March 5, 2009 Datasheet No – PD97381 IRS20957S Protected Digital Audio Driver Features • • • • • • • Product Summary Floating PWM input enables easy half bridge implementation Programmable bidirectional over-current protection with self-reset function Programmable preset dead-time for improved THD performances High noise immunity ±100V ratings deliver up to 500W in output power 3.3 V/ 5 V logic compatible input Operates up to 800kHz Typical Applications • • • • Home theatre systems Mini component stereo systems Powered speaker systems General purpose audio power amplifiers Topology Half-Bridge VOFFSET (max) +/- 100 V IO+ & IO- (typical) 1.0 A & 1.2 A Selectable deadtime 15/25/35/80ns Ton & toff (typical) 95ns & 80ns OC protection delay 500ns (max) Shutdown propagation delay 250ns (max) Package Typical Connection Diagram Note: Please refer to Lead Assignments for correct pin configuration. This diagram shows electrical connections only. www.irf.com © 2008 International Rectifier 1 IRS20957S Table of Contents Page Description 3 Qualification Information 4 Absolute Maximum Ratings 5 Recommended Operating Conditions 6 Electrical Characteristics 7 Functional Block Diagram 9 Input/Output Pin Equivalent Circuit Diagram 10 Lead Definitions 11 Lead Assignments 11 Waveform definitions 12 Application information and additional information 12 Package Details 13 Tape and Reel Details 14 Part Marking Information 15 Ordering Information 16 www.irf.com © 2008 International Rectifier 2 IRS20957S Description The IRS20957S is a high voltage, high speed MOSFET driver with a floating PWM input designed for Class D audio amplifier applications. Bi-directional current sensing detects over current conditions during positive and negative load currents without any external shunt resistors. A built-in protection control block provides a secure protection sequence against over-current conditions and a programmable reset timer. The internal dead-time generation block enables accurate gate switching and optimum dead-time setting for better audio performance, such as lower THD and lower audio noise floor. www.irf.com © 2008 International Rectifier 3 IRS20957S † Qualification Information Qualification Level Moisture Sensitivity Level Machine Model ESD Human Body Model IC Latch-Up Test RoHS Compliant Industrial†† Comments: This family of ICs has passed JEDEC’s Industrial qualification. IR’s Consumer qualification level is granted by extension of the higher Industrial level. MSL2†††260°C SOIC16N (per IPC/JEDEC J-STD-020) Class B (per JEDEC standard EIA/JESD22-A115) Class 2 (per EIA/JEDEC standard JESD22-A114) Class I , Level A (per JESD78) Yes † Qualification standards can be found at International Rectifier’s web site http://www.irf.com/ †† Higher qualification ratings may be available should the user have such requirements. Please contact your International Rectifier sales representative for further information. ††† Higher MSL ratings may be available for the specific package types listed here. Please contact your International Rectifier sales representative for further information. www.irf.com © 2008 International Rectifier 4 IRS20957S Absolute Maximum Ratings Absolute Maximum Ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are absolute voltages referenced to VSS; all currents are defined positive into any lead. The Thermal Resistance and Power Dissipation ratings are