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| Data Sheet No.PD60211 rev.D IR3312(S) PROGRAMMABLE CURRENT SENSING HIGH SIDE SWITCH Features * * * * * * * Load current feedback Programmable over current shutdown Active clamp E.S.D protection Input referenced to Vcc Over temperatue shutdown Reverse battery protection Product Summary Rds(on) Vcc.op. Current ratio Ishutdown Active clamp Load Dump Package 20m 6 to 28V 2800 3 to 30A 35V 40V Description The IR 3312(S) is a Fully Protected 4 terminal high side switch. The input signal is referenced to Vcc. When the input voltage Vcc - Vin is higher than the specified Vih threshold, the output power MOSFET is turned-on. When Vcc - Vin is lower than the specified Vil threshold, the output MOSFET is turned-off. A sense current proportional to the current in the power Mosfet is sourced to the Ifb pin. Over-current shutdown occurs when Vifb - Vin > 4.5 V. The current shutdown threshold is adjusted by selecting the proper RIfb. Either over-current and over-temperature latches off the switch. The device is reset by pulling the input pin high. Other integrated protections ( ESD, reverse battery, active clamp ) make the IR3312(S) very rugged and suitable for the automotive environment. 5 Lead TO220 IR3312 5 Lead D2Pak (SMD220) IR3312S Typical Connection VCC IN Ifb 10 k IR 3312 OUT LOAD Battery RIfb on off System Ground Power Ground www.irf.com 1 IR3312(S) Absolute Maximum Ratings Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are referenced to Vcc lead. (TAmbient = 25oC unless otherwise specified). Symbol Vcc - Vin max Vcc-VIfb max Vcc - Vout max. Ids cont. Ids1 cont Ids pulsed ESD 1 ESD 2 Pd TJ max. Min RIfb Ifb max Parameter Maximum input voltage Maximum Ifb voltage Maximum output voltage Diode max. permanent current (Rth = 60 C/W) (1) Diode max. permanent current (Rth = 5 C/W) (1) Diode max. pulsed current (1) Electrostatic discharge ( human body model )C=100pF, R=1500, Electrostatic discharge (machine model)C=200pF,R=0, L=10H Power dissipation ( Rth = 60 C/W ) Max. storage and junction temperature Minimum resistor on the Ifb pin Max. Ifb current Min. -16 -0.3 -0.3 -- -- -- -- -- -- -40 0.3 -20 Max. 50 50 33 2.8 25 100 4 0.5 2 150 -- +20 Units V A kV W C k mA Thermal Characteristics Symbol R th R th R th R th 1 2 1 2 Parameter Thermal resistance junction to Ambient - TO220 Thermal resistance junction to case - TO220 Thermal resistance with standard footprint - SMD220 Thermal resistance with 1" square footprint - SMD220 Thermal resistance junction to case - SMD220 Typ. 60 0.7 60 35 0.7 Max. -- -- -- -- -- Units C/W R th 3 Recommended Operating Conditions These values are given for a quick design. For operation outside these conditions, please consult the application notes. Symbol Vcc Vcc -Vin -VIfb Parameter Continuous input voltage Continuous Ifb pin voltage Supply to power ground voltage Continuous output current ( Rth/amb < 5 C/W, Tj = 125C) Continuous output current ( Rth/amb < 60 C/W, Tj = 125C) Ifb resistor to program Isd and scale (2 & 3) Minimum turn-on pulse width Maximum operating frequency Maximum frequency with protections activated Min. 6 0.3 6 -- -- 0.5 1 -- -- Max. 28 28 28 14 