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Ordering number: EN3416A
Monolithic Digital IC
LB1662D, 1662M DC Fan Motor Drivers
Overview
The LB1662D, 1662M are 2-phase brushless motor drivers operated from 5 V power supply. Motor Lock protection and automatic return can be provided with a minimum number of external parts.
Package Dimensions
unit : mm
3098B-DIP10S
[LB1662D]
Features and Functions
. Designed to be operated from 5 V power supply, making reduced voltage. . stable operation possible at aelement possible. Direct connection to a Hall . Built-in output transistors with output current 1.5 A . Built-in rotation detect function (Drive mode: ``L'', Stop . mode: ``H'') lock protector and automatic return function . Built-in motor reduction pin With radio noise
SANYO : DIP10S
unit : mm
3097-MFP16FS
[LB1662M]
SANYO : MFP16FS
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
O1596HA(II)/7190TA(GTPS) No.3416-1/6
LB1662D, 1662M
Specifications
Absolute Maximum Ratings at Ta = 25 C
Parameter Maximum supply voltage Output voltage Output current RD flow-in current RD voltage Allowable power dissipation Symbol VIN max VOUT IOUT IRD VRD Pd max LB1662D LB1662M (Independent IC) LB1662M with Specified board* Operating temperature Storage temperature Topr Tstg Conditions Ratings 7 -0.3 to +85 1.5 10 50 1.2 0.9 1.2 -40 to +80 -55 to +125 Unit V V A mA V W W W C C
* Specified board (20 x 30 x 1.5 mm3 glass epoxy resin)
Allowable Operating Ranges at Ta = 25 C
Parameter Supply voltage range Common-mode input voltage range Symbol VIN VICM Conditions Ratings 3.8 to 6.0 0 to VIN -1.5 Unit V V
Electrical Characteristics at Ta = 25 C, VIN = 4.3 V
Parameter Output withstand voltage 1 Output withstand voltage 2 Output saturation voltage Symbol VOR VO(SUS) VO sat 1 VO sat 2 VO sat 3 IIN VOFF IBA VRD (sat) IC 1 IC 2 VTH 1 VTH 2 Conditions IO = 0.1 IO = 0.5 A IO = 1.0 A IO = 1.5 A, VIN = 4.8 V min 80 65 typ max Unit V V V V V mA mV nA V A A V V
VIN flow-in range Amp input offset voltage Amp input bias current RD output saturation voltage C flow-out current C discharge current Comparator input threshold voltage
1.4 -7 -250 IRD = 5 mA 1.5 0.21 0.67 0.34
0.95 1.15 1.4 2.5 0 0.1 2.8 0.38 0.7VIN 0.38VIN
1.2 1.5 2.0 3.7 7.0 0.2 4.1 0.61 0.73 0.42
No.3416-2/6
LB1662D, 1662M
Pin Assignments
Top view Allowable power dissipation, Pd max - W
Glass epoxy resin (LB1662M) (Independent IC)
(Independent IC)
Ambient temperature, Ta - C
Pin Functions
Pin No. 1 2 3 Pin name IN- IN+ C Function Input pins for hall element outputs. Common-mode input voltage range is 0 to VIN-1.5 V, offset voltage is 7 mV Capacitor pin (1 to 10 F) that forms automatic return circuit. When rotation is stopped due to overload, the pin voltage increases and output stops. After proper load adjustment, the output returns from ``stop'' mode to ``drive'' mode automatically. The lock detect time can be set by changing the capacitor constant. Output pins. The output transistor is Darlington connected. Connect either an external capacitor or an external Zener diode for output transistor protection. Ground pin. Base pins for Darlington connected output transistors. If radio noise is a problem, add a capacitor (0.01 to 0.1 F). Open collector output. Drive mode: ``L'', Stop mode: ``H'' Insert a limiting resistor between VCC and VIN and use the voltage applied between VIN and ground in a range from 3.8 to 6.0 V. In this case, the current consumption ICC at the VIN pin is 1.4 to 3.7 mA (when VIN = 4.3 V).
4 6 5 8 7 9 10
OUT1 OUT2 GND B1 B2 RD VIN
No.3416-3/6
LB1662D, 1662M
Truth Table
IN+ H L H L IN- L H L H C L L H H OUT1 H L H H OUT2 L H H H
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 F. 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 F to 0.1 F 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 F lock detection time about 1 seconds lock protection time (output ON) about 0.5 second (output OFF) about 3.5 seconds
Rotation
Lock
Ouptut on
Output off
Output on
Output off
Lock released
Rotation
No.3416-4/6
LB1662D, 1662M
1 2 3 When a fan is rotating, the capacitor is charge at 2.8 A (typ) and discharged through the C with pulses according to the rotational speed. When a fan is locked, no discharge occurs through the C and the C voltage rises, turning OFF the output at VTH1 (0.7 x VIN). When the output is turned OFF, discharge occurs through the C at 0.38 A (typ). If the lock is not released when the C voltage drops to VTH2 (0.38 x VIN), the capacitor is charged to VTH1 again. (At this moment, the output is turned ON.) These operations 2 and 3 repeated at a cycle of approximately tON : tOFF = 1 : 7 protect a motor. If the lock is released when the C voltage drops to VTH2, the output is turned ON, starting rotation.
4
(5) Rotation detect signal (RD pin) Open collector output (Drive mode: ``L'', Stop mode: ``H'') (6) Radio noise reducing (B1 and B2 pins) These are the base pins for Darlington connected output transistors. If radio noise is a problem, add a capacitor of approximately 0.01 to 0.1 F between B1 and B2, or 0.001 F to 0.01 F between OUT and B.
Block Diagram and Sample Application Circuit - 1
Control block
Low current circuit
0.47 to 10F
*1 Use (10,000 to 100,000 pF) if radio noise is a problem. *2 Use a Zener diode or capacitor for output stage protection.
No.3416-5/6
LB1662D, 1662M
Sample Application Circuit - 2
F
* When a ceramic capacitor oscillates, insert resistance in series with the capacitor.
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. Anyone purchasing any products described or contained herein for an above-mentioned use shall: 1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: 2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of October, 1996. Specifications and information herein are subject to change without notice.
No.3416-6/6

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