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KA2821D

Fairchild Semiconductor
Part Number KA2821D
Manufacturer Fairchild Semiconductor
Description Stepping Motor Driver
Published Sep 26, 2005
Detailed Description www.fairchildsemi.com KA2821D Stepping Motor Driver Features • • • • • • • Built-in chip enable function (Active low) ...
Datasheet PDF File KA2821D PDF File

KA2821D
KA2821D

Overview
www.
fairchildsemi.
com KA2821D Stepping Motor Driver Features • • • • • • • Built-in chip enable function (Active low) Low saturation voltage Low power dissipation Input level: TTL, LSTTL, 5V CMOS compatible Standard MPU direct interface Built-in Thermal Shutdown(TSD) circuit 2-CH H-bridge driver Description The KA2821D is a monolithic integrated circuit, and suitable as a two-phase stepping motor driver of a 3.
5-inch FDD system.
20-SOP-300 Typical Application • Floppy disk drive (FDD) • General stepping motor Ordering Information Device KA2821D Package 20-SOP-300 Operating Temp.
−20 ~ +75°C Rev.
1.
0.
2 May.
2000.
©2000 Fairchild Semiconductor International 1 KA2821D Pin Assignments 1 2 3 NC 4 SGND 5 PGND 6 PGND 7 SGND 8 DIRB 9 CE 10 NC 11 NC 12 VSB 13 BOUT 14 BOUT 16 17 AOUT PGND 15 PGND 20 19 18 AOUT NC VCC NC VSA KA2821D Pin Definitions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Pin Name NC VCC DIRA SGND PGND PGND SGND DIRB CE NC NC VSB BOUT BOUT P-GND P-GND AOUT AOUT VSA NC I/O I I I O O O O Pin Function Description No connection Logic part supply voltage A-channel direction input Signal ground Power ground Power ground Signal ground B-channel direction input Chip enable input No connection No connection B-channel seeking supply voltage B-channel output B-channel inverting output Power ground Power ground A-channel inverting output A-channel output A-channel seeking supply voltage No connection Channel A, B A A, B A, B A, B A, B B A, B B B B A, B A, B A A A - 2 KA2821D Internal Block Diagram 19 VCC VSA 2 18 AOUT DIRA 3 TTL Interface 17 16 TSD AOUT PGND 12 14 8 VSB BOUT DIRB TTL Interface 13 CE BOUT 9 15 PGND 3 KA2821D Absolute Maximum Ratings (Ta = 25°C) Parameter Logic part supply voltage Seeking supply voltage Input voltage Seeking output current (Continuouts) Seeking output current (Peak) Package power dissipation Operating temperature range Storage temperature Symbol VCC VSA, B VIN IOS IOSPEAK PD TOPR TSTG...


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