Document
February 1999
PBD 3517/1 Stepper Motor Drive Circuit
Description
PBD 3517/1 is a bipolar, monolithic, integrated circuit, intended to drive a stepper motor in a unipolar, bilevel way. One PBD 3517/1 and a minimum of external components form a complete control and drive unit for LS-TTL- or microprocessor-controlled stepper motor system for currents up to 500mA. The driver is suited for applications requiring least-posssible RFI. Motor performance can be increased by operating in a bilevel drive mode. This means that a high voltage pulse is applied to the motor winding at the beginning of a step, in order to give a rapid rise of current.
Key Features
• Complete driver and phase logic on chip • 2 x 350 mA continuous-output current • Half- and full-step mode generation • LS-TTL-compatible inputs • Bilevel drive mode for high step rates • Voltage-doubling drive possibilities • Half-step position-indication output • Minimal RFI • 16-pin plastic DIP package or 16 pin small outline wide body
VCC
VSS
PQR
LB
STEP PB2
INH OA OB
PA2 PA1
GND
16-pin plastic DIP 16-pin SO (wide body)
Figure 1. Block diagram. 1
P
B
HSM
PB
PB1
D
35
17
DIR
Phase Logic
PA
P B
RC
Mono F-F
LA
D
/1
35 17
/1
PBD 3517/1
PBD 3517/1
Maximum Ratings
Parameter Pin No. Symbol Min Max Unit
Voltage Logic supply Second supply Logic input Current Phase output Second-level output Logic input The zero output Temperature Operating junction temperature Storage temperature
16 15 6, 7, 10, 11 1, 2, 4, 5 13, 14 6, 7, 10, 11 8, 9
VCC VSS VI IP IL II IΟ TJ TS PD PD
0 0 -0.3 0 -500 -10
7 45 6 500 0 6
V V V mA mA mA mA °C °C W W
-40 -55
+150 +150 1.6 1.3
Power Dissipation (Package Data) Power dissipation at TA = 25°C, DIP package. Note 2. Power dissipation, SO package. Note 3.
Recommended Operating Conditions
Parameter Symbol Min Typ Max Unit
Logic supply voltage Second-level supply voltage Phase output current Second-level output current Operating junction temperature Set-up time Step-pulse duration
VCC VSS IP IL TJ ts tp
4.75 10 0 -350 -20 400 800
5
5.25 40 350 0 +125
V V mA mA °C ns ns
ISS
tr
ICC
tf
PBD 3517/1
VCC 16 VSS 15 VLCE Sat
VI HSM or DIR t STEP
PQR
RC 12
Mono F-F
13
LA
IL
14 VSS VCC STEP DIR II IIL IIH HSM INH OA VI VIL VIH VOCE Sat 3 OB 7 6 10 11 9 8
LB
ILL
Phase Logic
PA
1 PB2 PB1 PA2 PA1 IP IPL VL
PB
2 5 4
IP
t
VPCE Sat GND VP
ts
tp td
t
Figure 2. Definition of symbols. 2
Figure 3. Timing diagram.
PBD 3517/1
Electrical Characteristics
Electrical characteristics at TA = +25°C, VCC = +5.0 V, VMM = +40 V, VSS = +40 V unless otherwise specified.
Ref. Parameter Symbol Fig. Conditions Min Typ Max Unit
Supply current
ICC
2 2
INH = LOW INH = HIGH
45 12
60
mA mA
Phase outputs Saturation voltage Leakage current Turn on, turn off
VPCE Sat IPL td td VLCE Sat ILL tOn VIH VIL IIL IIH VØCE Sat
4 2 3 3
IP = 350 mA VP = 0 V +70°C +125°C IL = -350 mA VL = 0 V (note 4)
0.85 500 3 6
V µA µs µs V µA µs V V µA µA V
Second-leve.