Introduction bus ic dc/dc converter motor driver ic ripple counter driver ic I/O ic Sensor interface ic sensor ic ip’s E 910.22 Wide range flyb. SMPS with WD E 910.24 | 25 | 26 PFM controller family E 910.27 Step down converter, fully integr. ÿ E 981.03 Energy storage controller E 910.28 Step down converter, for ext. FET ÿ Energy storage controller E981.03 features description ÿ Supply voltage range 8V to 16V(40V) This IC is designed to realise an uninteruptable power supply for ÿ Very high energy storage automotive applications such as airbags or any critical supply. The ÿ High voltage operation possible buffer time can be settled with using appropriate output capa- ÿ DC-DC transformer applications citors and output voltage. With a unique regulation scheme in- ÿ Permanent energy monitoring and restoration cluding pulse-by-pulse current limitation and inrush current limi- ÿ Very fast energy recovery tation, the converter offers a compact and efficient solution for ÿ Internal high current driver for external MOSFET’s automotive UPS. Using the bulk diodes of the power MOSFETS ÿ Dual current mode control schemes with simplifies the circuit. Security management and monitoring out- put completes the chip. All sequences necessary to ensure proper duty cycle limitation ÿ Under voltage lockout and thermal shutdown charging and discharging are implemented. The threshold levels ÿ Very low shutdown current of 150µA are optimized for automotive applications. ÿ – 40ºC to + 85ºC operating temperature ÿ PLCC28 package application ÿ Uninteruptable power supply ÿ Energy storage systems Block diagram pinning package Pin Name Description 1 VDD1 Internal logic supply 2 SWFB Voltage divider FB driver 3 AGND Analog Ground 4 VSEN Step down voltage sense 5 COMP Compensation 6 CSEN Step down current sense 7 BETR Mode 8 CST Soft start 9 CSIN Push pull current sense negative 10 CSIP Push pull current sense positive 11 HVMO HV monitor 12 HVFB HV feedback input 13 HVOV HV overvoltage input 14 TEST1 Test 15 TEST2 Test 16 TEST3 Test 17 WKUP Wake up input 18 AGND Analog ground 19 VDD VDD 20 PGND4 Power ground 21 DDRV FET driver 22 VDD4 DRV supply 23 PGND5 Power ground 24 DDRV DRV supply 25 VDD5 FET driver 26 PGND3 Power ground 27 VDD3 DRV supply 28 VDD2 Battery voltage supply input plcc 28 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. 34 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 35