NJW4302 New Japan Radio Co.,Ltd, NJW4302 Datasheet
NJW4302
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NJW4302 Summary of contents
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... IC for precision applications. The NJW4302 consists of PWM driver, motor velocity control, FG(Frequency Generator) output, and voltage velocity integration circuit. The NJW4302 realizes stabilized velocity and it is suitable for printer, FAX, and other DC motor control systems. FEATURES Speed discriminator and PLL speed ...
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... NJW4302 PIN DESCRIPTION SYMBOL PIN No. DESCRIPTION H1+,H1- 33, 34 Hall input pins H2+,H2- 35, 36 Positive input terminal is defined as IN H3+,H3- 37, 38 Positive input is defined Output pins(for fixed current source ) Output pins(open collector sink outputs Duty control implement with PWM signal. ...
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... Open:Stop FR 22 Forward/reverse rotation control “L”:Forward “H”or Open:reverse BR 21 Brake control (short braking operation) “L”:Start “H”or Open:Brake CLK 23 External clock signal input 10kHz max Speed discriminator count switching N2 26 NJW4302 - 3 - ...
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... NJW4302 FUNCTIONAL DESCRIPTION 1. VCO circuit The variable range of PLL circuit is determined by two factors: VCO frequency determined by RC value connected to Pin 15 and Pin 16 and VCO loop filter constants. VCO frequency range must be within 160kH The typical external value is as follows: R=20kΩ,C=100pF. ...
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... Brake Switch NJW4302 uses a short brake method that turns on all phase of upper side transistors for braking. During the time, all lower side transistors are turned off. 8. VREG pin/VSH pin NJW4302 includes a regulator to generate for +5V regulated IC supply when the motor drive circuit is designed with a single power supply. The VREG pin and V+ pin compose a shunt regulator for 5V± ...
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... NJW4302 ABSOLUTE MAXIMUM RATING P ARAMETER Ma ximum supply voltage Ma ximum input current Output current Operating temperature Storage temperature Power dissipation ALLOWABLE MAXIMUM RANGES/Ta=25 C PARAMETER Input current range FG Schmitt output applied voltage FG Schmitt output current Lock detection output current Supply voltage - 6 - SYMBOL TEST CONDITION ...
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... TEST CONDITION (CR) (CR) R=75kΩ,C=1500pF SYMBOL TEST CONDITION V (RK (RK CHG I 2 CHG f C=0.068µF (RK) V (RK) SYMBOL TEST CONDITION (C) V (C) NJW4302 MIN. TYP. MAX 0.2 0.7 -20 -16 - 100 - - 0.5 MIN. TYP. MAX 1.5 - VCC-1 ...
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... NJW4302 CURRENT LIMITING OPERATION PARAMETER SYMBOL Limiter FG AMPLIFIER PARAMETER Input offset voltage Input bias current Output low-level voltage Output high-level voltage FG input sensitivity Schmitt amplifier for next stage Operating frequency range Open loop gain FGSO OUTPUT PARAMETER Output saturation voltage Output leak current ...
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... U(F/R) BR AMPLIFIER PARAMETER SYMBOL Input high-level voltage V IH(BR) Input low-level voltage V IL(BR) Hysteresis V IN(BR) Pull-Up resistance R U(BR) TEST CONDITION (INT) (INT) (INT) (INT) ) INT ) INT (INT) TEST CONDITION B(FIL) TEST CONDITION TEST CONDITION TEST CONDITION NJW4302 MIN. TYP. MAX. - -0 -0. 0.8 1 1.6 - 2.375 2.5 2.625 MIN. TYP. ...
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... NJW4302 CLK AMPLIFIER PARAMETER SYMBOL Input high-level voltage V Input low-level voltage V Hysteresis Pull-Up resistance R Input frequency N1 AMPLIFIER PARAMETER SYMBOL Input high-level voltage V Input low-level voltage V Hysteresis Pull-Up resistance R N2 AMPLIFIER PARAMETER SYMBOL Input high-level voltage V Input low-level voltage V Hysteresis Pull-Up resistance ...
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... S/S TERMINAL High or Open Stop Low Start BRAKE TERMINAL High or Open Brake Low Release N2 NUMBER OF COUNTS 128 512 256 1024 F/R NJW4302 OUTPUTS Source Sink ...
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... C 47u VSH 75k C 1 1500p C 2 0.047u R 2 20k C 3 100p - PVCC VCC VREG DGND AGND NJW4302 QFP44 VSH CR CROCK R C 220p R 27k 18k 2.4M 0.47u 0. 0.22u 150k ...
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... TYPICAL CHARACTERISTICS NJW4302 - 13 - ...
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... NJW4302 TYPICAL CHARACTERISTICS (Ta=25degC,With standard device ...
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... FG+ input is biased internally to the half level of Vcc. This DC bias voltage is also used to RESET the internal logic circuit. For stable RESET operation capacitor, requires a 0.1 uF capacitor connected to FG+ terminal. RESET is enable a during 0V to 1.25V of the voltage at the FG+. FG Sensor Amplifier Application Circuit 0.47u 2k 0.1u 1000p 100k FGO FG- FG+ for Internal logic NJW4302 NJW4302 FGS - 15 - ...
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... Power supply generating from Vref To supply for NJM4302, Hall sensor and Power stage, QR1 should have 100mA current capacity. It needs 47 microfarad capacitor NJW4302 for ripple filtering. Hall sensor biasing Hall biasing is determined by Hall signal amplitude. Hall signal amplitude must be larger than input sensitivity of NJW4302 ...
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... Re-circulating diodes is needed on between collector and emitter of output transistor. R11 is a current sensing resistor and settled by following R11 I O When VRF is sensing voltage sensing current. Take care of power dissipation of R11, also about 20kHz, it could reduce audible noise. PWM 2 NJW4302 The - 17 - ...
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... NJW4302 Recirculation Diodes Recirculation diodes are recommend to use Shottkey-burrier type. Forward voltage “VF” and reverse returning time “trr” are contributed for power dissipation [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The ...