L6228 STMicroelectronics, L6228 Datasheet
L6228
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L6228 Summary of contents
Page 1
... CROSS CONDUCTION PROTECTION THERMAL SHUTDOWN UNDER VOLTAGE LOCKOUT INTEGRATED FAST FREE WHEELING DIODES TYPICAL APPLICATIONS BIPOLAR STEPPER MOTOR DESCRIPTION The L6228 is a DMOS Fully Integrated Stepper Motor Driver with non-dissipative Overcurrent Protection, realized in MultiPower-BCD technology, which com- BLOCK DIAGRAM VBOOT V BOOT ...
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... L6228 ABSOLUTE MAXIMUM RATINGS Symbol Parameter V Supply Voltage S V Differential Voltage between OUT1 , OUT2 , SENSE OUT1 , OUT2 Bootstrap Peak Voltage BOOT V ,V Input and Enable Voltage Range Voltage Range at pins V REFA V and V REFB REFB V V Voltage Range at pins RC ...
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... D99IN1084 (5) PowerSO36 L6228 Unit C/W C/W C/W C/W C/W C/W GND N.C. N. OUT2 B N.C. VBOOT EN CONTROL HALF/FULL VREF B SENSE N.C. OUT1 B N.C. N.C. GND 3/26 ...
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... L6228 PIN DESCRIPTION PACKAGE SO24/ PowerSO36 Name PowerDIP24 PIN # PIN # 1 10 CLOCK 2 11 CW/CCW 3 12 SENSE OUT1 18, GND 18 OUT1 SENSE 11 26 VREF 12 27 HALF/FULL 13 28 CONTROL VBOOT 16 32 OUT2 17 33 ...
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... Test Conditions All Bridges OFF; ( -25°C to 125° (7) T =125 Low; OUT = Low; OUT = GND I = 1.4A LOW 1.4A f GND Logic Input Voltage 7V Logic Input Voltage L6228 Function Min Typ Max Unit 5.8 6 165 C 1.47 1.69 2.35 2. ...
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... L6228 ELECTRICAL CHARACTERISTICS (continued 25° 48V, unless otherwise specified) amb s Symbol Parameter V Turn-on Input Threshold th(ON) V Turn-off Input Threshold th(OFF) V Input Threshold Hysteresis th(HYS) Switching Characteristics t Enable to Output Turn-on Delay D(ON)EN (8) Time t Enable to Output Turn-off Delay D(OFF)EN (8) Time t (8) Output Rise Time ...
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... Figure 1. Switching Characteristic Definition EN V th(ON) V th(OFF) I OUT 90% 10% D01IN1316 Test Conditions A ( -25°C to 125° 4mA I = 4mA; C < 100pF 4mA; C < 100pF EN t FALL t t D(OFF)EN D(ON)EN L6228 Min Typ Max Unit 10 µA 2 2.8 3. 200 ns 100 RISE 7/26 ...
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... L6228 Figure 2. Clock to Output Delay Time CLOCK I OUT D01IN1317 Figure 3. Minimum Timing Definition; Clock Input CLOCK V Figure 4. Minimum Timing Definition; Logic Inputs CLOCK LOGIC INPUTS RESET V th(OFF) 8/26 V th(ON) V th(ON) th(OFF) t CLK(MIN)L V th(ON) t S(MIN) V th(ON R(MIN) RCLK(MIN DCLK V th(OFF) t D01IN1318 CLK(MIN)H t H(MIN) ...
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... Figure 5. Overcurrent Detection Timing Definition I OUT I SOVER ON BRIDGE OFF V EN 90% 10% D02IN1399 t t OCD(ON) OCD(OFF) L6228 9/26 ...
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... L6228 CIRCUIT DESCRIPTION POWER STAGES and CHARGE PUMP The L6228 integrates two independent Power MOS Full Bridges. Each Power MOS has an R 0.73 (typical value @ 25°C), with intrinsic fast free- wheeling diode. Switching patterns are generated by the PWM Current Controller and the Phase Se- quence Generator (see below) ...
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... PWM CURRENT CONTROL The L6228 includes a constant off time PWM current controller for each of the two bridges. The current control circuit senses the bridge current by sensing the voltage drop across an external sense resistor connected be- tween the source of the two lower power MOS transistors and ground, as shown in Figure 10. As the current in the motor builds up the voltage across the sense resistor increases proportionally ...
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... L6228 Figure 11. Output Current Regulation Waveforms I OUT V REF R SENSE V SENSE V REF 2.5V ON SYNCHRONOUS OR QUASI SYNCHRONOUS RECTIFICATION OFF D01IN1334 Figure 12 shows the magnitude of the Off Time t calculated from the equations 0.6 · R · C RCFALL OFF OFF 0.6 · R OFF RCFALL DT where R and C ...
