SI9987

Si9987 Vishay Siliconix Buffered H-Bridge FEATURES D D D D D D 1.0-A H-Bridge 500-kHz Switching Rate Shoot-Through Limited TTL Compatible Inputs 3.8- to 13.2-V Operating Range Surface Mount Packaging APPLICATIONS D D D D D D D VCM Driver Brushed Motor Driver Stepper Motor Driver Power Converter Optical Disk Drives Power Supplies High Performance Servo DESCRIPTION The Si9987 is an integrated, buffered H-bridge with TTL compatible inputs and the capability of delivering a continuous 1.0 A @ VDD = 5.0 V (room temperature) at switching rates up to 500 kHz. Internal logic prevents the upper and lower outputs of either half-bridge from being turned on simultaneously. Unique input codes allow both outputs to be forced low (for braking) or forced to a high impedance level. The Si9987 is available in an 8-Pin SOIC package, specified to operate over a voltage range of 3.8 V to 13.2 V, and the commercial temperature range of 0 to 70_C (C suffix) and –40 to 85_C (D suffix). FUNCTIONAL BLOCK DIAGRAM, PIN CONFIGURATION AND TRUTH TABLE SO-8 SA GND VDD SB 1 2 3 4 Top View Shoot-Through Protection Logic 8 OUTA INA INB OUTB INA (7) (3) VDD Si9987 7 6 5 TRUTH TABLE INA 1 0 0 1 (6) INB INB 0 1 0 1 OUTA 1 0 0 HiZ OUTB 0 1 0 HiZ GND (2) (1) SA (8) (5) OUTPUT A B (4) SB ORDERING INFORMATION Part Number Si9987CY-T1 Si9987DY-T1 Si9987CY Si9987DY Document Number: 70864 S-02936—Rev. C, 22-Jan-01 Temperature Range 0 to 70_C –40 to 85_C 0 to 70_C –40 to 85_C Package Tape and Reel Bul...