BUS IC DC/DC CONVERTER MOTOR DRIVER IC RIPPLE COUNTER DRIVER IC I/O IC SENSOR IC SENSOR INTERFACE IC Position control Position control + driver ÿ Speed control Ripple detection ÿ Sensorless speed control of DC-motors FEATURES E910.94 DESCRIPTION PINNING ÿ Supply voltage range VDD 7V to 16V The IC is designed to control the speed of DC-motors. In order ÿ Low standby current typ. 40µA to determine the motor speed the commutation-related ripple ÿ Speed regulation using the ripple signal of of the motor current is evaluated and converted to a 5V digital motor current signal for the µC. The filtered motor current is also buffered and ÿ Evaluation of commutation ripple signal provided to the µC’s ADC. Many types of motors can be adapted ÿ Fully protected half bridge with appropriate filter design. (slew rate, gate voltage and temperature) ÿ Overlap free PWM actuation for external The nominal motor voltage, provided by the µC is converted into a power MOS half bridge 20kHz PWM signal used to drive the power MOS half bridge. Duty ÿ Internal charge pump for 100% actuation cycle of 100% is possible due to an implemented charge pump. ÿ Adjustable maximum motor voltage ÿ Conditioning of motor current for external The CRASH signal immediately stops the motor in case of an error. µP and ADC An over-temperature driver shut down is provided with appropri- Watch dog with emergency function depending ate TEMPFET transistors. With an integrated power supply and on the Kl. 15 signal watch dog, an emergency function with maximum motor drive ÿ CRASH input for emergency shutoff of pump can be realized in case the µC fails. ÿ STATUS output for failure analysis ÿ Over voltage shutdown ÿ Over temperature shutdown ÿ Fuel and hydraulic pumps regulator ÿ – 40°C to + 125°C operating temperature ÿ Fan regulator ÿ SO 24w package ÿ Speed regulator ÿ BLOCK DIAGRAM APPLICATION PACKAGE Pin Name Description 1 CRASH Digital input crash signal 2 BPO Bandpass output 3 VCRL VCO control voltage 4 OUTC Current amplifier output 5 INNC Current amplifier, inverting input 6 SHUNT Current amplifier, non-inverting input 7 VDD 5 V voltage control output 8 GND Ground 9 KL15 Signal input Kl. 15 10 LS Gate output for low side driver 11 VMOT Input motor voltage 12 LSOT Over voltage control of low side driver 13 HSOT Over voltage control of high side driver 14 VBS I/O for bootstrap voltage 15 HS Gate output for high side driver 16 VDD2 Positive supply voltage, battery voltage 17 PROG1 Programming of filter gain 18 PROG2 Programming of filter gain 19 RIPOUT Digital output ripple signal 20 PWM PWM input motor target value 21 PWMLP Pin for PWM lowpass capacitor 22 CT Timing capacitor for VCO 23 RT Timing resistor for VCO 24 STATUS Digital output for status signal CRASH 1 24 BPO 2 23 VCRL 3 22 OUTC 4 21 INNC 5 20 SHUNT 6 19 VDD 7 18 GND 8 17 KL15 9 16 LS 10 15 VMOT 11 14 LSOT 12 13 STATUS RT CT PWMLP PWM RIPOUT PROG2 PROG1 VDD2 HS VBS HSOT VBAT VS VCC VDD VREG VDD HS 7V HSHOT CRASH Ctrl. STATUS Slewrate controlled KL15 BS FET WDOG VDD Driver M LS PWM µC LSHOT PWM Gen 5k / 20kHz PWMLP R3 VHOT R4 PROG1 PROG2 Filter RIPOUT & BPO VCO + _ SHUNT INNC R1 RT 50 CT VCLR OUTC R2 RSHUNT Note ELMOS Semiconductor AG (below ELMOS) reserves the right to make changes to the product contained in this publication without notice. ELMOS assumes no responsibility for the use of any circuits described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication has been checked, no responsibility, however, is assumed for inaccuracies. ELMOS does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications. Copyright © 2005 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited. www.elmos.de | [email protected] elmos product catalog june 2005 51