ADVANCE INFORMATION Data Sheet No. PD60176-C IR2172 LINEAR CURRENT SENSING IC Features • • • • • • • • Product Summary Floating channel up to +600V Monolithic integration Linear current feedback through shunt resistor Direct digital PWM output for easy interface Low IQBS allows the boot strap power supply Independent fast overcurrent trip signal High common mode noise immunity Input overvoltage protection for IGBT short circuit condition • Open Drain outputs Description VOFFSET 600Vmax IQBS 1mA Vin +/-260mVmax Gain temp.drift fo 40kHz (typ.) Overcurrent trip signal delay 1.5usec (typ) Overcurrent trip level IR2172 is the monolithic current sensing IC designed for motor drive applications. It senses the motor phase current through an external shunt resistor, converts from analog to digital signal, and transfers the signal to the low side. IR’s proprietary high voltage isolation technology is implemented to enable the high bandwidth signal processing. The output format is discrete PWM to eliminate need for the A/D input interface. The dedicated overcurrent trip (OC) signal facilitates IGBT short circuit protection. The OC output pulse can be programmed by the external resistor and capacitor. The open-drain outputs make easy for any interface from 3.3V to 15V. Block Diagram 15V PWM Output 20ppm/oC (typ.) +/-260mV (typ.) Packages 8 Lead SOIC 8 Lead PDIP 16 Lead SOIC (wide body) Up to 600V V+ VCC V- PO IR2172 GND Overcurrent COM VB OC VS To Motor Phase ADVANCE INFORMATION IR2172 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 COM, 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 Definition Min. Max. Units VS High side offset voltage -0.3 600 VBS High side floating supply voltage -0.3 25 VCC Low side and logic fixed supply voltage -0.3 25 VIN Maximum input voltage between VIN+ and VIN- -5 5 VPO Digital PWM output voltage COM -0.3 VCC +0.3 VOC Overcurrent output voltage COM -0.3 VCC +0.3 VIN- VIN- input voltage (note 1) VS -5 VB+ 0.3 dV/dt Allowable offset voltage slew rate — 50 8 lead SOIC — .625 8 lead PDIP — 1.0 16 lead SOIC — 1.25 PD RthJA Package power dissipation @ TA ≤ +25°C Thermal resistance, junction to ambient 8 lead SOIC — 200 8 lead PDIP — 125 16 lead SOIC — 100 TJ Junction temperature — 150 TS Storage temperature -55 150 TL Lead temperature (soldering, 10 seconds) — 300 V V/ns W °C/W °C Note 1: Capacitors are required between VB and Vin-, and between VB and Vs pins when bootstrap power is used. The external power supply, when used, is required between Vs and Vin-, and between VB and Vs pins. Recommended Operating Conditions The output logic timing diagram is shown in figure 1. For proper operation the device should be used within the recommended conditions. Symbol Definition Min. Max. VS +13.0 VS +20 Units VB High side floating supply voltage VS High side floating supply offset voltage note 2 600 VPO Digital PWM output voltage COM VCC VOC Overcurrent output voltage COM VCC VCC Low side and logic fixed supply voltage 9.5 20 VIN Input voltage between VIN+ and VIN- -260 +260 mV TA Ambient temperature -40 125 °C V Note 2: Logic operation for Vs of -5 to +600V. Logic state held for Vs of -5V to -VBS. 2 www.irf.com ADVANCE INFORMATION IR2172 DC Electrical Characteristics VCC = VBS = 15V, unless otherwise specified. Symbol Definition