L6228Q STMicroelectronics, L6228Q Datasheet
L6228Q
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L6228Q Summary of contents
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... T J Description PWM OFF The L6228Q is a DMOS fully integrated stepper motor driver with non-dissipative overcurrent protection, realized in BCDmultipower technology, which combines isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. The device includes all the circuitry needed to ...
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... Wave drive mode (full-step one-phase-on 4.9 Non-dissipative overcurrent protection . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.10 Thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 6 Output current capability and IC power dissipation . . . . . . . . . . . . . . 25 7 Thermal management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 9 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 2/32 Doc ID 14321 Rev 4 L6228Q ...
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... L6228Q 1 Electrical data 1.1 Absolute maximum ratings Table 1. Absolute maximum ratings Symbol Parameter V Supply voltage S Differential voltage between OUT1 , OUT2 OUT1 , OUT2 Bootstrap peak voltage BOOT V ,V Input and enable voltage range IN EN Voltage range at pins REFA REFB V REFB V V Voltage range at pins RC ...
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... Thermal data Table 3. Thermal data Symbol R Thermal resistance junction-ambient max th(JA) 1. Mounted on a double-layer FR4 PCB with a dissipating copper surface of 0 ground layer connected through 18 via holes (9 below the IC). 4/32 Parameter (1) . Doc ID 14321 Rev 4 L6228Q Value Unit °C the top side plus 6 ...
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... L6228Q 2 Pin connection Figure 2. Pin connection (top view) Note: 1 The pins are connected to die PAD. 2 The die PAD must be connected to GND pin. Doc ID 14321 Rev 4 Pin connection 5/32 ...
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... If not used, it has to be connected to GND Bridge A source pin. This pin must be connected to power ground through a sensing power resistor. RC network pin. A parallel RC network connected between this pin and ground sets the current controller OFF-time of the bridge A. Doc ID 14321 Rev 4 Function L6228Q ...
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... L6228Q 3 Electrical characteristics Table 5. Electrical characteristics (T Symbol Parameter V Turn-on threshold Sth(ON) V Turn-off threshold Sth(OFF) I Quiescent supply current S T Thermal shutdown temperature j(OFF) Output DMOS transistors High-side + low-side switch ON R DS(on) resistance I Leakage current DSS Source drain diodes V Forward ON voltage SD t Reverse recovery time ...
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... mA; C Doc ID 14321 Rev 4 Min Typ 0.5 1 (1) 0.6 = 2.5 V 3.5 5.5 = 0.5 V ±5 500 1 2 OFF = OFF (1) 2.8 40 < 100 pF 200 EN < 100 pF 100 EN L6228Q Max Unit 100 kHz 1 µs 1 µs 1 µs 1 µs µs 1 MHz µs 3 µs µs µs 10 µ ...
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... L6228Q Figure 3. Switching characteristic definition EN V th(ON) V th(OFF) I OUT 90% 10% D01IN1316 Figure 4. Clock to output delay time CLOCK I OUT D01IN1317 Figure 5. Minimum timing definition; clock input CLOCK t FALL t D(OFF)EN V th(ON) V th(ON) V th(OFF) t CLK(MIN)L Doc ID 14321 Rev 4 Electrical characteristics RISE t D(ON) DCLK V th(OFF) ...
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... Electrical characteristics Figure 6. Minimum timing definition; logic inputs CLOCK LOGIC INPUTS RESET Figure 7. Overcurrent detection timing definition 10/32 V th(ON) V th(OFF R(MIN) I OUT I SOVER ON BRIDGE OFF V EN 90% 10% t OCD(ON) Doc ID 14321 Rev 4 V th(ON S(MIN) H(MIN) D01IN1319 RCLK(MIN) D02IN1399 t OCD(OFF) L6228Q ...
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... Circuit description 4.1 Power stages and charge pump The L6228Q integrates two independent power MOS full bridges. Each power MOS has an = 0.73 Ω (typical value @ 25 °C), with intrinsic fast freewheeling diode. Switching R DS(on) patterns are generated by the PWM Current Controller and the Phase Sequence Generator (see below) ...
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... ESD PROTECTION ESD PROTECTION Doc ID 14321 Rev 4 Figure = 1.8 V and V th(ON) th(OFF) or Figure 11. If driven by an open drain are connected as shown in EN and the capacitor EN should be chosen in the range EN and C are respectively 100 kΩ and D01IN1329 5V D01IN1330 5V D01IN1331 L6228Q 9. Typical = 1.3 V. ...
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... Synchronous Rectification and the output stage configuration are included in the next section. Immediately after the power MOS turns on, a high peak current flows through the sensing resistor due to the reverse recovery of the freewheeling diodes. The L6228Q provides a 1 μs blanking time t BLANK prematurely re-trigger the monostable ...
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... RCRISE . ON(MIN) Doc ID 14321 Rev OFF 1μs t BLANK Slow Decay t RCRISE t RCFALL 1μ versus C and R values. It can be OFF OFF is the internally generated DT of the voltage at the RCRISE for allowing a RCRISE can not be smaller ON L6228Q , which ON ...
