l7203 STMicroelectronics, l7203 Datasheet
l7203
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l7203 Summary of contents
Page 1
... THERMAL SHUTDOWN SUITABLE FOR 5V AND 12V APPLICATION ONLY ONE HALL SENSOR IS REQUIRED DESCRIPTION The L7203 SPINDLE MOTOR IC includes a three phase brushless spindle motor controller and the power stage in switching mode. The device is de- signed for both 5V and 12V OPTICAL DRIVE ap- plication requiring ...
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... L7203 DESCRIPTION (continued) SMOOTH DRIVING concept based on the idea of driving the motor wind- ing through 3 sinusoidal voltages dephased of 120 degrees. The motor is controlled in voltage mode current control compensation net- work is required. Each profile is digitally described by 36 bytes stored in a ROM memory. ...
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... ZD5 Bidirectional, open drain, 3.3-5V capability OD5 Output, open drain, 3.3-5V capability IA5 Input, Analog, 5V OA5 Output, Analog, 5V OA12 Output, Analog, 12V P12 Power 12V / 5V P5 Power 5V G Ground DESCRIPTION L7203 TYPE P12 IC5 IC5 IC5 IC5 ZD5 OD5 OA5 IA5 IA5 ...
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... L7203 THERMAL DATA Symbol R Thermal Resistance Junction to Pins th j-pins R Thermal Resistance Junction to Ambient th j-amb ABSOLUTE MAXIMUM RATINGS Symbol T Ambient Temperature amb T Operating Temperature op T Minimum Thermal Circuit Threshold smin (low side drive =off) PWMIN, PHS, FSYS, TEST, STB, HFG, BIAS, H+, H-, RF1, ...
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... 1. 15V M 220 -15 130 2.9 PRS = 0 10 PRS = case of high impedance on power supply line. M ence on pin Bias. This regulator can supply an output current up-to 15 mA. Figure 1. R PULL UP STB L7203 Typ. Max. Unit 3. 2.5 V + 100 A 240 ...
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... For the Motor Connection please refer to the Fig. 4. Current Limiter Figure 4. Motor Connections. L7203 D98IN882 The current limiter aim is to avoid that the current in the motor winding overides a fixed threshold value. The voltage input at the pin RF1 is pared with an internal 0 ...
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... If the PWMIN signal is stable during the entire cy- cle, the Kval is evaluated according to the follow- ing rule: - PWMIN signal stable to 1 -> Kval = +1023 - PWMIN signal stable to 0 -> Kval = -1023 In order to ensure the synchronization between Figure 9. D98IN931 INTERNAL REFERENCE SIGNAL PWMIN KVAL < 0 L7203 1023 0 D98IN884 KVAL > 0 KVAL < 0 7/13 ...
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... L7203 the PWMIN signal and the internal signals, the PWMIN signal rate must be calculated by the ex- ternal microcontroller using the same frequency signal provided to the chip through the pin fsys. Digital Multiplier This unit contains a multiplier executing the multi- plication of each sample provided by the memory by the value stored in kval register ...
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... L7203 Phase Shift (degree) LATCH 1.25 2.50 3.75 5.00 6.25 7.50 8.75 10 11.25 12.50 13.75 15.00 16.25 17.50 18.75 20 21.25 22.50 23.75 25.00 26.25 27.50 28. 100 101.25 102.50 103.75 105.00 106.25 107.50 108. ...
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... L7203 Table 1. (continued) PHS on time s 56.0 56.2 56.4 56.6 56.8 57.0 57.2 57.4 > 57.6 PHS on = tsys * 4 * Nphase where: tsys = 50ns if fsys = 20MHz The resulting PHASE SHIFT value is: PHASE SHIFT = Nphase(8: Nphase(2:0) x 1.25 For istance if Nphase = 00011 110 PHASE SHIFT = 1.25 = 37.5 Low Voltage Detector This circuit detects lower than a fixed CC threshold ...
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... D 12.6 13 0.496 E 7.4 7.6 0.291 e 1. 10.65 0.394 h 0.25 0.75 0.010 L 0.4 1.27 0.016 K 0˚ (min.)8˚ (max inch OUTLINE AND MECHANICAL DATA TYP. MAX. 0.104 0.012 0.020 0.013 0.512 0.299 0.050 0.419 0.030 0.050 L7203 SO20 h x 45˚ SO20MEC 11/13 ...
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... L7203 mm DIM. MIN. TYP. MAX. MIN. A 2.00 A1 0.05 0.002 A2 1.65 1.75 1.85 0.060 B (2) 0.22 0.38 0.009 C 0.09 0.25 0.003 D (1) 7.9 8.2 8.5 0.31 E 7.4 7.8 8.2 0.29 E1 (1) 5.0 5.3 5.6 0.20 e 0.65 L 0.55 0.75 0.95 0.022 L1 1.25 k 0˚ (min), 4˚ (typ), 8˚ (max) ddd 0.1 (1) “D and E1” dimensions do not include mold flash or protu- sions, but do include mold mismatch and are mesaured at datum plane “ ...
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... The ST logo is a registered trademark of STMicroelectronics © 2001 STMicroelectronics – Printed in Italy – All Rights Reserved Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. STMicroelectronics GROUP OF COMPANIES http://www.st.com L7203 13/13 ...