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LB11872H Datenblatt(PDF) 1 Page - ON Semiconductor |
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LB11872H Datenblatt(HTML) 1 Page - ON Semiconductor |
1 / 11 page 82708 MS PC/91002AS (OT) No.7257-1/11 http://onsemi.com Semiconductor Components Industries, LLC, 2013 May, 2013 LB11872H Overview The LB11872H is a three-phase brushless motor driver developed for driving the motors used for the polygonal mirror in laser printers and similar applications. It can implement, with a single IC chip, all the circuits required for polygonal mirror drive, including speed control and driver functions. The LB11872H can implement motor drive within minimal drive noise due to its use of current linear drive. Features • Three-phase bipolar current linear drive + midpoint control circuit. • PLL speed control circuit. • Speed is controlled by an external clock signal. • Supports Hall FG operation. • Built-in output saturation prevention circuit. • Phase lock detection output (with masking function). • Includes current limiter, thermal protection, rotor constraint protection, and low-voltage protection circuits on chip. • On-chip output diodes. Specifications Absolute Maximum Ratings at Ta = 25 °C Parameter Symbol Conditions Ratings Unit Supply voltage VCC max 30 V Output current IO max T ≤ 500ms 1.2 A Pd max1 Independent IC 0.8 W Allowable power dissipation Pd max2 *With specified substrate 2.0 W Operating temperature Topr -20 to +80 °C Storage temperature Tstg -55 to +150 °C ∗ When mounted on the specified printed circuit board : 114.3mm × 76.1mm × 1.6mm, glass epoxy Monolithic Digital IC For Polygonal Mirror Motors Three-Phase Brushless Motor Driver Ordering number : EN7257B Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. |
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Ähnliche Beschreibung - LB11872H |
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