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... L6228Q t > t ⎧ MIN ⎨ > ⎩ RCRISE t = 600 · C RCRISE Figure 15 shows the lower limit for the on time t capacity. It has to be said that t this condition, but it can be smaller than t to work but the off time t So, small C value gives more flexibility for the applications (allows smaller on time and, ...
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... MOS is operated in the synchronous rectification mode. When the monostable times out, the lower power MOS is turned on again after some delay set by the dead time to prevent cross conduction. 16/32 can vary maintaining the PWM regulation ON 100 10 2.5μs (typ. value) 1 0.1 1 Coff [nF] Doc ID 14321 Rev 4 L6228Q 10 100 ...
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... L6228Q Figure 16. Fast decay mode output stage configurations A) ON TIME Figure 17. Slow decay mode output stage configurations A) ON TIME 4.5 Stepping sequence generation The phase sequence generator is a state machine that provides the phase and enable inputs for the two bridges to drive a stepper motor in either full step or half step. Two full step modes are possible, the normal drive mode where both phases are energized each step and the wave drive mode where only one phase is energized at a time ...
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... Start Up or Reset 18/32 shows the motor current waveform state diagram for the state machine shows the motor current waveform and the state diagram for the state I OUTA OUTB CLOCK 1 2 D01IN1320 I OUTA OUTB CLOCK 1 3 D01IN1322 Doc ID 14321 Rev L6228Q ...
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... Start Up or Reset 4.9 Non-dissipative overcurrent protection The L6228Q 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 ...
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... Doc ID 14321 Rev 4 OUT1 VS OUT2 HIGH SIDE DMOSs OF THE BRIDGE POWER SENSE POWER DMOS n cells + REF FROM THE BRIDGE B D01IN1337 before DISABLE and R values and its EN EN before turning off the bridge when DELAY value. Its magnitude is reported in EN L6228Q 1 cell ...
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... L6228Q Figure 22. Overcurrent protection waveforms I OUT I SOVER th(ON) V th(OFF) ON OCD OFF ON BRIDGE OFF t OCD(ON DELAY t t EN(FALL) OCD(OFF) t D(OFF)EN Doc ID 14321 Rev 4 Circuit description EN(LOW) t DISABLE t t EN(RISE) D(ON)EN D02IN1400 21/32 ...
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... DELAY 4.10 Thermal protection In addition to the overcurrent protection, the L6228Q 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 °C hysteresis (typ ...
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... Typical component values for the application are shown in capacitor in the range of 100 to 200 nF should be placed between the power pins ( and ground near the L6228Q to improve the high frequency filtering on the power B 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 overcurrent protection) ...
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... Application information Figure 25. Typical application Note: To reduce the IC thermal resistance, therefore improve the dissipation path, the NC pins can be connected to GND. 24/32 Doc ID 14321 Rev 4 L6228Q ...
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... L6228Q 6 Output current capability and IC power dissipation In Figure 26, Figure between the output current and the IC power dissipation using PWM current control driving a two-phase stepper motor, for different driving sequences: ● HALF STEP mode energized. ● NORMAL DRIVE (FULL-STEP TWO PHASE ON) mode phases are energized during each step. ● ...
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... I [A] OUT Doc ID 14321 Rev 4 I OUT I OUT Test Conditions: Supply Volt age = PWM kHz (slow decay OUT I OUT Test Conditions: Supply Voltage = 24V kHz (slow decay OUT I OUT I B Test Conditions: Supply Voltage = 24V (slow decay (slow decay) SW L6228Q ...
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... L6228Q 7 Thermal management In most applications the power dissipation in the IC is the main factor that sets the maximum current that can be delivered by the device in a safe operating condition. Therefore, it has to be taken into account very carefully. Besides the available space on the PCB, the right package should be chosen considering the power dissipation ...
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... Databook (mm) Min Typ 0.80 0.85 0.18 0.25 0.165 0.175 4.85 5.00 3.00 3.10 1.10 1.20 4.85 5.00 4.20 4.30 0.60 0.70 0.50 0.30 0.40 Doc ID 14321 Rev 4 L6228Q www.st.com. Max 0.95 0.30 0.185 5.15 3.20 1.30 5.15 4.40 0.80 0.50 0.08 ...
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... L6228Q Figure 30. Package dimensions Doc ID 14321 Rev 4 Package mechanical data 29/32 ...
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... Order codes 9 Order codes Table 9. Ordering information Order code L6228Q L6228QTR 30/32 Package VFQFPN32 5x5x1.0 mm Doc ID 14321 Rev 4 L6228Q Packaging Tube Tape and reel ...
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... L6228Q 10 Revision history Table 10. Document revision history Date 14-Jan-2008 10-Jun-2008 28-Jan-2009 31-Aug-2010 Revision 1 First release Updated: Figure 25 on page 24 2 Added: Note 1 on page 4 3 Updated value in Table 3: Thermal data on page 4 4 Updated Table 9 Doc ID 14321 Rev 4 Revision history Changes 31/32 ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 32/32 Please Read Carefully: © 2010 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 14321 Rev 4 L6228Q ...