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... PWM current regulation capacity. It has to ON because the device imposes this condition, but it can be smaller ON(MIN) , the more influential will be the noises on the circuit OFF and R OFF R off = 47k R off = 20k R off 1 Coff [nF] 2.5 s (typ. value) 1 Coff [nF] is not more constant. OFF = 100k 10 100 10 100 L6228 13/26 ...
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... L6228 DECAY MODES The CONTROL input is used to select the behavior of the bridge during the off time. When the CONTROL pin is low, the Fast Decay mode is selected and both transistors in the bridge are switched off during the off time. When the CONTROL pin is high, the Slow Decay mode is selected and only the low side transistor of the bridge is switched off during the off time ...
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... CCW is low (Counterclockwise movement). Figure 16. Half Step Mode Start Up or Reset Figure 17. Normal Drive Mode Start Up or Reset I OUTA OUTB 8 7 CLOCK D01IN1320 I OUTA OUTB 8 7 CLOCK D01IN1322 L6228 15/26 ...
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... Start Up or Reset NON-DISSIPATIVE OVERCURRENT PROTECTION The L6228 integrates an Overcurrent Detection Circuit (OCD) for full protection. This circuit provides protection against a short circuit to ground or between two phases of the bridge. With this internal over current detection, the external current sense resistor normally used and its associated power dissipation are eliminated. Figure 19 shows a simplified schematic of the overcurrent detection circuit ...
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... SOVER th(ON) V th(OFF) ON OCD OFF ON BRIDGE OFF t OCD(ON EN(LOW) t DELAY EN(FALL) OCD(OFF) t D(OFF)EN before recovering normal oper- DISABLE before turning off the DELAY value. Its magnitude is reported in Figure 22. value should EN t DISABLE t EN(RISE) D(ON)EN D02IN1400 L6228 EN and 17/26 ...
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... THERMAL PROTECTION In addition to the Ovecurrent Protection, the L6228 integrates a Thermal Protection for preventing the device destruction in case of junction over temperature. It works sensing the die temperature by means of a sensible element integrated in the die. The device switch-off when the junction temperature reaches 165°C (typ. value) with 15° ...
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... APPLICATION INFORMATION A typical Bipolar Stepper Motor Driver application using L6228 is shown in Fig. 23. Typical component values for the application are shown in Table 2. A high quality ceramic capacitor in the range of 100 to 200 nF should be placed between the power pins (VS filtering on the power supply and reduce high frequency transients generated by the switching. The capacitor connected from the EN input to ground sets the shut down time when an over current is detected (see Overcur- rent Protection) ...
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... L6228 Output Current Capability and IC Power Dissipation In Fig. 24, 25, 26 and 27 are shown the approximate relation between the output current and the IC power dis- sipation using PWM current control driving a two-phase stepper motor, for different driving sequences: – HALF STEP mode (Fig. 24) in which alternately one phase / two phases are energized. ...
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... Test Conditions: Supply Voltage = 24V I [A] OUT th(j-amb) I OUT I OUT Test Conditions: Supply Voltage = 24V kHz (slow decay OUT I OUT (slow decay (slow decay about 35°C/W. Fig. 31 shows mount- L6228 21/26 ...
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... L6228 Figure 28. PowerSO36 Junction-Ambient Thermal Resistance versus On-Board Copper Area. º Figure 29. PowerDIP24 Junction-Ambient Thermal Resistance versus On-Board Copper Area. º Figure 30. SO24 Junction-Ambient Thermal Resistance versus On-Board Copper Area. ...
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... DETAIL lead Gage Plane 0. PSO36MEC OUTLINE AND MECHANICAL DATA PowerSO36 DETAIL A slug BOTTOM VIEW D1 DETAIL B 0. SEATING PLANE (COPLANARITY) L6228 E3 23/26 ...
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... L6228 mm DIM. MIN. TYP. MAX. A 4.320 A1 0.380 A2 3.300 B 0.410 0.460 0.510 B1 1.400 1.520 1.650 c 0.200 0.250 0.300 D 31.62 31.75 31.88 E 7.620 8.260 e 2.54 E1 6.350 6.600 6.860 e1 7.620 L 3.180 3.430 M 0˚ min, 15˚ max 24/26 inch MIN. TYP. MAX. 0.170 0.015 0.130 ...
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... Mold flash, protusions or gate burrs shall not exceed 0.15mm per side. inch TYP. MAX. MECHANICAL DATA 0.104 0.012 0.200 Weight: 0.60gr 0.013 0.614 0.299 0.050 0.419 0.030 0.050 0.004 L6228 OUTLINE AND SO24 0070769 C 25/26 ...
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... L6228 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice ...