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| Preliminary Data Sheet No. PD60205 IR3221 FULLY PROTECTED H-BRIDGE for DC MOTOR Features * * * * * * * * Over temperature shutdown Over current shutdown nrush current limited by Soft-Start sequence E.S.D protection Sleep mode for direct battery connection Braking / non-braking operation Internal switching oscillator Direct interface for End switches Product Summary Rdson Vcc.op. I cont. ( heat sink ) I shutdown Oper. Freq. 15 m max. 5.5 to 35 V 20.0 A 50 A 20 kHz Description Packages The IR3221 is a Fully Protected Dual High Side Switch I.C. With two additional Low Side switches (IRL1404), the IR3221 drives and controls the whole H bridge topology. It provides shoot-through protection for each leg, H bridge logic control, soft-start sequence and over-current /over-temp. protections. The signals IN1 and IN2 select the operation modes and the PWM Soft-Start sequence cycles the corresponding active low side switch in order to limit the motor inrush curSIP 15 TO220 - IRL1404 rent. By using the recommended part number and the proper cooling, the inner High Side IPS protects the whole H-bridge function. The Soft-Start sequence is programmed by an RC time constant and reset itself automatically. Block Diagram + Bat. VCC Gnd +5V SS IN 1 LS gate 1 IR 3221 M1 M2 LS gate 2 IN 2 Clockwise motion 10 k R D G TO 220 Mosfet D G 10 k Counter clockwise motion TO 220 Mosfet S S 5V C Debouncing RC networks ( e;g 10 nF ) Micro Controller Electrical stop Electrical stop 0V IR3221 Absolute Maximum Ratings Absolute Maximum Ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are referenced to GROUND pin . T Ambient = 25 c unless otherwise specified. Symbol Vm1(2) Vin1 (2) I in1 (2) Vg1 (2) Vss Isd cont. Isd pulsed Esd 1 Esd 2 Pd Tj max. T lead 1 Parameter Maximum M1 (M2) voltage ( active clamp ) Maximum IN 1 (IN 2) voltage Maximum IN1 (IN 2) current Maximum Gate 1 ( Gate 2 ) voltage Maximum SS voltage Diode max. permanent current (Rth=50C/W) Diode max. pulsed current Electrostatic Disch. (human body model)C=100 pF R= 1500 Electrostatic Disch. ( Machine model ) C=200 pF R= 0 Maximum power dissipation (Rth=50C/W) Maximum storage & operating junction temperature Lead temperature ( soldering 10 s ) 1 1 Min. Vcc-37 -0.3 -1 -0.3 -0.3 -40 - Max. Vcc+0.3 5.5 10 7.5 5.5 4 45 4 0.5 2.5 +150 300 Unit V V mA V V A A kV kV W C C Limited by junction temperature ( pulsed current limited also by internal wiring Thermal Characteristics Symbol R th 1 R th 2 Parameter Junction to amb. Thermal resistance Junction to tab Thermal resistance typ 50 1.0 max Unit C/W C/W Recommended Operating Conditions Those values are given for a quick design. For operation outside those conditions, please consult the application note AN 1032 Symbol Vcc Vin1(2) Vin1(2) Iout max. 1 Iout max 2 R in R C R gates 2 Parameter Continuous Vcc voltage High level IN1 (IN 2) input voltage Low level IN1 (IN2) input voltage Output cont. current ( Rthja=50C/w, tamb=85C, Tj=150C ) Output cont. current ( Rthja=5C/w, tamb=105C, Tj=150C ) Recommended resistor in series with IN pin Soft-Start resistor Soft-Start capacitor Recommended gate resistors for Low Side Switches 2 Min. 8 4 -0.3 10 5.0 0.1 0 Max. 28 5.5 0.9 7.7 24 20 390 3.3 50 Unit V V V A A k k F Protections are operating down to 5.5 V 2 www.irf.com IR3221 Static Electrical