Samsung SCX-1100 Service Manual page 92

2-2. Driver Spec.
1) Absolute Maximum Rating
Name Description
Vout DC Motor Driver Output Voltage
Iout DC Motor Driver Output Current
2) DC Specification
Name Description
I peak Peak DC Motor Driver Output Current
I out DC Motor Driver Sustaining Current
3) AC/Transient Specifications
Name Description
f PWM frequency
PWM
4) Truth Table
DIR_DCM
0
0
1
1
3. LF(Line Feed) MOTOR drive circuit description
3-1. LF MOTOR
• MOTOR TYPE : 2-2 Bi-polar Stepper Motor
• Drive Voltage : +30V
• Spherical line resistance : 5Ω ± 7%
• Driver IC : Thunderbolt
3-2. LF Motor Operation
LF Motor(Stepper Motor) drive uses the first Motor Driver(MD1) in Thunderbolt ASIC, and Drive Pulse is output from 4
terminals of A+, A-, B+,and B-. two H letter type Drivers. Drive Pulse controls size and flow direction of current(A+ =>
A- or A- => A+) according to bit7-bit No.13 signals among 13Bit Serial Port Inputs("TBDO" Signal) coming into
Thunderbolt ASIC transmitted from Jupiter-III. This Driver is driven by VBULK power source (+30V), and on terms of
motor stall not being generated, it is designed to supply current of 600mA, maximum 700A current to each phase of
motor.
Samsung Electronics
Condition
Ta = 25C
PWM #NAME?
0 On
1 Off
0 On
1 Off
- This Document can not be used without Samsung's authorization -
Condition Min
Condition Min
Not Stalled
On Time=100ms 1.6
Min Nom
19 20
#NAME? #NAME?
Off On
On On
Off On
Off Off
CIRCUIT DESCRIPTION
Max Units
42 Volts
2.4 A
Max Units
0.75A Volts
2.4 A
Max Units
21 KHz
#NAME?
Off
Off
Off
On
Repair Manual
3-33