lb1975 Sanyo Semiconductor Corporation, lb1975 Datasheet
lb1975
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lb1975 Summary of contents
Page 1
... Ordering number : ENN6087A Overview The LB1975 is a three-phase brushless motor driver IC suited for use in direct PWM driving of DC fan motors for air conditioners, water heaters, and other similar equipment. Since a shunt regulator circuit is built in, single power supply operation sharing the same power supply for the motor is supported ...
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... Parameter Supply voltage Output current Maximum input current Allowable power dissipation Operating temperature Storage temperature Allowable Operating Ranges 25°C Parameter Supply voltage range Input current range FG pin applied voltage FG pin output current LB1975 Symbol Conditions V max CC V max M I max O I ...
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... REG Pin voltage [V Pin] CTL Input voltage Input bias current [V Amplifier] CTL Reference voltage Output voltage [Start/Stop Pin] High-level input voltage range Low-level input voltage range Input open voltage LB1975 = Symbol Conditions sat1 ( 1 (sink ...
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... IL V (F/R) IO ∆V (F/ (F/R) V (F/ (F/R) V (F/ – + – + – IN1 IN2 IN2 IN3 LB1975 (NC) OUT1 OUT2 OUT3 (NC) (NC) GND3 GND2 RF Forward/reverse control F/R Source L OUT2 H OUT1 L OUT3 H OUT1 L OUT3 H OUT2 L OUT1 H OUT2 L OUT1 H OUT3 L ...
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... Hys.Amp + IN1 – + IN2 – + IN3 – V CTL Amp V CTL 40 k – CTL + V CREF LB1975 Duty – V CTL characteristics 100 CTL 1 Control voltage, V CTL — V S/S F/R FG1 FG2 LVSD Logic 31 k PWM OSC V COUT OSC GND1 GND2 GND3 ...
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... RF between this pin and 0 ground. Output current is limited to CC value set with V operation Output block power supply M 11 GND3 Output block ground LB1975 Pin function = 0.5 V /Rf. (Current limiter RF Equivalent circuit 2 A11953 3 ...
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... Output duty cycle control pin • V CTL Duty cycle 0 6.7 V • V CTL CTL Duty cycle is controlled by V • V CTL Duty cycle 100% LB1975 Pin function ≤ CTL 1 < V < CTL CTL CTL ≥ ...
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... Pin No. Pin name Pin voltage 0 CTL V 24 CREF voltage pin (2. – COUT CTL V – 0 LB1975 Pin function V CC amplifier internal reference amplifier output pin Equivalent circuit 100 A 200 23 200 A11962 No. 6087-8/12 A11961 ...
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... IC Description Direct PWM Drive This IC (LB1975) employs the direct PWM drive principle. Motor rotation speed is controlled by varying the output duty cycle according to an analog voltage input (V voltage. Compared to previous ICs using the PAM principle (such as the Sanyo LB1690), this allows simplification of the power supply circuitry ...
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... IC. Ensure that this does not happen through proper design of the V M supply or through use of a capacitor. Because the IC (LB1975) incorporates a shunt regulator, it can be used on a single power supply. In this case, supply V (6.3 typ.) to the V pin via an external NPN transistor and resistor. When not using the regulator, leave the V ...
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... V temperature characteristics are about –2 mV/° Pins Because NC pins are electrically open, they may be used for wiring purpose etc. LB1975 line must therefore be stabilized by connecting a capacitor of at least several µF and GND, to prevent exceeding V M and GND. COUT of the parasitic diode to calculate the temperature ...
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... 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 February, 2003. Specifications and information herein are subject to change without notice. LB1975 PS No. 6087-12/12 ...