Preliminary Data Sheet No. PD60205 IR3221 FULLY PROTECTED H-BRIDGE for DC MOTOR Features • • • • • • • • Product Summary Over temperature shutdown Over current shutdown Ιnrush 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 Rdson Vcc.op. I cont. ( heat sink ) I shutdown Oper. Freq. 15 mΩ max. 5.5 to 35 V 20.0 A 50 A 20 kHz Packages Description 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. +5V VCC Gnd IR 3221 SS IN 1 LS gate 1 M1 M2 LS gate 2 IN 2 Clockwise motion 10 k R D D S S Counter clockwise motion G TO 220 Mosfet 5V G 10 k TO 220 Mosfet Debouncing RC networks ( e;g 10 nF ) C Electrical stop Micro Controller 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=50°C/W) Diode max. pulsed current Electrostatic Disch. (human body model)C=100 pF R= 1500 Ω Electrostatic Disch. ( Machine model ) C=200 pF R= 0 Ω Maximum power dissipation (Rth=50°C/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 typ 50 1.0 max - Unit °C/W °C/W 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 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 2 Parameter Continuous Vcc voltage High level IN1 (IN 2) input voltage Low level IN1 (IN2) input voltage Output cont. current ( Rthja=50°C/w, tamb=85°C, Tj=150°C ) Output cont. current ( Rthja=5°C/w, tamb=105°C, Tj=150°C ) 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 kΩ kΩ µF Ω Protections are operating down to 5.5 V www.irf.com IR3221 Static Electrical Characteristics o Tj = 25 C, VCC = 14V unless otherwise specified. Min. Typ. Max. Unit Rds on @ Tj = 25°C Symbol ON state resistance Tj = 25 °C - 12 16 mΩ Vin1,2 = 5 V ; Im1,2 = 5 A Rds on @ Tj = 150°C ON state resistance Tj = 150 °C - 20 - mΩ Vin1,2 = 5 V ; Im1,2 = 5 A Operating voltage range 5.5 - 35 V V clamp1 (2) Vcc to M1 (M2) clamp voltage 37 40 48 V Vf1(2) Body diode 1(2)forward voltage - 0.9 - V Id = 5 A ; Vin1,2 = 0 V Vcc oper. Parameter Test Conditions Id = 10 mA see Fig. 1 & 2 M1 (M2) output leakage current - 10 50 µA Vm1,2 = 0 V ; Tj = 25 °c Icc off Supply current when off - 10 50 µA Vin1,2 = 0 V, Tj = 25 °c Icc on Supply current when on - 8 - mA Vin1 = 5 V V ih1(2) threshold IN1 (IN2) high threshold voltage - 2.6 - V V il1 (2) threshold IN1 (IN2) low threshold voltage - 2.0 - V ON state IN1 (IN2) positive current - 35 - µA Vcc UVLO positive going threshold - 4.5 - V I M1(2) leakage I in1(2) Vccuv+ Vccuv- (sleep mode ) Vcc UVLO negative going threshold - 4.2 - V Vss + SS high level threshold - 4.2 - V Vss - SS low level threshold - 1.2 - V I ss leakage SS pin leakage current - - 10 uA Vin1,2 = 5 V Switching Electrical Characteristics VCC =14V, Resistive Load =2.8Ω, R input = 10kΩ, and Tj = 25oC for each high side switch (unless otherwise specified). Symbol Parameter Min. Typ. Max. Unit Test Conditions 5 - µS see fig. 3 td-on Turn-on delay time - Tr 1 Rise time to Vout = Vcc - 5 V - 4 - µS see fig. 3 Tr 2 Rise time to Vout = 90% of Vcc - 65 - µS see fig. 3 see fig. 3 dV/dt ( on ) Turn-ON dV/dt - 3 - V/µs Eon Turn-ON energy - 3 - mJ td-off Turn-off delay time - 65 - µS see fig. 4 Tf Fall time to Vout = 10% of Vcc - 8 - µS see fig. 4 Turn-OFF dV/dt - 5 - V/µs see fig. 4 Turn-OFF energy - 0.75 - mJ dV/dt ( off ) Eoff IN1(2) Max. Freq. Max. Frequency on IN1 (IN2 ) - 500 - Hz Soft-Start freq. Soft-Start oscillator frequency 15 20 30 kHz I