Document
Ordering number : N4943
Monolithic Digital IC
LB1863M, 1869M
Two-Phase Unipolar Brushless Motor Driver Automatic Recovery Type Circuit in a Miniature Flat Package
Overview
The LB1863M and LB1869 (LB1669M) are 2-phase unipolar brushless motor drivers that are provided in a miniature flat package that contributes to end product miniaturization and supports automatic mounting. These products support the implementation of motor drive lock protection and automatic recovery circuits, and alarm specifications with a minimal number of external components.
Package Dimensions
unit: mm 3111-MFP14S
[LB1863M, 1869M]
Features and Functions
• Hall elements can be connected directly to the IC itself. • 1.5-A output current output transistors built in • Rotation detection function that provides a low-level output during motor drive and a high-level output when the motor is stopped • Motor lock protection and automatic recovery functions built in • Thermal shutdown circuit • Switching noise can be reduced with an external ceramic capacitor.
SANYO: MFP14S
Classification
Package System voltage 12 V 24 V MFP-10S LB1669M MFP-14S LB1869M* LB1863M*
Note: * The LB1869M and LB1863M are pin compatible so that the same printed circuit board can be used for both 12 V and 24 V products.
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter Maximum input current Output voltage Output current RD influx current RD voltage Allowable power dissipation Operating temperature Storage temperature Symbol ICC max VOUT IOUT IRD VRD Pd max Topr Tstg When mounted (on a 20 × 15 × 1.5-mm3 glass-epoxy printed circuit board) t ≤ 20 ms LB1863M LB1869M Conditions Ratings 200 –0.3 to +85 –0.3 to +60 1.5 10 30 800 –30 to +80 –55 to +150 Unit mA V V A mA V mW °C °C
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13097HA (OT) No. 4943-1/5
LB1863M, 1869M Allowable Operating Ranges 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 Symbol LB1863M Output voltage 1 VOR VO(SUS) VO(sat)1 VO(sat)2 VIN VOFF IBA VRD(sat) IC1 IC2 VTH1 VTH2 IRD = 5 mA 2.1 0.31 0.77 0.42 LB1869M LB1863M : IO = 0.1 A LB1869M : IO = 0.1 A IO = 0.5 A IO = 1.0 A ICC = 7.0 mA 6.4 –7 –250 0.1 3 0.44 0.8VIN 0.45VIN 0.3 3.9 0.59 0.83 0.48 Conditions Ratings min 80 60 65 40 0.95 1.15 6.7 0 1.2 1.5 7.0 7.0 typ max Unit V V V V V V V mA nA V µA µA V V
Output voltage 2
Output saturation voltage Input voltage Amplifier input offset voltage Amplifier input bias current RD output saturation voltage Capacitor discharge current
Comparator input threshold voltage
Pin Assignment
No. 4943-2/5
LB1863M, 1869M Equivalent Circuit, Block Diagram, and Sample Application
Sample Application Circuit
No. 4943-3/5
LB1863M, 1869M Sample Application Circuit Output Waveforms
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 RD L L H H
Design Documentation (See the application circuit diagram.) 1. Power-supply voltage (VIN pin) Since these miniature flat package products supply power to the Hall amplifier block and the control block from an internal parallel regulator, they operate with good stability with respect to kickback currents from the motor and variations in the power-supply voltage. They also provide an adequate ability to withstand surges. The resistor R1 between the VCC and VIN pins should be set up so that a current in the range ICC = 6 to 50 mA flows into the VIN pin in the fan motor power-supply voltage range. VIN has a typical value of 6.7 volts when ICC is 7 mA. The current flowing into VIN can be calculated with the following formula. VCC – VIN ICC = ————— ......................(1) R1 • Abnormal voltage considerations The maximum allowable current for the VIN pin is 200 mA. Therefore, the IC design allows it to withstand voltages up to the plus side abnormal voltage Vsurge give by formula (2). Vsurge = VIN + R1 × 200 mA......(2) 2. Hall input pin voltages (IN– and IN+ pins) The Hall element output voltages to the Hall element input pins must be in the range 0 to (VIN –1.5 V). The gain from the Hall input pins to the output pin is over 100 dB. The Hall input amplifier offset voltage is ±7 mV. This means that the Hall element output must be set up taking this ±7 mV offset into account. 3. Output transistors (OUT1 and OUT2 pins) Output current: IO = 1.5 A maximum Output saturation voltage: VOsat = 1.15V/1.0 A (typical) Applications should adopt one of the following three output protection techniques. If a capacitor is inserted between OUT and ground, use a capacitor with a value up to C = 10 µF, and design that value so that the kickback and reverse voltages do not exceed VOR. If a Zener diode is added, determine a value for the Zener voltage that is lower than VO(SUS). If radio-frequency noise is a problem, inse.