LB1946-E ON Semiconductor, LB1946-E Datasheet - Page 14

• Manufacturer Part Number: LB1946-E
• Description: 55T3131
• Manufacturer: ON Semiconductor
• Type: Stepper Motor Driverr

Specifications of LB1946-E

• Motor Type: Stepper
• No. Of Outputs: 2
• Output Current: 1.5A
• Driver Case Style: DIP
• No. Of Pins: 28
• Operating Temperature Range: -20°C To +85°C
• Svhc: No SVHC (20-Jun-2011)
• Base Number: 1946
• Rohs Compliant: Yes
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 10 V to 45 V
• Supply Current: 37 mA
• Mounting Style: Through Hole
• Package / Case: DIP-28
• Operating Temperature: - 20 C to + 85 C
• Supply Voltage (min): 4.5 V
• Lead Free Status / Rohs Status: Details

1. Switching OFF time and noise cancellation time calculations
The noise canceller time (Tn) and the switching off time (Toff) are set using the following formulas.
• When V CC =5V
• When V CC =3.3V
Noise canceller time (Tn)
Switching off time (Toff)
Noise canceller time (Tn)
Switching off time (Toff)
Notes on the CR pin setting (switching off time and noise canceller time)
Component value ranges
Tn ≈ C R ln {(1.5 - RI)/(4.0 - RI)} [s]
CR pin charge current: 1.25mA
Toff ≈ -C R ln (1.5/4.8) [s]
R: 5.6kΩ to 100kΩ
C: 470pF to 2000pF
Tn ≈ C R ln {(1.06 - RI)/(2.66 - RI)} [s]
CR pin charge current: 0.7mA
Toff ≈ -C R ln (1.06/3.1) [s]
One-shot multi-vibrator
blanking time circuit
Figure 2 CR Pin Internal Circuit Structure
CR pin
E1
LB1946
V CC line
No.7115-14/16