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PDF LV8773 Data sheet ( Hoja de datos )
| Número de pieza | LV8773 | |
| Descripción | PWM Constant-Current Control Stepping Motor Driver | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LV8773 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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www.DataSheet.co.kr
Ordering number : ENA1961
LV8773
Bi-CMOS LSI
PWM Constant-Current Control
Stepping Motor Driver
Overview
The LV8773 is a 2-channel H-bridge driver IC, which supports forward, reverse, brake, and standby of a motor. It is ideally
suited for driving brushed DC motors and stepping motors used in office equipment and amusement applications.
Features
• BiCDMOS process IC
• Low on resistance (upper side : 0.3Ω ; lower side : 0.25Ω ; total of upper and lower : 0.55Ω ; Ta = 25°C, IO = 2A)
• Motor current selectable in two steps
• Output short-circuit protection circuit (selectable from latch-type or auto-reset-type) incorporated
• Unusual condition warning output pins
• No control power supply required
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Supply voltage
Output peak current
Output current
Logic input voltage
EMO1/EMO2 input voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VM max
IO peak
IO max
VIN
Vemo/Vemo2
Pd max1
Pd max2
Topr
Tstg
Conditions
tw ≤ 10ms, duty 20%
1 unit
*
* Specified circuit board : 90.0mm×90.0mm×1.6mm, glass epoxy 2-layer board.
Ratings
36
2.5
2
-0.3 to +6
-0.3 to +6
3.0
6.2
-20 to +85
-55 to +150
Unit
V
A
A
V
V
W
W
°C
°C
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
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's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
62211 SY 20110609-S00001 No.A1961-1/26
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
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Pin Functions
Pin No. Pin Name
4 ATT2
7 EMM
10 DC22
11 DC21
12 DC12
13 DC11
Pin Function
Motor holding current switching pin.
Output short-circuit protection mode
switching pin.
Channel 2 output control input pin 2
Channel 2 output control input pin 1
Channel 1 output control input pin 2
Channel 1 output control input pin 1
LV8773
VREG5
14 ST
Chip enable pin.
GND
VREG5
Equivalent Circuit
10kΩ
100kΩ
20kΩ
10kΩ
17
18, 25
19
OUT2B
PGND
VM2
20 RF2
21 OUT2A
22 OUT1B
23 RF1
24 VM1
26 OUT1A
Channel 2 OUTB output pin.
Power system ground.
Channel 2 motor power supply
connection pin.
Channel 2 current-sense resistor
connection pin.
Channel 2 OUTA output pin.
Channel 1 OUTB output pin.
Channel 1 current-sense resistor
connection pin.
Channel 1 motor power supply pin.
Channel 1 OUTA output pin.
GND
80kΩ
19
24
21 17
26 22
27 VG
28 VM
1 CP2
2 CP1
GND
Charge pump capacitor connection pin.
Motor power supply connection pin.
Charge pump capacitor connection pin.
Charge pump capacitor connection pin.
VREG5
25 18
20
23
2 28
1
27
16 GND
Ground.
GND
Continued on next page.
No.A1961-5/26
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
LV8773
(7-3) Auto reset type
In the automatic reset mode, when the output current exceeds the detection current level, the output waveform
changes to the switching waveform.
As with the latch system, when the output short-circuited state is detected, the short-circuit protection circuit is
activated. When the operation of the short-circuit detection circuit exceeds the timer latch time (Tcem) described later,
the output is changed over to the standby mode and is reset to the ON mode again in 2ms (typ). In this event, if the
overcurrent mode still continues, the switching mode described above is repeated until the overcurrent mode is
canceled.
(7-4) Unusual condition warning output pins (EMO1, EMO2)
The LV8773 is provided with the EMO pin which notifies the CPU of an unusual condition if the protection circuit
operates by detecting an unusual condition of the IC. This pin is of the open-drain output type and when an unusual
condition is detected, the EMO output is placed in the ON (EMO = Low) state.
The EMO1 pin and the EMO2 pin output unusual condition on 2ch side/ 1ch side respectively.
Furthermore, the EMO (EMO2) pin is placed in the ON state when one of the following conditions occurs.
1. Shorting-to-power, shorting-to-ground, or shorting-to-load occurs at the output pin and the output short-circuit
protection circuit is activated.
2. The IC junction temperature rises and the thermal protection circuit is activated.
Unusual condition
Channel 1 short-circuit detected
Channel 2 short-circuit detected
Overheating condition detected
EMO1
ON
-
ON
EMO2
-
ON
ON
(7-5) Timer latch time (Tcem)
The time taken for the output to be set to OFF when the output has been short-circuited can be set using capacitor
Ccem, connected between the CEM pin and GND. The value of capacitor Ccem is determined by the formula given
below.
Timer latch : Tcem
Tcem ≈ Ccem × Vtcem/Icem [sec]
Vtcem : Comparator threshold voltage, typ 1V
Icem : CEM pin charge current, typ 10μA
(8) Charge Pump Circuit
When the ST pin is set High, the charge pump circuit operates and the VG pin voltage is boosted from the VM voltage
to the VM + VREG5 voltage.
Begin the drive of the motor after the time of tONG or more because it doesn't turn on the output if the voltage of the
VG pin is not pressured to VM+4V or more.
ST
VM+VREG5
VM+4V
VG pin voltage
VM
tONG
VG Pin Voltage Schematic View
No.A1961-11/26
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
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