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Ordering number: EN3513A
Monolithic Digital IC
LB1669, 1669M 2-Phase Unipolar Brushless Motor Driver
Overview
The LB1669, 1669M are 2-phase uniploar brushless motor drivers. They make it possible to configure motor lock protection and automatic recovery circuits with few extenal components.
Package Dimensions
unit : mm
3098A-DIP10S
[LB1669]
Features and Functions
. Hall element direct connection possible . Output transistor with 1.5 A output current built in . Rotation detect function (Drive mode: ``L'', Stop mode: . ``H'') built in Motor lock protection and automatic recovery functions built . in shutdown circuit built in . Thermal and MFP-10S packages mean small mounting DIP-10S . surfaces. with LB1663, so can replace 12 V types. Pin compatible
SANYO : DIP10S
unit : mm
3086A-MFP10S
[LB1669M]
SANYO : MFP10S
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
D3096HA(II)/7120TA(GTPS) No.3513-1/5
LB1669, 1669M
Specifications
Absolute Maximum Ratings at Ta = 25 C
Parameter Maximum input current Output applied voltage Output current RD flow-in current RD applied voltage Allowable power dissipation Operating temperature Storage temperature Symbol ICC max VOUT IOUT IRD VRD LB1669: Independent IC Pd max Topr Tstg LB 1669M: Mounted on 20 x 15 x 1.5 mm3 glass epoxy board t % 20 ms Conditions Ratings 200 -0.3 to +60 1.5 10 30 1.2 800 -30 to +80 -55 to +125 Unit mA V A mA V W mW C C
Allowable Operating Conditions at Ta = 25 C
Parameter Input current range Common-mode input voltage range Symbol ICC VICM Conditions Ratings 6.0 to 50 0 to VIN-1.5 Unit mA V
Electrical Characteristics at Ta = 25 C, ICC = 10 mA
Parameter Output withstand voltage 1 Output withstand voltage 2 Output saturation voltage VIN voltage Amp input offset voltage Amp input bias current RD output saturation voltage C flow-out current C discharge current Comparator input threshold voltage Symbol VOR VO(sus) VO sat1 VO sat2 VIN VOFF IBA VRD(sat) IC1 IC2 VTH1 VTH2 Conditions IO = 0.1 A IO = 0.5 A IO = 1.0 A ICC = 7.0 mA min 60 40 typ max Unit V V V V V mV nA V A A V V
6.4 -7 -250 2.1 0.31 0.77 0.42
0.95 1.15 6.7 0 0.1 3 0.44 0.8VIN 0.45VIN
1.2 1.5 7.0 7.0 0.2 3.9 0.59 0.83 0.48
IRD = 5 mA
Allowable power dissipation, Pd max - W
Allowable power dissipation, Pd max - W
Pd max - Ta
Pd max - Ta LB1669M
Mounted on 20 x 15 x 1.5 mm3 Glass epoxy board
Independent IC
Ambient temperature, Ta - C
Ambient temperature, Ta - C
No.3513-2/5
LB1669, 1669M
Pin Assignments
Top view
Top view
Equivalent Circuit Block Diagram and Sample Application Circuit 1
VIN
Thermal shutdown
Fixed current circuit 1 to 10
0.47 to 10
Note * 1: If radio noise is a problem, 0.01 to 0.1F * 2: Use a low-leak capacitor.
Unit (capacitance: F)
Sample Application Circuit 2
*
* C2 and C3 are ceramic
capacitors If the output oscillates, insert resistance in series with the capacitor. No.3513-3/5
LB1669, 1669M
Sample Application Circuit 2 Output Waveform Diagram
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
Design Notes (See Sample Application Circuits.)
(1) Supply Voltage (VIN pin) The LB1669 series have the internal parallel regulator which supplies power to the Hall amplifier circuit and the control block. Therefore, the driver ICs are not affected by power source fluctuations and kickbacks from the motor. They maintain the stable operations even if noise signals such as surge are generated. Set the resistance R1 between VCC and VIN so that the ICC current of 6 mA to 50 mA can flow into the VIN pin within the supply voltage range of a fan motor. VIN is 6.7 V typ at ICC = 7 mA. The current flowing into VIN is calculated using the equation shown below. . . . . . . . (1) R1 Consideration given to surge voltage The maximum allowable current at VIN pin is 200 mA, so the withstand voltage level is designed as follows. Vsurge = VIN + R1 x 200 mA . . . . . . (2) ICC = VCC - VIN
.
(2) Hall input pin voltage (IN- and IN+ pins) IN- and IN+ are input pins for the Hall element output. Set 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 amplifier 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 LB1669 requires one of the three types of output protection. 1 When external capacitors are connected between OUT and GND, the capacitance should not exceed 10 F. Use capacitance that will hold kickback voltage and back voltage to 60 V or less. 2 When external Zener diodes are connected, use one that will have a cutoff voltage of 40 V or less. If radio noise is a problem, insert a capacitor of 0.01 to 0.1F between B1 and B2. 3 When external capacitors are connected between OUT and B, use one that will hold kickback voltage to 40 V or less. If it oscillates, insert resistance in series with the capacitor.
No.3513-4/5
LB1669, 1669M
(4) Output protection function (C pin) Capacitor pin used in forming an automatic recovery circuit. If rotation is stopped due to overload, the pin voltage level 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. For 1 F lock detection time about 2 seconds lock protection time (output ON) about 1 second (output OFF) about 6 seconds
Rotation Lock
Output on
Output off
Output on
Output off
Lock released
Rotation
Automatic Recovery Circuit C Pin Voltage
1 When a fan is rotating, the capacitor is charged at 3 A (typ) and discharged through the C with pulses according to the rotational speed. 2 When a fan is locked, no discharge occurs through the C and the C voltage rises, turning OFF the output at 0.8 x VIN. 3 When the output is turned OFF, discharge occurs through the C at 0.44 A (typ). If the lock is not released when the C voltage drops to VTH2, the capacitor is charged to VTH1 again. (At this moment, the output is turned ON.) These operations 2 and 3 are repeated at a cycle of approximately ton : toff = 1 : 6 to protect the motor. 4 If the lock is released when the C voltage drops to VTH2, the output is turned ON, starting rotation. (5) Rotation detect signal (RD pin) Open collector output (Drive mode: ``L'', Stop mode: ``H'') (6) Radio noise reducing (pins B1 and B2) These are the base pins for Darlington connected output transistors. If radio noise is a problem, add a capacitor of 0.01 to 0.1F or less. (7) Thermal shutdown function Shutdown the driver output in case of coil short-circuiting and abnormal IC heating.
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 December, 1996. Specifications and information herein are subject to change without notice.
No.3513-5/5

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