L6235 STMicroelectronics, L6235 Datasheet
L6235
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L6235 Summary of contents
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... BRAKE FUNCTION TACHO OUTPUT FOR SPEED LOOP CROSS CONDUCTION PROTECTION THERMAL SHUTDOWN UNDERVOLTAGE LOCKOUT INTEGRATED FAST FREEWEELING DIODES DESCRIPTION The L6235 is a DMOS Fully Integrated Three-Phase Motor Driver with Overcurrent Protection. Realized in MultiPower-BCD technology, the device BLOCK DIAGRAM VBOOT V BOOT VCP ...
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... L6235 ABSOLUTE MAXIMUM RATINGS Symbol Parameter V Supply Voltage S V Differential Voltage between OUT , OUT , SENSE and VS , OUT , SENSE Bootstrap Peak Voltage BOOT Logic Inputs Voltage Range Voltage Range at pin VREF REF V Voltage Range at pin RCOFF RCOFF ...
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... GND OUT VBOOT 30 8 BRAKE VREF FWD/REV 26 12 SENSE RCPULSE N. TACHO GND 19 D01IN1195A (5) PowerSO36 L6235 Unit C/W C/W C/W C/W C/W C 3/25 ...
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... L6235 PIN DESCRIPTION PACKAGE SO24/ PowerSO36 PowerDIP24 PIN # PIN # 18, 18 4/25 Name Type H Sensor Input Single Ended Hall Effect Sensor Input 1. 1 DIAG Open Drain Overcurrent Detection and Thermal Protection pin ...
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... C j (6) T =125 Low; OUT = Low; OUT = GND I = 2.8A LOW 2.8A f GND Logic Input Voltage 7V Logic Input Voltage Function . B Min Typ Max 6.6 7 7.4 5 165 0.34 0.4 0.53 0.59 0.28 0.34 0.47 0.53 2 -0.15 1.15 1.3 300 200 -0.3 0 -10 10 1.8 2.0 0.8 1.3 0.25 0.5 L6235 Unit 5/25 ...
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... L6235 ELECTRICAL CHARACTERISTICS (continued 48V , °C , unless otherwise specified) S amb Symbol Parameter Switching Characteristics t Enable to out turn-ON delay time D(on)EN t Enable to out turn-OFF delay time D(off)EN t Other Logic Inputs to Output Turn- D(on)IN ON delay Time t Other Logic Inputs to out Turn-OFF D(off)IN delay Time ...
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... Figure 1. Switching Characteristic Definition EN V th(ON) V th(OFF) I OUT 90% 10% D01IN1316 Figure 2. Overcurrent Detection Timing Definition t FALL t D(OFF)EN I OUT I SOVER ON BRIDGE OFF V DIAG 90% 10 OCD(ON) OCD(OFF RISE t D(ON)EN D02IN1387 L6235 7/25 ...
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... L6235 CIRCUIT DESCRIPTION POWER STAGES and CHARGE PUMP The L6235 integrates a Three-Phase Bridge, which consists of 6 Power MOSFETs connected as shown on the Block Diagram. Each Power MOS has 0.3 (typical value @25°C) with intrinsic DS(ON) fast freewheeling diode. Switching patterns are gen- erated by the PWM Current Controller and the Hall Effect Sensor Decoding Logic (see relative para- graphs) ...
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... PWM CURRENT CONTROL The L6235 includes a constant off time PWM Current Controller. The current control circuit senses the bridge current by sensing the voltage drop across an external sense resistor connected between the source of the three lower power MOS transistors and ground, as shown in Figure 7. As the current in the motor increases the voltage across the sense resistor increases proportionally ...
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... L6235 Figure 8. Output Current Regulation Waveforms I OUT V REF R SENSE V SENSE V REF 2.5V ON SYNCHRONOUS RECTIFICATION OFF D02IN1351 Figure 9 shows the magnitude of the Off Time t culated from the equations 0.6 · R · C RCFALL OFF OFF 0.6 · R OFF RCFALL DT where R and C are the external component values and t ...
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... ON(MIN) , the more influential will be the noises on the circuit OFF . OFF 4 R off 3 = 47k R off = 20k R off 10 1 0.1 1 Coff [nF] 10 1.5 s (typ. value) 1 0.1 1 Coff [nF] is not more constant. OFF = 100k 10 100 10 100 L6235 11/25 ...
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... L6235 SLOW DECAY MODE Figure 11 shows the operation of the bridge in the Slow Decay mode during the Off Time. At any time only two legs of the three-phase bridge are active, therefore only the two active legs of the bridge are shown in the figure and the third leg will be off. At the start of the Off Time, the lower power MOS is switched off and the current recirculates around the upper half of the bridge ...
