High efficiency switching-type motor driver BP5805B The BP5805B is an output-variable type 2-output DC motor driver module. This module can change the output voltage for driving the DC motor by inputting PWM signal or DC voltage into the control terminal. The power conversion rate is high, and power saving of the application can be realized, since the input voltage can be changed into the specified output voltage by the switching system. Further, this module can be used as the output-variable type DC / DC converter as well. Applications Refeigerator, The rotation-control type DC motor driver and the output-variable type DC / DC converter Features 1) Electrical power loss is small even when there is a difference between the input voltage and motor driving voltage, since electrical power conversion efficiency is high (90% Typ.) as the switching system is employed for changing the voltage. 2) Motor driving voltage can be set to any optional value by the output voltage control signal. 3) The control signal corresponds with both PWM signal and DC voltage. 4) The control terminal is easy to be designed, as it is only one-terminal type. 5) The two outputs are independent. 6) This can be used as the output-variable type DC / DC converter as well. 7) Space-saving package of SIP. Absolute maximum ratings (Ta=25°C) Parameter Power supply voltage Motor drive power supply voltage Output current Symbol Limits Unit VIN 7 V VM 18.5 V IO1, 2 0.6 (1.0 at peak) ∗1 A CTL input voltage VCTL 7 V Operating temperature range Topr −10 ∼ +70 °C Storage temperature range Tstg −25 ∼ +80 °C ∗1 Derating required according to the output voltage and ambient temperature. Recommended operating conditions (Ta=25°C) Parameter Symbol Min. Typ. Max. Unit Power supply voltage VIN 4.75 5.0 5.25 V Motor drive power supply voltage VM 13 14 15 V 1/6 BP5805B Block diagram ch1 1 11 HIGH SPEED DRIVE CIRCUIT CONTROL CIRCUIT 4 VOLTAGE CONVERSION CIRCUIT 2 ch2 10 HIGH SPEED DRIVE CIRCUIT CONTROL CIRCUIT VOLTAGE CONVERSION CIRCUIT 3 9 Pin descriptions Pin No. Pin name Function 1 VM Input power supply pin for motor drive ; connect a low impedance capacitor with a recommended capacitance of 100µF/35V. 2 CTL1 Output voltage control pin (ch2) ; PWM signal or DC signal is inputted. The output voltage can be changed either by changing the duty of PWM signal or by changing the DC voltage value. 3 CTL2 Output voltage control pin (ch1) ; PWM signal or DC signal is inputted. The output voltage can be changed either by changing the duty of PWM signal or by changing the DC voltage value. 4 VIN 9 GND Ground pin 10 OUT2 Output pin for motor drive (ch2) ; connect a low impedance capacitor with a recommended capacitance of 470µF / 35V. 11 OUT1 Output pin for motor drive (ch1) ; connect a low impedance capacitor with a recommended capacitance of 470µF / 35V. Power supply pin 2/6 BP5805B Electrical characteristics Parameter (Unless otherwise noted, Ta=25°C, VIN=5V, VM=14V, IO1=IO2=0.4A, fCTL=1kHz, DCTL=100%) Symbol VO1, 2 Output voltage Min. Typ. Max. Unit 12.12 12.82 13.52 V Conditions 11.82 12.82 13.0 V VM=13V DCTL=50% 5.41 6.41 7.41 V Ripple noise voltage ν − 50 150 mVPP ∗1 Efficiency η 80 90 − % ∗2 CTL frequency fCTL 50 − − Hz CTL input resistance RCTL 300 − − kΩ Pin 2, 3 Standby current IM − 0.01 − mA Pin 2, 3=GND, at pin 1 Standby current ICC − 4 − mA Pin 2, 3=GND, at pin 4 ∗1 Spike noise is not included. VO1 × IO1 + VO2 × IO2 ×100 (%) ∗2 Efficiency= VM × IM Measurement circuit BP5805B 1 2 3 4 A + V IM A C1 9 ICC + CTL See Fig.2 10 VO2 V 11 + A A V VIN VM Fig.1 C1 : 100µF / 35V (Low impedance) C2, 3 : 470µF / 35V (Low impedance) Circuit operations (1) Description BP5805B is a DC motor driver that can establish any output voltage by inputting PWM signal and DC voltage into the control pin (2,3pin). Electrical power loss is small even when there is a difference between the input voltage and output voltage, since changing from the input voltage into the specified output voltage can be made by the switching system. This module is most suitable in case that the number of rotation of the motor is controlled by changing the driving voltage, or in case that the motor of a lower specified voltage than 14V is driven by the electrical power source of 14V. (2)Control signals 1) PWM signal : the output voltage will be controlled by that duty. The larger the duty is, the higher the output voltage will be. It is necessary to be attentive, because the output voltage value changes depending on the H-level and L-level values of PWM signal as well, at this time. 2) DC voltage : the output voltage will be controlled by DC voltage value. The higher the voltage, the higher the output voltage will be. (3) The two outputs are independent. It is possible to control each output independently with a different kind of the control signal (PWM signal or DC voltage). 3/6 BP5805B 5.00V fCTL= 1 [Hz] T DCTL= TH × 100 [%] T 0V (Duty of control signal) TH TL T Fig.2 Application example BP5805B 1 2 3 4 9 10 11 Be sure to use fuse for safety 14V Power Supply for Motor + + 470µF M DC MOTOR 100µF 5V 470µF + M DC MOTOR Control Signal Fig.3 Operation notes (1) The output current should be reduced according to an increase in the output voltage or ambient temperature. Use the module within the derating curve range. (2) The protection circuit for output current is not incorporated. Be sure to take safety measures such as fusing if short-circuit loads or overcurrent is probable. (3) External capacitor Since the switching system is employed for the purpose of changing the voltage, ripple current flows to the capacitor to be added to pins 1, 10, 11. Select the product of which allowable ripple current is more than this value. 