g1 (2) Max. Trd www.irf.com Max. Gate 1 ( Gate 2 ) current 50 - - mA low side driver Min. IN1(2) OFF time to reset SS 2.0 - - mS C=3.0 uF,IN1=IN2 3 IR3221 Protection Characteristics (High side switch protection) Symbol Parameter Tsd Over-temperature threshold Isd Over-current threshold T reset Note : Min. Typ. Max. Unit - 165 - °C 50 60 A see fig. 2 300 - µS IN1=IN2 = 0 V 42 Minimum time to reset protections Test Conditions see fig. 2 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 IN2 L L L H H H L H H L L H * MODES HS1 LSS1 HS2 LSS2 SS reset 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 OFF OFF OFF ON OFF OFF ON ON* ON* OFF OFF OFF OFF ON OFF OFF OFF OFF ON OFF OFF ON* ON* OFF 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 VCC H Bridge logic control & status feedback IN 1 40 V Active Clamp Shoot-through protection G1 Over current shutdown 40 V Active Clamp Over current shutdown Over temp. protection Low Side Driver Shoot-through protection Low Side Driver M1 4 IN 2 M2 G2 Gnd 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 4.5 m Ω / 40 V – TO 220 packaged Power Mosfet IRL1404 Lead Assignments G D S m1 m1 m1 nc g1 gnd ss Vcc in2 in1 g2 nc m2 m2 m2 SIP 15 TO 220 IR 3221 IRL1404 Soft-Start Sequence IN1 (IN2) SS t Vss+ Vss- t M1-M2 (M2-M1) Duty cycle modulation follows SS voltage Tss ( approximately 2 x RC time constant ) www.irf.com t Trd 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 Note: +Bat Additional Schottky diodes Vcc Micro Controller Over-voltage protection In1 In2 ss Direction & Braking Gnd IR 3221 DC Motor Speed Star Connection 0V -Bat 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) dV/dt on 10% Td on Tr 1 Tr 2 Figure 3 - Switching times definition (turn-on) IN1(2) 90% M1(2) dV/dt off 10% Td off Tf Figure 4 - Switching times definition (turn-off) 6 www.irf.com IR3221 IN1 t IN2 t SS t M1 Soft-Start sequence t M2 t Stand-by Mode (M1 & M2 opened) Breaking Mode (M1 & M2 grounded) Motor Current t Figure 5 - IN1 (2) & M1 (2) Timing Diagrams 50 5 40 4 30 3 20 2 10 1 0 ----- IN1h (2) -- -- IN1l (2) - - - -IN1 (2) hysteresis 0 -50 -25 0 25 50 75 100 125 Figure 6 - IN1 (2) current (µA) Vs Tj (oC) www.irf.com 150 -50 -25 0 25 50 75 100 125 150 Figure 7 - IN1 & IN1h (2) thresholds (V) Vs Tj (oC) 7 IR3221 25 30 20 20 15 10 10 5 0 0 0 10 20 30 -50 Figure 8 - Rdson (mΩ) (V) Vs Vcc (V) -25 0 25 50 75 100 125 150 Figure 9 - Rdson (mΩ) (V) Vs Tj (oC) 6 15 - - - 1’’ square footprint ------- standard footprint 12,5 Eon Eoff 10 4 7,5 5 2 2,5 0 -50 0 50 100 150 200 Figure 10 - Max. Cont. current (A) Vs Amb. Temp. (oC) 8 0 0 3 5 8 10 13 15 Figure 11 - Eon, Eoff (mJ) Vs | M1(2) (A) 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 Figure 12 - Transient Thermal Imped. (oC/W) Vs Time (S) www.irf.com 0 1.00E 03 1.00E 02 1.00E 01 1.00E + 1.00E + 1.00E + 1.00E + 00 01 02 03 Figure 13 - Iclamp (A) Vs Power Supply Wire Inductance (mH - single pulse) 9 IR3221 20 A H-Bridge Demoboard VCC Gnd + Bat. IR 3221 SS 680Ω IN 1 LS gate 1 M2 M1 LS gate 2 IN 2 IN 1 390k R10 Clockwise motion 1k 39Ω 39Ω 100nF M1 G IRL 1404 2x1000uF M2 D D S G S IRL 1404 IN 2 Counter clockwise motion 1k 5 1V SS Duty cycle ( if forced by an analog voltage ) 0V Logic circuitry return 2.2uF CP1 10k 10k 100nF 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