NJM#3517D2 NJR, NJM#3517D2 Datasheet - Page 7

• Manufacturer Part Number: NJM#3517D2
• Description: Motor / Motion / Ignition Controllers & Drivers Stepper
• Manufacturer: NJR
• Type: Stepper Motor Controllerr

Specifications of NJM#3517D2

• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 5 V
• Supply Current: 60 mA
• Mounting Style: Through Hole
• Package / Case: DIP-16
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

For figures 3 and 4. Note that “Larger than …” is normally the vice versa of
“Smaller than … .”
PURPOSE OF EXTERNAL COMPONENTS
Component Purpose
D1, D2
D3 … D6
R1
R2, R3
R4 … R7
R8, R9
R10, R11
R12 … R15 External transistor base
RT, CT
C1, C2
C3 … C5
Q1, Q2
Q3, Q4
Q5 … Q8
Base discharge resistor R = 240ohm
External transistor base
driver
discharge.
Passes low power to
motor and prevents
high power from
shorting through low
power supply
Inductive current
supressor
Base drive current
limitter
ØA, ØB pull-up
resistors
Limit max. motor
current. Resistors may
be omitted. (Check
motor specifications
first.)
Sets L A and L B on time
when triggered by
STEP.
Stores the doubling
voltage.
Filtering of supply-
voltage ripple and take-
up of energy feedback
from D3 … D6
Activation transistor of
voltage doubling.
Charging of voltage
doubling capacitor
Motor current drive
transistor.
R =
V Rated >V
Value
I f = 1A
1N4001, UF4001
I f = 1A
t rr = 100nS
e.g.
R = 20ohm
P = R1
P = R1
R =
P > (I 4 )
Check hfe.
R = 5kohm @ pull-up
voltage = 5V.
P =
R =
P > V be • I 12
R = 47kohm, C = 10nf
P < 250mW
C = 100µ F
V C
C
I C as motor requires.
I C as motor requires.
PNP power trans.
V mm -V Motor -V CESat
V be
10
V mm - V be - V ce
I 12
(V CC )
I 4 -
45V
BYV27
UF4001
RGPP10G
RGPP30D
µ F
R
(
(
2
I
=
Motor max
• R4
(
mm
R 1 + R 2
R 1 + R 2
15
2
V mm
V mm
R12
V be
,V ss or V cc Increases price
)
)
)
2
2
I C =
(
Less stress on ØA,
ØB output
transistors
Increases effective
on-time during
voltage doubling
Larger than value Smaller than value
Increases price
Increases price
Slows down turn-
off time. Voltage
at anode might
exceed voltage
breakdown
Slows down Q1’s
turn-on and Q4’s
turn-off time.
Slows down Q1’s
turn-off and Q4’s
turn-on time.
Decreases ext.
transistor I C max.
Lowers 3517
power dissipation.
Increases noise
sensitivity, worse
logic-level
definition
Decreases motor
current.
Slows down
external transistor
turn-off time.
Lowers 3517
power dissipation
Increases on time. Decreases on time.
Increases price,
better filtering,
decreases risk of
IC breakdown
Increases price.
Increases max
current capability.
f Step
(V mm - V f -V CE ) • C1
1
- 0.55 • R T • C T
Decreases max
current capability
Decreases current
turn-off capability
Speeds up turn-
off time.
Speeds up Q1’s
turn-on and Q4’s
turn-off time.
Speeds up Q1’s
turn-off and Q4’s
turn-on time.
Increases ext.
transistor I C max.
Increases 3517
power dissipation.
Increases noise
immunity, better
logic-level
definition.
Stress on ØA, ØB
output
transistors.
Increases motor
current.
Speeds up
external transistor
turn-off time.
Increases 3517
power dissipation
Decreases
effective on-time
during voltage
doubling.
Decreases price,
more compact
solution.
Risk for capacitor
breakdown.
Decreases max I m
during voltage
doubling.
Decreases max
current capability.
)
NJM3517