ipu(C1/2-) Ipd(C1/2-) I(POUT)leak VFBP ON Resistance of VSUP Input Switch High-Side Driver ON Resistance at C1- and C2Low-Side Driver ON Resistance at C1- and C2Pull-Up Current Limit in VSUP Input Switch Pull-Up Current Limit in C1- and C2Pull-Down Current Limit in C1- and C2Leakage Current in POUT FBP Regulation Voltage I(switch) = +40mA I(C1/2-) = +40mA I(C1/2-) = -40mA V(C2+) = 0V to V(SUP) - 0.4V - V(diode) V(C1/2-) = 0V to V(VSUP) - 0.4V V(C1/2-) = 0.2V to V(VSUP) EN = LOW TA = +25°C -5 1.176 1.172 ACCP D_PCP_max V(diode) ENABLE INP