lb1876 Sanyo Semiconductor Corporation, lb1876 Datasheet
lb1876
Available stocks
Related parts for lb1876
lb1876 Summary of contents
Page 1
... Ordering number : ENN6201A Overview The LB1876 is a driver for polygon mirror motors such as used in laser printers and similar equipment. It incorporates all necessary circuitry (speed control + driver single chip. Direct PWM drive enables drive with low power loss. Functions and Features • ...
Page 2
... Amplitude [FGS output] Output saturation voltage Output leak current [CSD oscillator] Output High level voltage Output Low level voltage Amplitude External capacitor charge current External capacitor discharge current Oscillator frequency LB1876 Symbol Conditions V CC IREG VLD ILD VFGS IFGS = ...
Page 3
... Input open voltage High level input current Low level input current [BRSEL pin] High level input voltage Low level input voltage Input open voltage High level input current Low level input current LB1876 Symbol Conditions VPDH –100 µA O VPDL 100 µA ...
Page 4
... LB1876 IN3 OUT1 OUT2 LB1876 max — Ta 2.4 3 With substrate (114.3 76.1 1.6 mm 2.1 2.0 1.6 1.2 IC independent 0.9 0.8 0.4 0 – Ambient temperature, Ta — ºC OUT3 ...
Page 5
... The FRAME pin is connected internally to the metal frame at the base of the IC. Electrically, both the FRAME pin and the metal frame are left open. To improve thermal dissipation, provide a corresponding land on the FRAME — PCB and solder the FRAME pin to that land Not connected internally. Can be used for wiring. LB1876 Function No. 6201-5/14 ...
Page 6
... FGI N- – FGI N+ + CLK CLK PWM PWM OSC S/S S/S BRSEL BRSEL CSD SD OSC HYS AMP IN1+ IN1- IN2+ IN2- IN3+ VREG LB1876 VREG VREG FGS LD LDSEL LDSEL LTER VREG PLL TSD COMP LOGIC COUNT HALL LOGIC DRI VER HA LL IN3- GND1 ...
Page 7
... IN3– problem. FG inputs 10 FGIN1+ If noise on the FG signal is a problem, insert 11 FGIN1– either a capacitor or a filter consisting of a capacitor and a resistor. 12 GND1 Control circuit block ground 13 GND2 Sub-ground LB1876 Description Equivalent circuit VM2 29 300 28 VM1 VREG ...
Page 8
... If the protection circuit is not used, connect a capacitor and resistor (about 4700 pF, 220 kΩ) in parallel between this pin and ground. RF smoothing noise on the RF signal is a problem, insert a capacitor between this pin and ground. LB1876 Description VREG VREG VREG VREG Equivalent circuit 200 14 ...
Page 9
... Phase lock signal mask time setting A mask time of about 90 ms can be set by 23 CLD inserting a capacitor (about 0.1 µF) between this pin and ground. Leave this pin open if there is no need to mask. LB1876 Description VREG VREG VREG VREG Equivalent circuit 300 ...
Page 10
... Insert a capacitor between this pin and ground prevent noise from entering the IC. (Use a value µF or higher.) Stabilized power supply output (5 V output) 31 VREG Insert a capacitor between this pin and ground for stabilization. (About 0.1 µF.) LB1876 Description VREG VREG Equivalent circuit VREG 24 VREG 25 22k 2k ...
Page 11
... When low, reverse torque control is applied and when high, the circuit operates in free- running mode. An external Schottky barrier diode is required on the low side output when reverse torque control is applied. FREME This pin must be left open. LB1876 Description VREG VREG Equivalent circuit ...
Page 12
... LB1876 Overview 1. Speed control circuit This IC provides high-precision, low-jitter, and stable motor rotation since it adopts a PLL speed control technique. This PLL circuit compares the phases of the edges on the CLK signal (falling edges) and the FG signal (falling edges on the FG +.FGS output) and controls the speed using that error output. ...
Page 13
... The mask time is set with the capacitor connected between the CLD pin and ground. Mask time (seconds) ≈ 0.9 C (µF) A mask time of about 90 ms can be set by using a capacitor of about 0.1 µF. If complete masking is required, the mask time must be set large enough to provide ample margin. If masking is not required, leave the CLD pin open. LB1876 No. 6201-13/14 ...
Page 14
... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of June, 2002. Specifications and information herein are subject to change without notice. LB1876 PS No. 6201-14/14 ...