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LB1332D Datasheet(Fiches technique) 4 Page - Sanyo Semicon Device

Numéro de pièce LB1332D
Description  DC Fan Motor Drivers
Télécharger  6 Pages
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Fabricant  SANYO [Sanyo Semicon Device]
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Truth Table
Usage Notes
(See the Sample Application Circuits.)
(1) Supply voltage (VIN pin)
Use these ICs with the voltage applied between VIN and ground in the range from 3.8 to 6.0 V. The current consumption,
ICC, at the VIN pin is from 1.4 to 3.7 mA (when VIN = 4.3 V). Insert diode D1 to keep coil kickback out of the power line.
This diode also prevents breakdown due to reverse connections. Also, inserting R1 limits the reverse connection current
flowing into ground and VIN. These ICs have a reverse connection withstand current, ICC = 200 mA. Check R1 around the
range from 50 to 200
(2) Hall input pin voltage (IN– and IN+ pins)
Set the voltage levels of the input pin for the Hall element output and the Hall element output voltage to within the range of
0 V to VIN−1.5 V.
The gain between the Hall input pin and the output pin is 100 dB or greater. The offset voltage of the Hall input amp is
±7 mV. Therefore, the Hall element output must be set with the offset voltage (±7 mV) considered.
(3) Output transistors (OUT1 and OUT2 pins)
Output current IO = 1.5 A max.
Output saturation voltage VO sat = 1.15 V/1.0 A (typ.)
The LB1662D, 1662M requires one of the three types of output protection.
1 When external capacitors are connected between OUT and ground, the capacitance should not exceed 10 µF. Use
capacitance that will hold kickback voltage and back voltage to 80 V or less.
2 When external Zener diodes are connected, use one that will have a cutoff voltage of 65 V or less. If radio noise is a
problem, insert a 0.01 µF to 0.1 µF capacitor between B1 and B2.
3 When external capacitors are connected between OUT and B, use one that will hold kickback voltage to 65 V or less. If
it oscillates, insert resistance in series with the capacitor.
(4) Output protection function (C pin)
Capacitor pin used in forming an automatic return circuit.
If rotation is stopped due to overload, the pin voltage increases and then forces the output to become inactive. In this case,
after proper load adjustment, the output returns to the ‘drive’ mode from the ‘stop’ mode automatically. By changing the
capacitor value, the lock detect time period can be set.
Automatic return circuit C pin voltage
For 1 µF
lock detection time about 1 seconds
lock protection time (output ON) about 0.5 second
(output OFF) about 3.5 seconds
Ouptut on
Output off
Output off
Lock released
LB1662D, 1662M

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