LB1847_12 Datasheet, PDF (1/15 Pages) Sanyo Semicon Device – Monolithic Digital IC PWM Current Control Type Stepping Motor Driver

Ordering number : EN5982A
LB1847
Monolithic Digital IC
PWM Current Control Type
Stepping Motor Driver
Overview
The LB1847 is a driver IC for stepping motors with PWM current control bipolar drive (fixed OFF time). A special feature
of this IC is that VREF voltage is constant while the current can be set in 15 steps, allowing drive of motors ranging from
1-2 phase exciter types to 4W 1-2 phase exciter types. The current decay pattern can also be selected (SLOW DECAY,
FAST DECAY, MIX DECAY) to increase the decay of regenerative current at chopping OFF, thereby improving response
characteristics. This is especially useful for carriage and paper feed stepping motors in printers and similar applications
where high-precision control and low vibrations are required.
Features
• PWM current control (fixed OFF time)
• Load current digital selector (1-2, W1-2, 2W1-2, 4W1-2 phase exciter drive possible)
• Selectable current decay pattern (SLOW DECAY, FAST DECAY, MIX DECAY)
• Simultaneous ON prevention function (feed-through current prevention)
• Noise canceler
• Built-in thermal shutdown circuit
• Built-in logic low-voltage OFF circuit
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Motor supply voltage
Output peek current
Output continuous current
Logic supply voltage
Logic input voltage range
Emitter output voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VBB
IO peak
IO max
VCC
VIN
VE
Pd max
Topr
Tstg
tW = 20µs
Conditions
Independent IC
With infinitely large heat sink
Ratings
Unit
50
V
1.75
A
1.5
A
7.0
A
-0.3 to VCC
V
1.0
V
3.0
W
20
W
-20 to +85
°C
-55 to +150
°C
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Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
21809 MS / 11499RM(KI) No.5982-1/15