3.9 3.5 -- 500 200 Units V Vcc Iout Iout 85C amb. RIfb Pulse min. Fmax Fmax Prot. A k ms Hz 1) Limited by junction temperature. Pulsed current is also limited by wiring 2) <500 Ohm or shorting Ifb to gnd may damage the part with Isd around 37A 3) >5000 Ohm or leaving Ifb open will shutdown the part. No current will flow in the load. 2 WWW.IRF.COM IR3312(S) Protection Characteristics Symbol VIfb -Vin @ Isd Tsd Treset OV Isdf Isd_1k Min.Pulse WAIT Tj = 25oC (unless otherwise specified), RIfb = 500 to 5kOhm. Parameter Over-current shutdown threshold Over-temp. shutdown threshold Protection reset time Over voltage shutdown (not latched) Fixed over current shutdown Adjustable over current shutdown 1K Minimum pulse width (no WAIT state) WAIT function timer Min. 4 -- -- 33 30 9 200 0.5 10 Typ. 4.5 165 50 36 37 12 500 1.2 16 Max. Units Test Conditions 5.4 -- 300 41 45 16 1200 3.5 28 V C S V A A s ms m see Fig. 7 see Fig. 7 VIfb Static Electrical Characteristics (Tj = 25oC, Vcc = 14V unless otherwise specified.) Symbol Iq Iin Vih Vil Vhys Iout qs Rds1 on Rds2 on Rds3 on Vclamp1 Vclamp2 Vsd Vaval. Parameter Total quiescent current (Iout +Ifb) Input current High level input threshold voltage (4) Low level input threshold voltage (4) Input hysterisis = Vih-Vil Output quiescent current ON state resistance (5) ON state resistance (5) ON state resistance (5) Vcc to Vout active clamp voltage Vcc to Vout active clamp voltage Body diode forward voltage Vcc to Vout avalanche voltage Min. -- 1.5 -- 3.5 0.4 -- 10 10 20 33 -- -- 40 Typ. 22 4 5 4 1 9 15 16 28.5 35 36 0.85 43 Max. Units Test Conditions 50 6 5.5 -- 1.5 15 20 28 38 -- 40 1 50 A mA V A Vcc-Vin=0; Vcc-VIfb=0; Vcc-Vout=12V Iout=15A, Vcc-Vin=14V Iout=10A, Vcc -Vin=6V Iout=15A, Tj = 150oC Iout = 10mA Iout=30A,Vcc-VIfb<20V Iout=5A Iout=100mA,Vcc-Vfb> 35V Vcc-Vin=0, Vcc- Vout=12V Vcc-VIfb=12V Vcc-Vin=14V m V Switching Electrical Characteristics Vcc = 14V, Resistive Load = 0.4, Tj = 25oC, (unless otherwise specified). Symbol Parameter Tdon Tr1 Tr2 E on Td off Tf Eoff Turn-on delay time to Vcc-Vout= 0.9 Vcc Rise time to Vcc-Vout=5V Rise time to Vcc -Vout = 0.1Vcc Turn ON energy Turn-off delay to Vcc -Vout = 0.1Vcc Fall time to Vcc-Vout = 0.9 Vcc Turn OFF energy Min. 2 0.2 5 -- 5 2 -- Typ. Max. Units Test Conditions 9 1 15 0.75 14 7 0.5 20 5 60 1.5 60 25 1 s see figure 2 mJ s mJ see figure 3 4) Input thresholds are measured directly between the input pin and the tab. Any parasitic resistance in common between the load current path and the input signal path can significantly affect the thresholds. 5) Rds(on) is measured between the Tab and the Out pin, 5mm away from the package. WWW.IRF.COM 3 IR3312(S) Current Sense Characteristics Symbol Parameter Ratio I load / IIfb current ratio Min. 2,400 -5 -0.45 -- Typ. 2,800 0 0 5 Max. Units Test Conditions 3,300 +5 0.45 15 -- % A s Tj = 25oC ,Rfb = 500, I = 30A Tj = -40 T0 +150oC I = 2A 90% of the I load step Ratio_TC Iload/Ifb variation over temperature offset Load current diagnostic offset Trst Ifb response time (low signal) Functional Block Diagram VCC charge pump 4mA 70V active clamp disconnection driver On/Off fast turn-off 70V 33V + 33V Reset 36V 33V Q latch Set Wait