LB11946_09 SANYO [Sanyo Semicon Device], LB11946_09 Datasheet

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LB11946_09

Manufacturer Part Number
LB11946_09
Description
PWM Current Control Stepping Motor Driver
Manufacturer
SANYO [Sanyo Semicon Device]
Datasheet
1.LB11946_09.pdf (14 pages)
Ordering number : EN7946A
LB11946
Overview
Features
Specifications
Maximum Ratings at Ta = 25°C
Motor supply voltage
Peak output current
Continuous output current
Logic system supply voltage
Logic input voltage range
Emitter output voltage
Allowable power dissipation
Operating temperature
Storage temperature
• PWM current control (with a fixed off time)
• Logic input serial-parallel converter (allows 1-2, W1-2, 2W1-2, and 4W1-2 phase excitation drive)
• Current attenuation switching function (with slow decay, fast decay, and mixed decay modes)
• Built-in upper and lower side diodes
• Simultaneous on state prevention function (through current prevention)
• Noise canceller function
• Thermal shutdown circuit
• Shutoff on low logic system voltage circuit
• Low-power mode control pin
The LB11946 is a stepping motor driver IC that implements PWM current control bipolar drive with a fixed off time. This
IC features 15 current setting levels using a fixed VREF voltage and support for micro-stepping drive from 1-2 phase
excitation drive to 4W1-2 phase excitation drive. This device is optimal for driving stepping motors such as those used for
carriage drive and paper feed in printers.
Parameter
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
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
device, the customer should always evaluate and test devices mounted in the customer
equipment.
'
s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
V BB
I O peak
I O max
V CC
V IN
VE
Pd max
Topr
Tstg
Symbol
Monolithic Digital IC
PWM Current Control
Stepping Motor Driver
tw ≤ 20µS
V CC = 5V specifications
V CC = 3.3V specifications
Independent IC
Conditions
22509 MS 20090212-S00006 / N2206 / 73004TN(OT) No.7946-1/14
Ratings
'
s products or
-0.3 to V CC
-55 to +150
-25 to +85
1.2
1.0
7.0
1.0
0.5
3.0
50
Unit
°C
°C
W
V
A
A
V
V
V
V

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LB11946_09 Summary of contents

Page 1

Ordering number : EN7946A LB11946 Overview The LB11946 is a stepping motor driver IC that implements PWM current control bipolar drive with a fixed off time. This IC features 15 current setting levels using a fixed VREF voltage and support ...

Page 2

Recommended Operating Conditions 25°C Parameter Symbol Motor supply voltage V BB Logic system supply voltage V CC Reference voltage VREF Electrical Characteristics 25° 5V 42V, VREF = 1.52V ...

Page 3

AC Electrical Characteristics Parameter Symbol Clock frequency Fclk Data setup time TDS Data hold time TDH Minimum clock high-level pulse width TSCH Minimum clock low-level pulse width TSCL SET pin stipulated time Tlat SET pin ...

Page 4

Electrical Characteristics 25° 3.3V 42V, VREF = 1.0V Parameter Symbol Output Block Output stage supply current OFF Output saturation voltage V O (sat ...

Page 5

AC Electrical Characteristics 3.3V Parameter Symbol Clock frequency Fclk Data setup time TDS Data hold time TDH Minimum clock high-level pulse width TSCH Minimum clock low-level pulse width TSCL SET pin stipulated time Tlat SET pin ...

Page 6

Package Dimensions unit : mm (typ) 3147C 28 R1.7 1 20.0 26.75 (1.81) 1.78 0.6 1.0 Pin Assignment Note: The D-GNDA and D-GNDB pins are the anode sides of the lower side diodes LB11946 15 14 ...

Page 7

Timing Chart TSCH CLOCK TSCL DATA SET Serially Transferred Data Definition IA4 IA3 IA2 IA1 DE1 PH1 No ...

Page 8

Current Settings Truth Table * Items in parentheses are defined by the serial data. IA4 IA3 IA2 IA1 (D0) (D1) (D2) (D3 ...

Page 9

Sample Application Circuit MD voltage setting (1.6 to 3.9V) Fast mode: GND Slow mode Sample Application Circuit MD voltage setting (1.2 to 2.5V) Fast mode: GND Slow mode LB11946 ...

Page 10

SLOW DECAY Current Path The reregenerative current at upper-side transistor switching operates Current path at output ON Regenerative current at upper-side transistor OFF Motor current VE/Re FAST DECAY Current Path Current path at output ON Current path ...

Page 11

Switching Time Chart at PWM operation SLOW DECAY (Upper-side Chopping) E pin Output current CR pin OUT pin FAST DECAY E pin Output current CR pin OUT pin LB11946 Serial transmission data (D4, D10) = High tn Switching waveform Serial ...

Page 12

MIX DECAY E pin Output current tn CR pin OUT pin MIX DECAY logic setting serial transmission data (D4, D10) = Low MD pin: 1. specification. 1. ...

Page 13

Attached Documents 1. Switching Off Time and Noise Canceller Time Calculations Notes on the CR Pin Setting (switching off time and noise canceller time) The noise canceller time (Tn) and the switching off time (Toff) are set using the following ...

Page 14

Usage Notes (1) Notes on the VREF pin Since the VREF pin inputs the reference voltage used to set the current, applications must be designed so that noise does not occur at this pin. (2) Notes on the ground pins ...

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