DC Brushless Motor Driver IC PT-308F-B/PAVB PWM Speed Control Applications Package: SOP8 Double coils DC brushless motor. DC 4V ~ 18V. GND 2 O2 3 RD 4 PAVB PWM speed control Motor lock protection and automatic restart Rotate Detection output(Alarm) Frequency Generation output Low power dissipation and high driving efficiency 1 XXXX Features O1 8 HIN 7 VDD 6 PWM 5 FG Pin Description Input Devices Name Pin O1 1 First output pin O GND 2 DC ground G O2 3 Second output pin O RD 4 Rotation Detector, L: Rotation, H: Stop O FG 5 Frequency Generation O PWM 6 Pulse width modulation speed control I VDD 7 DC power supply P HIN 8 Hall IC signal input I Hall IC Description Type Specifications Absolute Maximum Ratings (Ta = 25 C) Symbol Parameter Maximum supply voltage V Conditions max DD Ratings Units 18 V mW Allowable power dissipation Pd 650* Operating temperature Ta -30 ~ +100 Storage temperature Ts -55 ~ +150 C Output current I 0ut Continoue 750 mA Peak 950 mA O C O * On 50mm x 50mm x 1.6mm glass epoxy board Any and all PROLIFIC products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your PROLIFIC representative nearest you before using any PROLIFIC products described or contained herein in such applications. PROLIFIC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all PROLIFIC products described or contained herein. PROLIFIC TECHNOLOGY INC. 7F, No.48, Sec.3, Nan Kang Rd., Nan Kang, Taipei, 115, Taiwan Ver. 1 .5 -1- Date: Mar. 2002 PT-308F-B/PAVB Electrical Characteristics Characteristic Supply Voltage Output Sink Symbol Test Condition VDD Min. Typ. Max. Units 4 VDS(ON) RL=15@12V 18 V 0.68 0.75 0.9 V 18 22 30 V 10 mA Voltage Output VBV(ON) Breakdown Voltage Supply Current IDD Output open@12V Driving Current IO RL=15@12V 735 750 755 mA RL=20@12V 562 570 575 mA RL=30@12V 384 385 389 mA RL=50@12V 234 235 236 mA RL=100@12V 119 119 119 mA FG/RD flow-in IFG/IRD Pull-high resistor is Current 25 mA 470ohm@12V FG/RD Supply 18 V Voltage FG Frequency Hall IC input signal devide one Hin Input Voltage Hin Input Current PWM Input High VDD-1.2 VDD V Low GND 0.3 V IIN Hin=12V 85 uA VDD=12V 10 uA Curent PWM vs Duty see Fig. 1 Ratio RL: DC impedance of inductor Truth Table Ver. 1 .5 Hin O1 O2 H GND VDD L VDD GND -2- Date: Mar. 2002 PT-308F-B/PAVB PWM Speed Control This Driver IC uses the pulse width modulation (PWM) to control motor's speed. Motor's speed is controlled by the PWM input voltage to adjust the PWM duty ratio (see figure 1). The PWM's control has two modes. One is the digital control, 0V for full speed and Vdd for low speed. The other is linear control, which can linear control the PWM duty ratio from 100/0 to 35/65. ON/OFF Ratio 100/0 50/50 35/65 3.5V Vcc-2V Vcc PWM Fig 1. PWM Speed Control Rotation Frequency and Detector This driver IC outputs the FG and RD signals for some special applications. For FG application, the driver IC will generate square wave to indicate the motor rotation frequency. According to the motor internal structure, the pole number is different for different motors. The FG will output the real motor's rotation frequency by dividing the pole number. For RD application, the driver IC will output a high signal to indicate the stop of the motor and a low signal to indicate the normal operation of the motor. Ver. 1 .5 -3- Date: Mar. 2002 PT-308F-B/PAVB Lock Protection In order to protect the motor, the driver IC will stop to driving the coil when the motor is locked over 0.4 seconds. Then, it