LB1847-E SANYO, LB1847-E Datasheet - Page 12

• Manufacturer Part Number: LB1847-E
• Description: IC MTR DRVR BPLR STEP DIP28H
• Manufacturer: SANYO

Specifications of LB1847-E

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Voltage - Load: 10 V ~ 45 V
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 28-DIP (0.550", 12.7mm) Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Other names: 869-1250

Sample Application Circuit
Notes on Usage
1. External diodes
2. VREF pin
3. GND pin
Because this IC uses upper-side transistor switching in SLOW DECAY mode and dual-side transistor switching in
FAST DECAY mode, it requires external diodes between the OUT pins and ground, for the regenerative current
during switching OFF. Use Schottky barrier diodes with low VF.
Because the VREF pin serves for input of the set current reference voltage, precautions against noise must be taken.
The input voltage range is 0 to 3.0V.
The ground circuit for this IC must be designed so as to allow for high-current switching. Blocks where high current
flows must use low-impedance patterns and must be removed from small-signal lines. Especially the ground
connection for the sensing resistor RE at pin E, and the ground connection for the Schottky barrier diodes should be in
close proximity to the IC ground.
The capacitors between V CC and ground, and V BB and ground should be placed close to the V CC and V BB pins,
respectively.
1.5V to 4.0V
voltage setting
1.5V
10µF
28
1
5V
15kΩ
27
2
470pF
26
3
25
4
0.51Ω
24
5
SBD
23
6
LB1847
L
LB1847
22
7
SBD
21
8
Logic input
SBD
L
20
9
SBD
19
10
0.51Ω
18
11
15kΩ
17
12
16
13
470pF
15
14
42V
47µF
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