Characteristics o Tj = 25 C, VCC = 14V unless otherwise specified. Symbol Rds on @ Tj = 25C Rds on @ Tj = 150C Vcc oper. V clamp1 (2) Vf1(2) I M1(2) leakage Icc off Icc on V ih1(2) threshold V il1 (2) threshold I in1(2) Vccuv+ VccuvVss + Vss I ss leakage Parameter ON state resistance Tj = 25 C ON state resistance Tj = 150 C Operating voltage range Vcc to M1 (M2) clamp voltage Body diode 1(2)forward voltage M1 (M2) output leakage current Supply current when off Supply current when on IN1 (IN2) high threshold voltage IN1 (IN2) low threshold voltage ON state IN1 (IN2) positive current Vcc UVLO positive going threshold Vcc UVLO negative going threshold SS high level threshold SS low level threshold SS pin leakage current (sleep mode ) Min. 5.5 37 - Typ. 12 20 40 0.9 10 10 8 2.6 2.0 35 4.5 4.2 4.2 1.2 - Max. 16 35 48 50 50 10 Unit m m V V V A A mA V V A V V V V uA Test Conditions Vin1,2 = 5 V ; Im1,2 = 5 A Vin1,2 = 5 V ; Im1,2 = 5 A Id = 10 mA see Fig. 1 & 2 Id = 5 A ; Vin1,2 = 0 V Vm1,2 = 0 V ; Tj = 25 c Vin1,2 = 0 V, Tj = 25 c Vin1 = 5 V Vin1,2 = 5 V Switching Electrical Characteristics VCC =14V, Resistive Load =2.8, R input = 10k, and Tj = 25oC for each high side switch (unless otherwise specified). Symbol td-on Tr 1 Tr 2 dV/dt ( on ) Eon td-off Tf dV/dt ( off ) Eoff IN1(2) Max. Freq. Soft-Start freq. I g1 (2) Max. Trd Parameter Turn-on delay time Rise time to Vout = Vcc - 5 V Rise time to Vout = 90% of Vcc Turn-ON dV/dt Turn-ON energy Turn-off delay time Fall time to Vout = 10% of Vcc Turn-OFF dV/dt Turn-OFF energy Max. Frequency on IN1 (IN2 ) Soft-Start oscillator frequency Max. Gate 1 ( Gate 2 ) current Min. IN1(2) OFF time to reset SS Min. 15 50 2.0 Typ. 5 4 65 3 3 65 8 5 0.75 500 20 - Max. 30 - Unit S S S V/s mJ S S V/s mJ Hz kHz mA mS Test Conditions see fig. 3 see fig. 3 see fig. 3 see fig. 3 see fig. 4 see fig. 4 see fig. 4 low side driver C=3.0 uF,IN1=IN2 www.irf.com 3 IR3221 Protection Characteristics (High side switch protection) Symbol Tsd Isd T reset Note : Parameter Over-temperature threshold Over-current threshold Minimum time to reset protections Min. 42 Typ. 165 50 300 Max. 60 - Unit C A S Test Conditions see fig. 2 see fig. 2 IN1=IN2 = 0 V The low side switches present sufficient cooling capability in order to have the whole H-bridge function protected by the IR 3221 inner temperature sensor. Truth Table IN1 L L L H H H * IN2 L H H L L H MODES Stand-by with braking - sleep mode ** forward rotation ( normal operation ) forward rotation ( protection triggered ) reverse rotation ( normal operation ) reverse rotation ( protection triggered ) Stand-by without braking HS1 OFF OFF OFF ON OFF OFF LSS1 ON ON* ON* OFF OFF OFF HS2 OFF ON OFF OFF OFF OFF LSS2 ON OFF OFF ON* ON* OFF SS reset ON OFF OFF OFF OFF ON During Soft-Start sequence, the low side part is switching. ** Protections are reset in this mode Block Diagram SS Soft Start duty cycle + S S reset - Oscillator 10 mA Gnd VCC IN 1 VCC H Bridge logic control & status feedback 40 V Active Clamp 40 V Active Clamp IN 2 Shoot-through protection Over current shutdown Over temp. protection Over current shutdown Shoot-through protection G1 Low Side Driver Low Side Driver G2 M1 M2 Gnd 4 www.irf.com IR3221 Lead Definitions Vcc M1 M2 G1 G2 Gnd Positive power supply Motor 1 output ( high side source - leg 1 ) Motor 2 output ( high side source - leg 2 ) Gate 1 drive output ( low side gate - leg 1 ) Gate 2 drive output ( low side gate - leg 2 ) Power supply return IN1 IN2 SS Logic input 1 ( Leg 1 Cdt. / mode ) Logic input 2 ( Leg 2 Cdt. / mode ) RC soft-start input ( the voltage on this input drives the switching duty cycle ) Recommended Low Side Mosfet IRL1404 4.5 m / 40 V - TO 220 packaged Power Mosfet Lead Assignments m1 m1 m1 nc g1 gnd ss Vcc in2 in1 g2 nc m2 m2 m2 GDS SIP 15 IR 3221 Soft-Start Sequence IN1 (IN2) TO 220 IRL1404 SS M1-M2 (M2-M1) Vss+ VssDuty cycle modulation follows SS voltage Tss ( approximately 2 x RC time constant ) Trd t t t www.irf.com 5 IR3221 Permanent Switching Operation (Without external RC time constant) +5V Additional Schottky diodes have to be implemented if the I.C temperature appears too high. A over-voltage protection may be needed depending on the power supply wire length Vcc Micro Controller Additional Schottky diodes In1 In2 ss +Bat Over-voltage protection Direction & Braking Speed IR 3221 DC Motor Gnd Star Connection 0V -Bat Note: SS pin ( through a resistor ) can either drive the PWM duty cycle of the inner 20 kHz oscillator or force the switching frequency ( 5V external clock signal ). IN 1(2) Vcc 90% Vcc - 5 V M1 (2) 10% Td on dV/dt on Tr 1 Tr 2 Figure 3 - Switching times definition (turn-on) IN1(2) 90% M1(2) 10% Td off Tf dV/dt off Figure 4 - Switching times definition (turn-off) 6 www.irf.com IR3221 IN1 t IN2 t SS t M1 Soft-Start sequence t M2 Breaking Mode (M1 & M2 grounded) Stand-by Mode (M1 & M2 opened) t Motor Current t Figure 5 - IN1 (2) & M1 (2) Timing Diagrams 50 40 30 20 10 0 -50 -25 0 25 50 75 100 125 150 5 4 ----- IN1h (2) -- -- IN1l (2) - - - -IN1 (2) hysteresis 3 2 1 0 -50 -25 0 25 50 75 100 125 150 Figure 6 - IN1 (2) current (A) Vs Tj (oC) Figure 7 - IN1 & IN1h (2) thresholds (V) Vs Tj (oC) www.irf.com 7 IR3221 25 30 20 20 15 10 10 5 0 0 10 20 30 0 -50 -25 0 25 50 75 100 125 150 Figure 8 - Rdson (m) (V) Vs Vcc (V) Figure 9 - Rdson (m) (V) Vs Tj (oC) 15 6 12,5 - - - 1'' square footprint ------- standard footprint 4 Eon Eoff 10 7,5 5 2 2,5 0 -50 0 50 100 150 200 0 0 3 5 8 10 13 15 Figure 10 - Max. Cont. current (A) Vs Amb. Temp. (oC) Figure 11 - Eon, Eoff (mJ) Vs | M1(2) (A) 8 www.irf.com IR3221 10 0 10 00 10 10 0 1 10 0 1 0 1,00E -06 1,00E -04 1,00E -02 1,00E +0 0 1,00E +0 2 1,00E +0 4 0 1.00E 03 1.00E 02 1.00E 01 1.00E + 1.00E + 1.00E + 1.00E + 00 01 02 03 Figure 12 - Transient Thermal Imped. (oC/W) Vs Time (S) Figure 13 - Iclamp (A) Vs Power Supply Wire Inductance (mH - single pulse) www.irf.com 9 IR3221 20 A H-Bridge Demoboard VCC Gnd + Bat. SS 680 IR 3221 M1 M2 LS gate 2 IN 2 IN 1 Clockwise motion IN 1 LS gate 1 390k R10 100nF 1k 39 39 M1 M2 D 2x1000uF D G S IRL 1404 1k IN 2 Counter clockwise motion G IRL 1404 S 5 1V 2.2uF CP1 SS Duty cycle ( if forced by an analog voltage ) 0V Logic circuitry return 10k 100nF 10k 100nF Note: Refer to AN 1032 application note for a detailed description of the functionality. DC Power Suplly 20 A Continuous operation DC Motor M1 VCC M2 OV M2 5V Logic command signals ( forward, reverse, braking, variable duty cycle ... etc ) Soft Start Programmable time constant R10 / CP1 IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 Data and specifications subject to change without notice. 11/14/2002 10 www.irf.com |
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