bus ic Introduction dc/dc converter motor driver ic ripple counter driver ic I/O ic Sensor interface ic sensor ic ip’s E 910.06 Dual Ripple Counter E 910.40 Sensorless position control E 910.71 Sensorless position control ÿE 910.94 Sensorless speed control ÿ Sensorless speed control of DC-motors E910.94 features description ÿ Supply voltage range VS 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 Provides ripple signal for speed control of the motor current is evaluated and converted to a 5V digital ÿ Evaluation of commutation ripple signal signal for the µC. The filtered motor current is also buffered and ÿ Fully protected half bridge provided to the µC’s ADC. Many types of motors can be adapted (slew rate, gate voltage and temperature) pinning with appropriate filter design. ÿ Shoot through free PWM actuation for external power MOS half bridge The nominal motor voltage, provided by the µC is converted into a ÿ Internal charge pump for 100% actuation 20kHz PWM signal used to drive the power MOS half bridge. Duty ÿ Adjustable maximum motor voltage cycle of 100% is possible due to an implemented charge pump. ÿ Conditioning of motor current for external µP and ADC The CRASH signal immediately stops the motor in case of an error. ÿ Watch dog with emergency function depending on the Kl. 15 signal An over-temperature driver shut down is provided with appropriate TEMPFET transistors. With an integrated power supply and ÿ CRASH input for emergency shutoff of pump watch dog, an emergency function with maximum motor drive ÿ STATUS output for failure analysis can be realized in case the µC fails. ÿ Over voltage shutdown ÿ Over temperature shutdown application ÿ – 40°C to + 125°C operating temperature ÿ Fuel and hydraulic pumps control ÿ SO24w package ÿ Fan regulator ÿ Speed regulator 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 LSHOT Over temperature control of low side driver 13 HSHOT Over temperature control of high side driver 14 BS 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 STATUS BPO 2 23 RT VCRL 3 22 CT OUTC 4 21 PWMLP INNC 5 20 PWM SHUNT 6 19 RIPOUT VDD 7 18 PROG2 GND 8 17 KL15 9 16 LS 10 15 VMOT 11 14 LSOT 12 13 PROG1 VDD2 HS VBS HSOT So24 Block diagram VBAT VCC VS VDD VREG VDD HS 7V HSHOT CRASH Ctrl. STATUS Slewrate controlled KL15 BS FET WDOG VDD Driver PWM external µC alternatively applicable ! LSHOT PWM Gen 5k / 20kHz PWMLP VMOT R3 R4 PROG1 PROG2 Filter RIPOUT & BPO VCO + SHUNT _ INNC RSHUNT E910.94 RT 64 M LS CT VCLR OUTC R1 R2 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 © 2007 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited. www.elmos.de | [email protected] elmos product catalog 2007/2008 65