4/6 BP5805B Electrical characteristic curves 14 14 for DC voltage 1.0 × VO 12.8 12 0.6 × VO 12.8 Successive operating 0.25 × VO 12.8 10 8 6 4 5.00V 0V 2 0 0 40 70 OUTPUT VOLTAGE : VO (V) 12 Operating : 2sec. Standby : 2min. OUTPUT VOLTAGE : VO (V) OUTPUT CURRENT : IO (A) for PWM 100 0 20 40 60 Fig.4 Derating curve 6 4 0 80 DUTY : DCTL (%) Fig.5 Output voltage vs. Duty EX. Output voltage : 8V 8 0.6 × = 0.375A 12.8 8 2 fCTL=1kHz 0 AMBIENT TEMPERATURE : Ta (°C) 10 100 0 1 2 3 4 5 DC VOLTAGE : VCTL (V) Fig.6 Output voltage vs. DC voltage External dimensions (Units : mm) 12.0Max. 3.5±0.5 24.0Max. 38.5Max. 1pin SIDE MARK Marked side Marked side 1 2 3 4 9 10 11 0.25±0.05 2.54 6.3Max. 0.5±0.1 1.3±0.2 2.54×10=25.4 7.7Max. 4.3Max. SIP11 5/6 Precautions on Use of ROHM Power Module Safety Precautions 1) The products are designed and produced for application in ordinary electronic equipment (AV equipment, OA equipment, telecommunication equipment, home appliances, amusement equipment etc.). If the products are to be used in devices requiring extremely high reliability (medical equipment, transport equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car accessories, safety devices, etc.) and whose malfunction or operational error may endanger human life and sufficient fail-safe measures, please consult with the Company's sales staff in advance. If product malfunctions may result in serious damage, including that to human life, sufficient fail-safe measures must be taken, including the following: [a] Installation of protection circuits or other protective devices to improve system safety [b] Installation of redundant circuits in the case of single-circuit failure 2) The products are designed for use in a standard environment and not in any special environments. Application of the products in a special environment can deteriorate product performance. Accordingly, verification and confirmation of product performance, prior to use, is recommended if used under the following conditions: [a] Use in various types of liquid, including water, oils, chemicals, and organic solvents [b] Use outdoors where the products are exposed to direct sunlight, or in dusty places [c] Use in places where the products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [d] Use in places where the products are exposed to static electricity or electromagnetic waves [e] Use in proximity to heat-producing components, plastic cords, or othe flammable items [f] Use involving sealing or coating the products with resin or other coating materials [g] Use involving unclean solder or use of water or water-soluble cleaning agents for cleaning after soldering [h] Use of the products in places subject to dew condensation 3) The products are not radiation resistant. 4) The Company is not responsible for any problems resulting from use of the products under conditions not recommended herein. 5) The Company should be notified of any product safety issues. Moreover, product safety issues should be periodically monitored by the customer. Precautions Regarding Application Example and External Circuits 1) If change is made to the constant of an external circuit, allow a sufficient margin due to variations of the characteristics of the products and external components, including transient characteristics, as well as static characteristics. Please be informed that the Company has not conducted investigations on whether or not particular changes in the application examples or external circuits would result in the infringement of patent rights of a third party. 2) The application examples, their constants, and other types of information contained herein are applicable only when the products are used in accordance with standard methods. Therefore, if mass production is intended, sufficient consideration to external conditions must be made. Prohibitions Regarding Industrial Property 1) These Specifications contain information related to the Company’s industrial property. Any use of them other than pertaining to the usage of appropriate products is not permitted. Duplication of these Specifications and its disclosure to a third party without the Company’s permission is prohibited. 2) Information and data on products, including application examples, contained in these specifications are simply for reference; the Company does not guarantee any industrial property rights, intellectual property rights, or any other rights of a third party regarding this information or data. Accordingly, the Company does not bear any responsibility for: [a] infringement of the intellectual property rights of a third party [b] any problems incurred by the use of the products listed herein. 3) The Company prohibits the purchaser of its products to exercise or use the intellectual property rights, industrial property rights, or any other rights that either belong to or are controlled by the Company, other than the right to use, sell, or dispose of the products. 6/6