restarts to drive the motor after 2.8 seconds. Figure 2 shows the timing diagram between the hall input signal and driver's output state. lock Lock detected rotate 0.4sec Hin driving 0.4sec On O1/O2 2.8sec shutdown Off RD FG t Fig 2. Lock Protection The driver IC architecture block diagram is shown in Fig. 3 Vcc Fan Lock Detection Lock Timing Control O1 O2 Hin Driver Timing Control Driver FG PWM FG PWM Speed Control RD RD Gnd Fig. 3. Driver IC Architecture Ver. 1 .5 -4- Date: Mar. 2002 PT-308F-B/PAVB Application circuits Double coil 1. Voltage Control 12V L2 R5 R1 10K 8 Vpwm 6 R6 R2 7 Hin R3 4.7K Vcc O1 Hall IC L1 Q1 1 R7 O2 3 FG 5 Q2 loading R8 PWM Gnd RD 4 2 R1 10K R2,R3 >470ohm~ R5,R6,R7,R8 is depended on the loading L1 and L2(see note2) Example : VPWM Ver. 1 .5 PWM FAN Speed Ratio(on/off) 0V~12V 100%~35% Full speed ~ Low speed GND 100% Full speed VDD 35% Low speed -4- Date: Mar. 2002 PT-308F-B/PAVB Application Circuits / Double Coil 2. Thermistor 12V L2 R5 R1 10K Hall IC 8 6 NTC 204GT L1 R6 7 1 O2 3 FG 5 PWM Gnd RD R3 4.7K Vcc O1 Hin R2 Q1 R7 Q2 loading R8 4 2 Example : NTC 204GT Temp.(°C) Ver. 1 .5 Thermistor PWM Kohm Ratio(on/off) 0 720.3 48% 10 421.8 54% 20 254.6 62% 30 158.2 71% 40 100.8 80% 50 65.85 90% 60 43.99 100.0% -5- FAN Speed Low speed Full speed Date: Mar. 2002 PT-308F-B/PAVB Application Circuits / Double Coil 3. Thermistor(NTC) for High slope temperature control 12V NTC 103GT L2 1K R1 10K R5 L1 R6 R2 7 Hall IC 47K 8 6 Beta 150 1 O2 3 FG 5 PWM Gnd RD 1K 4.7K Vcc O1 Hin R3 Q1 R7 Q2 loading R8 4 2 Re-slope Example : Thermistor PWM FAN Kohm Ratio(on/off) Speed 20 12.64 35% Low speed 30 7.968 50% 40 5.164 70% 50 3.436 90% 60 2.341 100.0% NTC 103GT Temp.(°C) Ver. 1 .5 -6- Full speed Date: Mar. 2002 PT-308F-B/PAVB Application Circuits / Double Coil 24V D0 4. 24V (or higher) R4 680 1/4W L2 R5 R1 10K Hall IC Z1 12V L1 R6 R2 7 8 6 4.7K Vcc O1 1 O2 3 Hin FG PWM Gnd RD R3 Q1 R7 Q2 loading R8 5 4 2 R1: 10K R2, R3 470ohm~ Z1: Vz=12V, 1/2W Note1: The connection of PWM pin refers the connection of 12V. Note2: The value of R4, R5, R6, R7, R8 is depend on the characteristics of L1and L2.(ex. R4: 680 1/4W, R5, R6: 2.2K, R7, R8: 680) Note3: The FG and RD are open drain outputs. Their High level can be defined by end user. The R2, R3 are the loading of FG and RD. Specifications of any and all PROLIFIC products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. PROLIFIC Technology Inc. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any and all PROLIFIC products described or contained herein fall under strategic products (including services) controlled under the Foreign Exchange and Foreign Trade Control Law of Taiwan, such products must not be exported with our obtaining export license from the Ministry of international Trade and Industry in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of PROLIFIC Technology Inc. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the Delivery Specification for the PROLIFIC product that you intend to use. Specifications and information herein are subject to change without notice. Ver. 1 .5 -6- Date: Mar. 2002 PT-308F-B/PAVB Package Outline GND 2 O2 3 RD 4 PAVB 1 XXXX H E SOP 8 L O1 8 HIN 7 VDD 6 PWM 5 FG XXXX: Date Code D e A A2 A1 C L b SYMBOLS Ver. 1 .5 DIMENSIONS IN MILLIMETERS(mm) MIN NOM MAX A 1.47 1.60 1.73 A1 0.10 - 0.30 A2 - 1.45 - b 0.33 0.41 0.51 C 0.19 0.20 0.25 D 4.80 4.85 4.95 E 3.81 3.91 3.99 H 5.79 5.99 6.20 e - 1.27 - L 0.38 0.71 1.27 -7- Date: Mar. 2002