measured under board mounted and still air conditions. Symbol VB VS VHO VCSH VCC VLO VDD VSS VIN VCSD VDT VOCSET VREF IDDZ ICCZ IBSZ IOREF d VS /dt d VSS /dt d VSS /dt Pd RthJA TJ TS TL † †† ††† Definition High side floating supply voltage High side floating supply voltage High side floating output voltage CSH pin input voltage Low side fixed supply voltage Low side output voltage Floating input supply voltage Floating input supply voltage PWM input voltage CSD pin input voltage DT pin input voltage OCSET pin input voltage VREF pin voltage † † † Floating input supply zener clamp current † Low side supply zener clamp current † Floating supply zener clamp current Reference output current Allowable VS voltage slew rate Allowable VSS voltage slew rate † †† Allowable VSS voltage slew rate upon power-up Maximum power dissipation Thermal resistance, Junction to ambient Junction Temperature Storage Temperature Lead temperature (Soldering, 10 seconds) ††† Min. -0.3 VB-15 Vs-0.3 Vs-0.3 -0.3 -0.3 -0.3 (See IDDZ) VSS -0.3 VSS -0.3 -0.3 -0.3 -0.3 - Max. 215 VB+0.3 VB+0.3 VB+0.3 20 VCC +0.3 210 VDD+0.3 VDD+0.3 VDD+0.3 VCC +0.3 VCC +0.3 VCC +0.3 10 10 10 5 50 50 Units - 50 V/ms -55 - 1.0 115 150 150 300 W V mA V/ns °C/W °C VDD - VSS, VCC -COM and VB - VS contain internal shunt zener diodes. Please note that the voltage ratings of these can be limited by the clamping current. For the rising and falling edges of step signal of 10V. Vss=15V to 200V. Vss ramps up from 0V to 200V. www.irf.com © 2008 International Rectifier 5 IRS20957S Recommended Operating Conditions For proper operation, the device should be used within the recommended conditions below. The Vs and COM offset ratings are tested with supplies biased at IDD=5mA, VCC=12V and VB-VS=12V. Symbol VB VS IDDZ VSS VHO VCC VLO VIN VCSD VDT IOREF VOCSET TA † †† Definition High side floating supply absolute voltage High side floating supply offset voltage Floating input supply zener clamp current Floating input supply absolute voltage High side floating output voltage Low side fixed supply voltage Low side output voltage PWM input voltage CSD pin input voltage DT pin input voltage Reference output current to COM OCSET pin input voltage Ambient Temperature † Min. Vs+10 † 1 0 Vs 10 0 VSS VSS 0 0.3 0.5 -40 Max. Vs+14 200 5 100 VB 15 VCC VDD VDD VCC 0.8 5 125 Units V mA V mA V °C Logic operational for Vs equal to –5V to +200V. Logic state held for Vs equal to –5V to –VBS. Nominal voltage for VREF is 5V. IOREF of 0.3 – 0.8mA dictates total external resistor value on VREF to be 6.3k to 16.7k Ω. www.irf.com © 2008 International Rectifier 6 IRS20957S Electrical Characteristics VCC,VBS= 12 V, IDD=5mA, VSS=20V, VS=0V,CL=1nF and TA=25°C unless otherwise specified. Symbol Description Low Side Supply VCC supply UVLO positive UVCC+ threshold VCC supply UVLO negative UVCCthreshold IQCC Low side quiescent current Low side zener diode clamp VCLAMPL voltage High Side Floating Supply High side well UVLO positive UVBS+ threshold High side well UVLO negative UVBSthreshold IQBS High side quiescent current High to Low side leakage ILKH current High side zener diode clamp VCLAMPH voltage Floating Input Supply VDD, VSS floating supply UVDD+ UVLO positive threshold VDD, VSS floating supply UVDDUVLO negative threshold Floating Input quiescent IQDD current Floating Input zener diode VCLAMPM clamp voltage Floating input side to Low side ILKM