Ordering number: EN4996
Monolithic Digital IC
LB1840M
Low-voltage/Low-saturation Bidirectional
Variable Constant-voltage Motor Driver
Overview Package Dimensions
unit: mm
The LB1840M is a low-voltage, low-saturation, three-input
type two-channel bidirectional motor driver that permits 3111-MFP14S
switching between constant-voltage regulated output and
saturated output. The design is ideal for a two-phase bipolar [LB1840M]
driver for stepping motors.
Features
. Wide operating voltage range (3.0 to 9.0 V).
. Low saturation voltage
. VConsumes
O(sat) = 0.40 V at I = 200 mA.
O
almost no current in standby mode
(0.1 µA or less).
. Permits setting of bidirectional constant-voltage regulated
. value. SANYO : MFP14S
. Three-input type that is ideal for a two-phase bipolar driver.
Permits switching between constant-voltage regulated output
. and saturated output.
Built in reference voltage coupled to input.
. Compact MFP-14S package.
Specifications
Absolute Maximum Ratings at Ta = 25 °C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCC max 10.5 V
Output current Im max 250 mA
Applied input voltage VIN –0.3 to +10 V
Allowable power dissipation Pd max With board ( 30 × 30 × 1.5 mm3 ) 800 mW
Operating temperature Topr –20 to +80 °C
Storage temperature Tstg –40 to +150 °C
Allowable Operating Ranges at Ta = 25 °C
Parameter Symbol Conditions Ratings Unit
Supply voltage VCC 3.0 to 9.0 V
IN pin high level voltage VINH 3.0 to 9.0 V
IN pin low level voltage VINL –0.3 to +0.7 V
Control voltage VC 0.2 to 6.0 V
VM pin high level voltage VMH VCC – 0.3 to VCC V
VM pin low level voltage VML –0.3 to VCC–2.5 V
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O1596HA(II) No.4996-1/5
LB1840M
Electrical Characteristics at Ta = 25 °C, VCC = 6 V
Parameter Symbol Conditions min typ max Unit
Supply current ICC0 During standby 0.1 10 µA
ICC1 During bidirectional operation (for two channels): 3.5 5.0 mA
during control, load open
ICC2 during saturation, load open 4.5 6.5 mA
Output saturation voltage Vsat1 IO = 100 mA (upper side + lower side) 0.30 0.40 V
Vsat2 IO = 200 mA (upper side + lower side) 0.40 0.55 V
VOsat3 IO = 200 mA (lower side) 0.07 0.10 0.15 V
Reference voltage Vref IVref = 1 mA 1.85 2.0 2.15 V
Output voltage ∆VO VO = 5 V, VCC = 5.5 to 9 V,
20 mV
voltage characteristics ∆VCC IO = 100 mA
Output voltage ∆VO VO = 5 V, VCC = 6 V,
50 mV
current characteristics ∆IO IO = 10 to 100 mA
IIN VIN = 5 V 90 150 µA
Input current
IVM VM = GND 210 300 µA
Output voltage VO Between OUT and GND 2.45 × VC 2.65 × VC V
Equivalent Circuit Block Diagram
(For one channel)
Thermal
Reference
voltage
Logic predriver
Pin Assignment
Note: Both GND pins must be grounded.
Top view
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LB1840M
Truth Table
Input Output
Mode
ENA IN 1/2 VM OUT 1/3 OUT 2/4
L — — OFF OFF Standby
Constant-voltage regulated
H L H H L
forward operation
Saturated
H L L H L
forward operation
Constant-voltage regulated
H H H L H
reverse operation
Saturated
H H L L H
reverse operation
The constant-voltage regulated output VO (= voltage between H side output and GND) is controlled by VO = 2.5 × VC. The output
is in the saturated state when the VC input range is 0.2 to 6 V and VO ^ VCC.
Pin Functions
Pin No. Symbol Equivalent Circuit Diagram Pin Function
14 VCC Power supply pin for output and controller.
9 GND GND pins for output and controller.
12 Both must be grounded.
3 IN2 Input pins that determine the excitation of
6 IN1 the outputs.
IN1 control outputs OUT1 and OUT2;
IN2 control outputs OUT3 and OUT4.
L: –0.3 to +0.7 V or open
H: 3.0 to 9.0 V
There are no limitations on the magnitude
relationships between the VCC and VIN
supply voltages.
8 OUT4 Output pins.
10 OUT3 Have built-in spark killer diodes.
11 OUT1
13 OUT2
4 Vref Reference voltage (= 2.0 V).
Continued on next page.
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LB1840M
Continued from preceding page.
Pin No. Symbol Equivalent Circuit Diagram Pin Function
5 VC Input pins that determine the constant-
voltage regulated output level.
The constant-voltage regulated output VO
Output (= voltage between H side output and
GND) is controlled by VO = 2.5 × VC. There
are no limitations on the magnitude
relationships between the VCC and VC
supply voltages.
2 ENA Standby/drive control input pin.
Current drain in standby mode is 10 µA or
less.
L: –0.3 to + 0.7 V or open
H: 3.0 to 9.0 V
There are no limitation on the magnitude
relationships between VCC and VENA
supply voltage.
7 VM Control input pin for switching between
constant voltage output and saturated
output.
L: –0.3 to VCC − 2.5 V
(saturated output)
H: VCC − 0.3 to VCC or open
(constant-voltage regulated output)
Sample Application Circuit
Stepping motor
If the outputs oscillate, insert capacitors
of 0.001 to 0.1 µF between the outputs.
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LB1840M
Allowable power dissipation, Pd max — mW
Output saturation voltage, VO(sat) — V
Specified board (30 × 30 × 1.5 mm3 glass epoxy)
Ambient temperature, Ta — °C Output current, IO — mA
No load
Output voltage, VO — V
Input current, IIN — µA
No load
Input voltage, VIN — V Supply voltage, VCC — V
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment,
nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or
indirectly cause injury, death or property loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors
and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and
expenses associated with such use:
2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO
ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume
production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use
or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of October, 1996. Specifications and information herein are subject to change without notice.
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