 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| NJU7332 Preliminary Single-phase DC Brushless Motor Driver IC s PACKAGE OUTLINE s 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 amplifiers and feedback resistors are optimized to achieve low-noise motor operation. NJU7332 adopt a very small FFP package, therefore it is suitable for micro motor applications. NJU7332PB1 s 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 FFP12 (2x2x0.85mm) s PIN CONFIGURATIONS VDD VDD VDD OUT B OUT A OUT B Top view OUT A IN+ 12pin 1pin VSS VSS IN- IN- Ver.2003-03-19 -1- NJU7332 Preliminary s ABUSOLUTE MAXIMUM RATINGS PARAMETER RATINGS Supply Voltage +7.0 Input Voltage -0.3 VDD+0.3 Operating Temperature Range -40 +85 Storage Temperature Range -50 +150 Power Dissipation 300 1) When mounted on a grass epoxy board. s RECOMMENDED OPERATING CONDITIONS VDD=2.4V5.5V (Ta=25C) NOTE SYNBOL(unit) VDD (V) VID(V) Topr (C) Tstg (C) PD (mW) 1) s ELECTRICAL CHARACTERISTICS PARAMETER SYSMBOL Operating Current IDD Input Offset Voltage Input Common Mode Voltage Range Maximum Output Voltage Range Feedback Resistance Open Loop Gain VIO VICM VOM RF Av CONDITION Io=+100mA Io= -100mA - MIN. -10 0.44.0 4.70 22.0 - (V+=5V, Ta=25C) TYP. MAX. 3.0 4.80 0.20 27.5 80 4.0 -10 0.30 UNIT mA mV V V k 33.0 dB -2- Ver.2003-03-19 NJU7332 s TYPICAL CHARACTERISTICS VDD vs. ICC IN-=VDD, IN+=0V, VSS=0V Preliminary 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 0 1 2 3 4 VDD(V) 5 6 7 8 ICC(mA) VDD-VOM(L level) Iout=100mA, IN-=0V, IN+=VDD/2, VSS=0V 200 180 160 140 VDD(mV) 120 100 80 60 40 20 0 0 1 2 3 4 VDD(V) 5 6 7 8 Io-Vom( level) VDD=5V, IN-=0V, IN+=VDD/2, VSS=0V 2 1.8 1.6 1.4 Vo(V) 1.2 1 0.8 0.6 0.4 0.2 0 0 200 400 600 Io(mA) 800 1000 1200 Ver.2003-03-19 -3- NJU7332 Preliminary s 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( 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.2003-03-19 NJU7332 s APPLICATION NOTE The NJU7332 is a single-phase DC brushless motor driver IC featuring CMOS process. It is suitable for fan motor drivers for a small equipment such as the note personal computers. [Application Circuit Example] V+ D1 GND R3 R1 VDD Hall element IN+ INR2 Ct C2 VSS FG FG out OUTA Motor C1 Preliminary OUTB NJU7332 [Design Notes] Above application example is designed for 5V operation with motor current of 100mA. It uses the following components: Hall Elements: HW101A (AKE) 1. Selection of C1 and D1: C1 is used for a noise reduction purpose. A typical value is 0.1uF. Optimize the value in actual operating conditions if necessary. D1 is a diode for protection against reverse voltage supply. Silicon rectifier diode (WO3C, 10D1 and equivalent) is appropriate. 2. Design of hall element bias resistance (R1 and R2) Hall amplifier is a differential amplifier with hysteresis characteristics (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 voltage 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 selected 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 5 VDD = = 1k Ihbias 5 x 10 -3 follows: The output voltage of hall elements is influenced by the bias current and magnetic flux density of hall elements. The optimum input voltage of NJU7332 is 100mVp-p and higher. With such input voltage, the highest efficiency can be obtained. The specifications on this data book are only given for information, without any guarantee as regards either mistakes or omissions. The application circuit in this data book 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.2003-03-19 -5- |
Price & Availability of NJU7332
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |