Document
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
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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
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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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