timer 1.5 ms 4V + 80 I out > 30 A Tj > 165 C reverse battery protection 43V timer 300 us + Min. pulse IN 4 Ifb OUT WWW.IRF.COM IR3312(S) Lead Assignments 3 (Vcc) 3 (Vcc) 1 - In 2 - Ifb 3 - Vcc (tab) 4 - NC 5 - Out 12345 12345 5 Lead - TO220 IR3312 Part Number 5 Lead - D2PAK (SMD220) IR3312S Vcc-Vin Vcc-Vin max Vcc-Vin1 max Vcc-Vin (op) Vih Vil Vhys Iin Iin Vcc-Vin Vcc In IR3312 Vcc-Vout Vcc-Vout max Vclamp1 Vclamp2 Vcc 90% max Iin1,2 Iin(on) VIfb Ifb Ifb Out Iout Iout max -Ids cont. -Ids pulsed Iout 85C Isd Iq Vcc-Vout 5V 10 % DV/dt(on) Td on Tr1 Tr2 Figure 1 - Voltages and currents definitions Figure 2 - Switching time definitions (turn-on) WWW.IRF.COM 5 IR3312(S) Vcc Vcc-Vin Vin 90% Vcc-Vout 10 % Ids DV/dt(off) Vds clamp T clamp Vcc Td off Tf Vout Vcc-Vclamp ( see Design tip to evaluate power dissipation ) Figure 3 - Switching time definitions (turn-off) Figure 4 - Active clamp waveforms Vin clamp Vcc-Vin 12V 0V I Load 24 us (typ.) Ifb T minpulse T minpulse Wait 0V Iout Precise measurement Figure 5 - Current sense precision: Accurate measurement only when the power Mosfet is fully ON Figure 6 - Minimum pulse & WAIT function 6 WWW.IRF.COM IR3312(S) Vcc-Vin 12V 0V Iout Isd t < T reset t > T reset t < T reset t > T reset OI shutdown wait wait Tj OT shutdown Tjsd Figure 7 - Protection Timing Diagrams All curves are typical characteristics. Operation in hatched areas is not recommended. Tj=250C, RIfb=500 Ohm, Vcc=14V (unless otherwise specified). 10 8 6 4 2 0 0 10 20 30 40 50 60 70 40 35 30 25 20 15 10 5 0 0 5 10 15 20 25 30 Figure 9- Rdson (m) vs Vcc-Vin (V) Figure 8 - Icc (mA) vs Vcc-Vin (V) WWW.IRF.COM 7 IR3312(S) 200% 180% 160% 140% 120% 100% 80% 60% 40% 20% 0% -50 -25 0 25 50 75 100 125 150 6 5 4 3 2 1 0 -50 Vifb-Vin Vih Vil -25 0 25 50 75 100 125 150 Figure 10 -Normalized Rdson (%) vs Tj (oC) Figure 11 - Vih, Vil & Vifb -Vin (V) vs Tj (oC) 100 4 Max. specified 3 2 Typical value 1 0 0 15 Figure 12 - Error (+/-A) vs Iload (A) Isd min 3s isd typ Isd max 3s 10 30 1 100 1000 Figure 13 - Isd (A) vs RIfb (Ohm) 10000 8 WWW.IRF.COM IR3312(S) 35 30 25 20 100 5C/W 15C/W 35C/W 1'' foot 60C/W std fooprint single pulse 100Hz rth=60C/W dT=25C 1kHz rth=60C/W dT=25C 10 15 10 5 0 -50 0 50 100 150 200 1 0. 001 0. 01 0. 1 1 10 Figure 14 - Max. DC current (A) vs Temp. (C) Figure 15 - Max. I (A) vs inductance (mH) 100 100 60C/W free air Current path capability should be above those curves 10 5C/W 10 Load characteristic should be above those 1 T=25C free air/ std. footprint T=100C free air/ std. footprint 1 1E-05 0. 0001 0. 001 0. 01 0. 1 1 10 100 1000 0. 1 0. 0001 0. 001 0. 01 0. 1 1 10 100 1000 Figure 16 - I out (A) vs Protection resp. Time (s) Figure 17 - Rth (oC/W) vs Time (s) WWW.IRF.COM 9 IR3312(S) Case Outline - TO220 (5 lead) IRGB 01-3042 01 10 WWW.IRF.COM IR3312(S) Case Outline 5 Lead - D2PAK (SMD220) WWW.IRF.COM 11 IR3312(S) Tape & Reel 5 Lead - D2PAK (SMD220) 01-3071 00 / 01-3072 00 IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 Data and specifications subject to change without notice. This product has been designed and qualified for the Automotive [Q100] market. 7/26/2004 12 WWW.IRF.COM |
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