leakage current Floating PWM Input Logic high input threshold VIH voltage Logic low input threshold VIL voltage IIN+ Logic “1” input bias current IINLogic “0” input bias current Protection VREF Reference output voltage Low side OC threshold in Vs VthOCL VthOCH Vth1 Vth2 ICSD+ ICSD- High side OC threshold in VCSH CSD pin shutdown release threshold CSD pin self reset threshold CSD pin discharge current CSD pin charge current Min Typ Max Units Test Conditions 8.4 8.9 9.4 8.2 8.7 9.2 - - 3 mA VDT = VCC 19.6 20.4 21.6 V ICC=5mA 8.0 8.5 9.0 7.8 8.3 8.8 - - 1 mA - - 50 µA VB=VS =200V 14.7 15.3 16.2 V IBS=5mA 8.2 8.7 9.2 V V V VSS =0V VSS =0V 7.7 8.2 8.7 - - 1 mA VDD=9.5V +Vss 9.8 10.2 10.8 V IDD=5mA - - 50 µA VDD=VSS =200V 2.3 1.9 - - 1.9 1.5 - - 40 1 4.8 5.1 5.4 1.1 1.2 1.3 1.1+ Vs 1.2+ Vs 1.3+ Vs V µA V VIN =3.3V VIN = VSS IOREF =0.5mA OCSET=1.2V, Figure 3 Vs=200V, Figure 4 0.62xVDD 0.70xVDD 0.78xVDD VSS =0V 0.26xVDD 0.30xVDD 0.34xVDD VSS =0V VSD = VSS +5V VSD = VSS +5V 70 70 www.irf.com 100 100 130 130 µA © 2008 International Rectifier 7 IRS20957S Protection (continued) Symbol Description Shutdown propagation delay tSD from VCSD > VSS + VthOCH to Shutdown Propagation delay time from tOCH VCSH > VthOCH to Shutdown Propagation delay time from tOCL Vs> VthOCL to Shutdown Gate Driver Output high short circuit Io+ current (Source) Output low short circuit Iocurrent (Sink) Low level out put voltage VOL LO – COM, HO – VS High level out put voltage VOH VCC – LO, VB – HO tr Turn-on rise time tf Turn-off fall time High and low side turn-on Ton_1 propagation delay, floating inputs High and low side turn-off Toff_1 propagation delay, floating inputs High and low side turn-on Ton_2 propagation delay, nonfloating inputs High and low side turn-off Toff_2 propagation delay, nonfloating inputs Deadtime: LO turn-off to HO DT1 turn-on (DTLO-HO) & HO turnoff to LO turn-on (DTHO-LO) Deadtime: LO turn-off to HO DT2 turn-on (DTLO-HO) & HO turnoff to LO turn-on (DTHO-LO) Deadtime: LO turn-off to HO DT3 turn-on (DTLO-HO) & HO turnoff to LO turn-on (DTHO-LO) Deadtime: LO turn-off to HO turn-on (DTLO-HO) & HO turnDT4 off to LO turn-on (DTHOLO)VDT= VDT4 VDT1 DT mode select threshold 1 VDT2 DT mode select threshold 2 VDT3 DT mode select threshold 3 Min Typ Max - - 250 - - 500 - - 500 - 1.0 - - 1.2 - - - 0.1 Units Test Conditions Figure 2 ns Figure 4 Figure 3 A Vo=0V, PW<10µS Vo=12V, PW<10µS Io=0A V - - 1.4 - 15 10 - - 95 - - 80 - - 95 - - 80 - 8 15 22 VDT>VDT1, VSS = COM 15 25 35 VDT1>VDT> VDT2, VSS = COM 20 35 50 VDT2>VDT> VDT3, VSS = COM 50 80 110 VDT3>VDT, VSS = COM 0.51xVcc 0.57xVcc 0.32xVcc 0.36xVcc 0.21xVcc 0.23xVcc www.irf.com 0.63xVcc 0.40xVcc 0.25xVcc Io=0A ns VDT = VCC, VS = 100V, VSS = 100V VDT = VCC, VS = 100V, VSS = 100V VDT = VCC, VS = 100V, VSS = COM VDT = VCC, VS = 100V, VSS = COM V © 2008 International Rectifier 8 IRS20957S Functional Block Diagram FLOATING INPUT UV DETECT VDD VB UV HIGH SIDE CS INPUT LOGIC Q HO 15.3V IN CSH UV DETECT 10.2V HV LEVEL SHIFT VSS HV LEVEL SHIFT FLOATING HIGH SIDE VS HV LEVEL SHIFT 5V REG VCC UV DETECT CHARGE/ DISCHARGE CSD SD DT 20.4V DEAD-TIME HV LEVEL SHIFT PROTECTION CONTROL LO COM HV LEVEL SHIFT LOW SIDE CS 5.1V REFERENCE OCSET VREF DT www.irf.com © 2008 International Rectifier 9 IRS20957S I/O Pin Equivalent Circuit Diagrams VB ESD Diode HO 15 V Clamp ESD Diode VS 200 V V CC VCC ESD Diode 20 V Clamp LO ESD Diode COM www.irf.com © 