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... GND High Z Vs High Z GND GND Vs Vs High Z 3->1 3->2 1-> L6235 - GND High Z 1-> 13/25 ...
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... L6235 TACHO A tachometer function consists of a monostable, with constant off time (t signal ( allows developing an easy speed control loop by using an external op amp, as shown in Figure 1 14. For component values refer to Application Information section. The monostable output drives an open drain output pin (TACHO). At each rising edge of the Hall Effect Sensors ...
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... Figure 15. Tachometer Speed Control Loop. V REF Figure 16. t versus C PULSE PUL 100 RCPULSE PUL PUL TACHO VREF REF2 REF1 R 2 and R . PUL 47k PUL 3 = 20k R PUL Cpul [nF TACHO MONOSTABLE = 100k PUL 100 L6235 15/25 ...
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... L6235 NON-DISSIPATIVE OVERCURRENT DETECTION and PROTECTION The L6235 integrates an Overcurrent Detection Circuit (OCD) for full protection. This circuit provides Output-to- Output and Output-to-Ground short circuit protection as well. With this internal over current detection, the exter- nal current sense resistor normally used and its associated power dissipation are eliminated. Figure 17 shows a simplified schematic for the overcurrent detection circuit ...
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... 0 Cen [nF] EN(LOW) t DISABLE t t EN(RISE) D(ON)EN D02IN1383 = 100 L6235 17/25 ...
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... L6235 APPLICATION INFORMATION A typical application using L6235 is shown in Figure 21. Typical component values for the application are shown in Table 3. A high quality ceramic capacitor (C power pins VS and VS and ground near the L6235 to improve the high frequency filtering on the power supply A B and reduce high frequency transients generated by the switching. The capacitor (C input to ground sets the shut down time when an over current is detected (see Overcurrent Protection) ...
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... W ith yer W ith Gro yer W ith Gro yer+ 16 via OUT OUT OUT No PWM kHz (slow decay about 35°C/W. Figure 26 shows th(j-amb) On-Board Copper Area L6235 19/25 ...
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... L6235 Figure 24. PowerDIP24 Junction-Ambient thermal resistance versus on-board copper area. º Figure 25. SO24 Junction-Ambient thermal resistance versus on-board copper area. º Figure 26. Mounting the PowerSO Package. ...
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... Figure 32. Typical Drain-Source Diode Forward DS(ON) I [A] SD 3.0 2.5 2.0 1.5 1.0 0.5 0.0 700 DS(ON) Supply Voltage T = 25° [V] S vs.Junction DS(ON) Temperature (typical value °C) DS(ON 100 T j [° Characteristic T = 25°C j 800 900 1000 1100 V [mV] SD L6235 vs 120 140 1200 1300 21/25 ...
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... L6235 mm DIM. MIN. TYP. MAX. A 3.60 a1 0.10 0.30 0.004 a2 3. 0.10 b 0.22 0.38 0.008 c 0.23 0.32 0.009 D (1) 15.80 16.00 0.622 D1 9.40 9.80 0.370 E 13.90 14.50 0.547 e 0.65 e3 11.05 E1 (1) 10.90 11.10 0.429 E2 2.90 E3 5.80 6.20 0.228 E4 2.90 3.20 0.114 G 0 0.10 H 15.50 15.90 0.610 h 1.10 L 0.80 1.10 0.031 N 10 (max (max.) (1): "D" and "E1" do not include mold flash or protrusions - Mold flash or protrusions shall not exceed 0.15mm (0.006 inch) - Critical dimensions are " ...
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... M 0˚ min, 15˚ max inch MECHANICAL DATA TYP. MAX. 0.170 0.130 0.018 0.020 0.060 0.065 0.010 0.012 1.250 1.255 0.325 0.100 0.260 0.270 0.300 0.135 L6235 OUTLINE AND Powerdip SDIP24L 23/25 ...
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... L6235 mm DIM. MIN. TYP. MAX. A 2.35 2.65 0.093 A1 0.10 0.30 0.004 B 0.33 0.51 0.013 C 0.23 0.32 0.009 15.20 15.60 0.598 ( 7.40 7.60 0.291 e 1.27 H 10.0 10.65 0.394 h 0.25 0;75 0.010 L 0.40 1.27 0.016 k 0˚ (min.), 8˚ (max.) ddd 0.10 (1) “D” dimension does not include mold flash, protusions or gate burrs. Mold flash, protusions or gate burrs shall not exceed ...
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