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NJU7332 Dataheets PDF



Part Number NJU7332
Manufacturers JRC
Logo JRC
Description Single-phase DC Brushless Motor Driver IC
Datasheet NJU7332 DatasheetNJU7332 Datasheet (PDF)

NJU7332 www.DataSheet4U.com Single-phase DC Brushless Motor Driver IC GENERAL DESCRIPTION The NJU7332 is a single-phase DC brushless motor driver IC for very small fan-motor application. It features MOS-FET driver circuit for better saturation characteristics. Slew late of amplifers and feedback resistors are optimized to achieve low-noise motor operation. The NJU7332 adopt a very small FFP package, therefore it is suitable for micro motor applications. PACKAGE OUTLINE NJU7332PB1 FEATURES Sin.

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NJU7332 www.DataSheet4U.com Single-phase DC Brushless Motor Driver IC GENERAL DESCRIPTION The NJU7332 is a single-phase DC brushless motor driver IC for very small fan-motor application. It features MOS-FET driver circuit for better saturation characteristics. Slew late of amplifers and feedback resistors are optimized to achieve low-noise motor operation. The NJU7332 adopt a very small FFP package, therefore it is suitable for micro motor applications. PACKAGE OUTLINE NJU7332PB1 FEATURES Single supply Operating Voltage VDD 2.4 5.5V Low Operating Current Low Saturation Output Voltage Vsat= 0.2V @Io= 100mA C-MOS Technology Package Outline TVSP8/FFP12 (2mm 2mm 0.85mm) BLOCK DIAGRAM PIN CONFIGURATIONS VDD VDD VDD 1 RF RF 8 OUT B 2 3 4 A – + B + – 7 OUT B Top view OUTA 6 5 IN+ 12pin 1pin VSS IN- GND VSS IN- FFP12 TVSP8 Ver.2007-02-20 -1- NJU7332 www.DataSheet4U.com ABUSOLYTE MAXIMUM RATINGS PARAMETER RATINGS Supply Voltage Input Voltage +7.0 -0.3 VDD+0.3 SYMBOL (unit) VDD (V) VID(V) Topr ( ) Tstg ( ) PD(mW) (Ta=25 ) NOTE Operating Tempereture -40 +85 Range Storage Temperature -50 +150 Range Power Dissipation 300 (*1) When mounted on a glass epoxy board. RECOMMENDED OPARATING CONDITIONS VDD 2.4V 5.5V (*1) ERECTRICAL CHARACTERISTICS PARAMETER SYMBOL Operating Current Input Offset Voltage Input Common Mode Voltage Range Maximum Output Voltage Range Feedback Resistance Open Loop Gain I DD VIO VICM VOM CONDITION Io=+100mA Io=-100mA MIN. -15.0 0.4 4.0 4.70 22.0 - (Ta=25 , VDD= V) TYP. MAX. UNIT. 3.0 4.80 0.20 27.5 80 4.0 15.0 V 0.30 33.0 kΩ dB mA mV V RF Av - -2- Ver.2007-02-20 NJU7332 www.DataSheet4U.com TYPICAL CHARACTERISTICS VDD vs. ICC IN-=VDD, IN+=0V, VSS=0V 2 1.75 1.5 ICC(mA) 1.25 1 0.75 0.5 0.25 0 0 1 2 3 4 VDD(V) 5 6 7 8 VDD-VOM(L level) Iout=100mA, IN-=0V, IN+=VDD/2, VSS=0V 200 175 150 125 100 75 50 25 0 0 1 2 3 4 VDD(V) 5 6 7 8 VOM(mV) Io-VOM(L level) VDD=5V, IN-=0V, IN+=VDD/2, VSS=0V 2 1.75 1.5 1.25 1 0.75 0.5 0.25 0 0 200 400 600 Io(mA) 800 1000 1200 Ver.2007-02-20 VOM(V) -3- NJU7332 www.DataSheet4U.com TYPICAL CHARACTERISTICS VDD-VOM(H level) Iout=100mA, IN-=0V, IN+=VDD/2, VSS=0V 200 175 150 VOM(mV) 125 100 75 50 25 0 0 1 2 3 4 VDD(V) 5 6 7 8 Io-VOM(H level) VDD=5V, IN-=0V, IN+=VDD/2, VSS=0V 1.8 1.6 1.4 1.2 VOM(V) 1 0.8 0.6 0.4 0.2 0 0 200 400 600 Io(mA) 800 1000 1200 -4- Ver.2007-02-20 NJU7332 www.DataSheet4U.com APPLICATION NOTE The NJU7332 is a signal-phase DC brushless motor driver IC featuring CMOS process. It is suitable for fan drivers for a small equipment such as the note personal computers. [Application Circuit Example] V+ D1 GND C1 R1 Hall element VDD IN+ INR2 OUTA Motor OUTB NJU7332 VSS [Design Notes] Above application example is designed for 5V operation with motor current of 100mA, it uses the following components: Hall Elements: HW101A(AKE) SECTION of C1 and D1: C1 used for a noise reduction purpose. A typical value is 0.1µF. Optimize the value in actual operating condition if necessary. D1 is a diode for protection against reverse voltage supply. Silicon rectifier diode(WO3C, 10D1, and equivalent) is appropriate. Design of hall element bias resistance (R1 and R2) Hall amplifier is a differential with hysteresis characterics(24mV typical). The common-mode input voltage is between 0.4V and VDD-1V and the input signal must be within the range. Non-excitation hall bias is to be set at a half of VDD for effective use of common-mode input voltage range. Therefore the same value of hall bias resistors is seletcted for R1 and R2. Given that the bias current is set to be 5mA by HW101A datasheet, R1 and R2 can be determined as R1 + R 2 + Rin = R1 = R 2 = 300 Ω VDD 5 = = 1kΩ Ihbias 5 × 10 −3 follows: The output voltage of hall elements is influnenced by the bias current and magnetic flux density of hall elements. The optimum input voltage of the NJU7332 is 100mVp-p and higher. With such input voltage, the highest efficiency can be obtained. [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. Ver.2007-02-20 -5- .


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