LB1824 Sanyo Semiconductor Corporation, LB1824 Datasheet
LB1824
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LB1824 Summary of contents
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... Ordering number : ENN4264B Overview The LB1824 produces the direct PWM drive output appropriate for the brushless motors used in office data processing (OA) equipment, and integrates on a single chip the speed control circuits, FG amplifier, and other circuits required to form the drive circuit. Features • ...
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... Allowable power dissipation Operating temperature Storage temperature Allowable Operating Ranges 25°C Parameter Supply voltage range Supply voltage range FG Schmitt output, applied voltage Fixed voltage output current FG Schmitt output, output current Lock detection output current LB1824 Symbol Conditions V max CC V max M T ≤ 100 ms I ...
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... Gain-bandwidth product Reference voltage Crystal oscillator Operating frequency range Input high level voltage Start/stop pin Input low level voltage Pull-down resistance Input high level voltage Input low level voltage Forward/reverse pin Hysteresis Pull-down resistance LB1824 = Symbol Conditions I CC1 I When stopped CC2 V ...
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... Pd max – Ta Ambient temperature Ta – °C Pin Assignment Equivalent Circuit Block Diagram LB1824 No. 4264-4/10 ...
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... Sample Application Circuit AC Test Circuit Diagram LB1824 No. 4264-5/10 ...
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... FG amplifier output pin (post-schmitt). Open collector output. OUT X’tal 21 Crystal oscillator pin. Connect the crystal oscillator to this pin power supply pin power supply pin S/S 13 Start/stop control pin Start F/R 12 Forward/reverse control pin Forward LB1824 F/R = Low F/R = High IN2 IN3 IN1 IN2 IN3 ...
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... OSC 2.Direct PWM drive The LB1824 adopts a direct PWM drive method in order to reduce the power loss at the output. The output transistor is always saturated when on, and it adjusts the motor drive power by varying the duty that the output is on. Since the output switching is performed by the lower side transistor, Schottky diodes (D1, D2 and D3) must be attached between OUT and V ...
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... C3. After C3 has been charged when V is turned off (or in stop mode) the charge dissipated through an IC internal load resistance of CC about 10 kΩ that is connected to ground. LB1824 = 10 mA mA) FGS low), about 2.7 V (low ...
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... Rf voltage waveform during switching, this will not be a problem. 14. Oscillator A crystal oscillator is normally used with the LB1824. If the speed control conditions are not critical, a ceramic oscillator could be used. To avoid problems always consult the oscillator’s manufacturer concerning the oscillator itself and the external resistances and capacitances used ...
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... This catalog provides information as of July, 1999. Specifications and information herein are subject to change without notice. LB1824 and GND internal to the IC. (According to our data and INT ...