Monolithic Digital LB1846M, 1848M Low-Voltage/Low Saturation

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Monolithic Digital LB1846M, 1848M Low-Voltage/Low Saturation

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Ordering number EN5339
Monolithic Digital
LB1846M, 1848M
Low-Voltage/Low Saturation Voltage Type Bidirectional Motor Driver
Overview
LB1846M LB1848M 2-channel low-voltage, saturation voltage type bidirectional motor driver that optimal 2-phase stepping motor drivers printers, floppy disk drives, cameras other portable equipment. output circuits bipolar type, with transistors upper side transistors lower side, they achieve saturation output power characteristics despite being provided miniature package. Both these products directly control motor from signals from microcontroller. LB1846M optimal phase excitation drive 2-phase stepping motors using 4-input logic (IN1, IN2, IN3, IN4) LB1848M optimal 2-phase excitation drive 2-phase stepping motors using 3-input logic (ENA, IN1, IN2). Another point that these include built-in thermal shutdown circuits that scorching burning prevented advance even outputs shorted. Additionally, MFP-10S miniature package used supports reduced-space mounting.
Package Dimensions
unit: 3086A-MFP10S
[LB1846M, 1848M]
SANYO: MFP10S
Features
Optimal phase excitation drive 2-phase stepping motors (LB1846M) Optimal phase excitation drive 2-phase stepping motors (LB1848M) saturation voltage. VO(sat) 0.55 typical Standby current: zero Thermal shutdown circuit Miniature package: MFP-10S (6.5 Through-current prevention circuit (LB1848M only) "Soft off" function that reduces power supply line noise when switching from drive standby modes. (Requires external capacitor.) (LB1848M only) limitations magnitude relationship between power supply voltage (VCC) input voltage (VIN)
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, Chome, Ueno, Taito-ku, TOKYO, JAPAN
O3096HA (OT) 5339-1/6
LB1846M, 1848M
Specifications
Absolute Maximum Ratings 25°C
Parameter Maximum supply voltage Output voltage Input voltage Ground outflow current Allowable power dissipation Operating temperature Storage temperature Symbol VOUT IGND max1 max2 Topr Tstg channel Independent When mounted* Conditions Ratings -0.3 +8.0 -0.3 +8.0 +150 Unit
Note: specified circuit board 114.3 76.2 1.5-mm glass-epoxy printed circuit board)
Allowable Operating Ranges 25°C
Parameter Supply voltage Input high-level voltage Input low-level voltage Symbol Conditions Ratings -0.3 +0.7 Unit
Electrical Characteristics 25°C,
Parameter [LB1846M] Current drain ICC0 ICC1 VOUT1 Output saturation voltage VOUT2 Input current [Spark Killer Diode] Reverse current Forward voltage [LB1848M] Current drain ICC0 ICC1 VOUT1 Output saturation voltage VOUT2 Input current Input current [Spark Killer Diode] Reverse current Forward voltage IS(leak) IOUT IENA IOUT IOUT 0.27 0.55 IS(leak) IOUT IN1, IN1, IN2, IOUT IOUT 0.27 0.55 Symbol Conditions Ratings Unit
Note: thermal shutdown circuit function values design guarantees, tested.
Assignments
5339-2/6
LB1846M, 1848M Block Diagrams [LB1846M]
[LB1848M]
Note: When "soft off" function used, capacitor must connected pin. this function used, this must left open with absolutely signals lines connected.
Notes Wiring Lines Since large currents flow ground lines, oscillations occur these lines. following points should observed such oscillations occur. Lower line impedances making them shorter thicker. Attach capacitors close controller (CPU) mounted separate printed circuit board, insert series resistors about between controller outputs this
5339-3/6
LB1846M, 1848M Truth Tables [LB1846M]
OUT1 OUT2 OUT3 OUT4 phase excitation Notes Standby
logic output first high-level input produced.
Note: indicates "don't care" input. high levels (H/H) input IN1/IN2 pins with timing shown figure below, then input that arrived later will ignored will function though combination applied IN1/IN2 pins. Similarly, timing shown results combination IN1/IN2 pins.
[LB1848M]
OUT1 OUT2 OUT3 OUT4 2-phase excitation Notes Standby
Note: indicates "don't care" input.
5339-4/6
LB1846M, 1848M ("Soft Off" Function) Operation [LB1848M only] soft function reduces power supply line noise kickback current generated when stepping motor drive mode switched from drive standby. "soft off" function provided this operates when capacitor (0.001 0.01 connected between ground. (Leave open disable soft function.) waveforms each shown below.
Timing Chart Stepping Motor 2-Phase Excitation
5339-5/6
LB1846M, 1848M
products described contained herein intended surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment like, failure which directly indirectly cause injury, death property loss. Anyone purchasing products described contained herein above-mentioned shall: Accept full responsibility indemnify defend SANYO ELECTRIC CO., LTD., affiliates, subsidiaries distributors their officers employees, jointly severally, against claims litigation damages, cost expenses associated with such use: impose responsibility fault negligence which cited such claim litigation SANYO ELECTRIC CO., LTD., affiliates, subsidiaries distributors their officers employees jointly severally. Information (including circuit diagrams circuit parameters) herein example only; guaranteed volume production. SANYO believes information herein accurate reliable, guarantees made implied regarding infringements intellectual property rights other rights third parties. This catalog provides information October, 1996. Specifications information herein subject change without notice. 5539-6/6

Monolithic Digital LB1846M, 1848M Low-Voltage/Low Saturation

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