2008 International Rectifier 10 IRS20957S Lead Definitions Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol VDD CSD IN VSS NC VREF OCSET DT COM LO VCC NC VS HO VB CSH Description Floating input positive supply Shutdown timing capacitor, referenced to VSS PWM non-inverting input, in phase with HO Floating input supply return 5V reference output for setting OCSET Low side over current threshold setting, referenced to COM Input for programmable dead-time, referenced to COM Low side supply return Low side output Low side logic supply High side floating supply return High side output High side floating supply High side over current sensing input, referenced to VS Lead Assignments 1 16 CSH CSD 2 15 VB IN 3 14 HO VSS 4 13 VS NC 5 12 NC VREF 6 11 VCC OCSET 7 10 LO 8 9 COM DT IRS20957 VDD www.irf.com © 2008 International Rectifier 11 IRS20957S Waveform definitions Vth1 CSD 90% HO/LO tSD Figure 1: Switching Time Waveform Definitions VS Figure 2: CSD to Shutdown Waveform Definitions VthOCH CSH VthOCL VS 90% 90% LO HO tOCL tOCH Figure 3: VS > VthOCL to Shutdown Waveform Figure 4: VCSH > VthOCH to Shutdown Waveform Application information and additional information Please refer to AN-1144 for IRS20957 functional description. www.irf.com © 2008 International Rectifier 12 IRS20957S Package Details: SOIC16N www.irf.com © 2008 International Rectifier 13 IRS20957S Package Details: SOIC16N, Tape and Reel LOADED TAPE FEED DIRECTION A B H D F C NOTE : CONTROLLING DIM ENSION IN M M E G CARRIER TAPE DIMENSION FOR Metric Code Min Max A 7.90 8.10 B 3.90 4.10 C 15.70 16.30 D 7.40 7.60 E 6.40 6.60 F 10.20 10.40 G 1.50 n/a H 1.50 1.60 16SOICN Imperial Min Max 0.311 0.318 0.153 0.161 0.618 0.641 0.291 0.299 0.252 0.260 0.402 0.409 0.059 n/a 0.059 0.062 F D C B A E G H REEL DIMENSIONS FOR 16SOICN Metric Imperial Code Min Max Min Max A 329.60 330.25 12.976 13.001 B 20.95 21.45 0.824 0.844 C 12.80 13.20 0.503 0.519 D 1.95 2.45 0.767 0.096 E 98.00 102.00 3.858 4.015 F n/a 22.40 n/a 0.881 G 18.50 21.10 0.728 0.830 H 16.40 18.40 0.645 0.724 www.irf.com © 2008 International Rectifier 14 IRS20957S Part Marking Information Part number IRSxxxxx Date code YWW ? IR logo Pin 1 Identifier ? MARKING CODE P Lead Free Released ? XXXX Lot Code (Prod mode – 4 digit SPN code) Assembly site code Per SCOP 200-002 Non-Lead Free Released www.irf.com © 2008 International Rectifier 15 IRS20957S Ordering Information Standard Pack Base Part Number IRS20957S Package Type Complete Part Number SOIC16N Form Quantity Tube/Bulk 45 IRS20957SPBF Tape and Reel 2500 IRS20957STRPBF The information provided in this document is believed to be accurate and reliable. However, International Rectifier assumes no responsibility for the consequences of the use of this information. International Rectifier assumes no responsibility for any infringement of patents or of other rights of third parties which may result from the use of this information. No license is granted by implication or otherwise under any patent or patent rights of International Rectifier. The specifications mentioned in this document are subject to change without notice. This document supersedes and replaces all information previously supplied. For technical support, please contact IR’s Technical Assistance Center http://www.irf.com/technical-info/ WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 www.irf.com © 2008 International Rectifier 16