VIN Nominal input voltage range before saturation Min. Typ. Max. Units Test Conditions -260 — 260 — — |VIN+ _ VIN-| VOC+ Overcurrent trip positive input voltage mV VOC- Overcurrent trip negative input voltage — 260 -260 VOS Input offset voltage -10 0 10 Input offset voltage temperature drift — 25 — µV/oC 157 162 167 %/V — 20 — ppm/oC µA ∆VOS/ ∆TA G Gain (duty cycle % per VIN) — VIN = 0V (Note 1) max gain error=5% (Note 2) ∆G / ∆TA Gain temperature drift ILK Offset supply leakage current — — 50 IQBS Quiescent VBS supply current — 1 2 mA IQCC Quiescent VCC supply current — — 1 LIN Linearity (duty cycle deviation from ideal linearity — 0.5 1 % Linearity temperature drift — .005 — %/ oC Digital PWM output sink current 20 — — 2 — — 10 — — 1 — — VB = VS = 600V VS = 0V curve) ∆VLIN/∆TA IOPO IOCC OC output sink current VO = 1V mA VO = 0.1V VO = 1V VO = 0.1V Note 1: ±10mV offset represents ±1.5% duty cycle fluctuation Note 2: Gain = (full range of duty cycle in %) / (full input voltage range). AC Electrical Characteristics VCC = VBS = 15V, unless otherwise specified. Symbol Definition Propagation delay characteristics fo Min. Typ. Max. Units Test Conditions Carrier frequency output — 40 — kHz Temperature drift of carrier frequency — 500 — ppm/oC figure 1 VIN = 0 & 5V Dmin Minimum duty — 7 — % VIN+=-260mV,VIN-=0V Dmax Maximum duty — 93 — ∆f/∆TA % VIN+=+260mV,VIN-=0V BW fo bandwidth 15 kHz VIN+ = 100mVpk -pk sine wave, gain=-3dB PHS Phase shift at 1kHz -10 o VIN+ =100mVpk-pk sine wave www.irf.com 3 ADVANCE INFORMATION IR2172 AC Electrical Characteristics cont. VCC = VBS = 15V, unless otherwise specified. Symbol Definition Proagation delay characteristics Min. Typ. Max. Units Test Conditions tdoc Propagation delay time of OC 1 1.5 — twoc Low true pulse width of OC — 1 — Timing Waveforms µsec Duty=7% Vin+= -260mV Vin- = 0V PO Duty=93% Vin+= +260mV Vin- = 0V PO Carrier Frequency = 40kHz Figure 1 Output waveform Application Hint: Temperature drift of the output carrier frequency can be cancelled by measuring both a PWM period and the on-time of PWM (Duty) at the same time. Since both periods vary in the same direction, computing the ratio between these values at each PWM period gives consistent measurement of the current feedback over the temperature drift. 4 www.irf.com ADVANCE INFORMATION IR2172 Lead Definitions Symbol Description VCC Low side and logic supply voltage COM Low side logic ground VIN+ Positive sense input VIN- Negative sense input VB High side supply VS High side return PO Digital PWM output OC N.C. Overcurrent output (negative logic) No connection Lead Assignment 1 VCC VIN+ 8 1 VCC VIN+ 8 2 PO VIN- 7 2 PO VIN- 7 3 COM VB 6 3 COM VB 6 4 OC VS 8 lead SOIC IR2172S 5 4 OC VS 1 NC NC 16 2 NC NC 15 3 VCC VIN+ 14 4 PO VIN- 13 5 COM VB 12 6 OC VS 11 7 NC NC 10 8 NC NC 9 5 8 lead PDIP IR2172 16 lead SOIC IR21726S www.irf.com 5 IR2172 ADVANCE INFORMATION Case Outline - 8 Lead SOIC (MS-012AA) 01-0021 09 8 Lead PDIP 6 01-3003 01 www.irf.com ADVANCE INFORMATION 16 Lead SOIC (wide body) IR2172 01-3014 03 IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 IR EUROPEAN REGIONAL CENTRE: 439/445 Godstone Rd., Whyteleafe, Surrey CR3 0BL, United Kingdom Tel: ++ 44 (0) 20 8645 8000 Data and specifications subject to change without notice. 6/20/2000 www.irf.com 7