|
|
PDF BD6889GU Data sheet ( Hoja de datos )
| Número de pieza | BD6889GU | |
| Descripción | 7-Channel System Lens Driver | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de BD6889GU (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
|
No Preview Available !
Datasheet
Motor Drivers for Digital Still Cameras
7-Channel System Lens Driver
for Digital Still Cameras
BD6889GU
General Description
The BD6889GU is a motor driver that integrates 6
Full-ON type H-Bridges and 1 Linear Constant-Current
type H-Bridge. The device is intended to drive three
stepping motor for auto focus system, zoom, and iris,
and making it possible to design a sophisticated, high
precision lens drive system.
Features
Low ON-Resistance Power CMOS Output
4 Digital NPN Transistor Circuits for
Rectangular Waveform of Photo-Interrupter:
Input-Dividing Type with Output Pull-up Resistor
4 Digital PNP Transistor Circuits for
Rectangular Waveform of Photo-Interrupter:
Input-Dividing Type with Output Pull-down Resistor
Voltage-Regulator Circuit for Photo-Interrupter
High-Precision (0.9V±2%) Reference Voltage Output
Phase Compensation Capacitor-Free Design
for Linear Constant-Current Drive Block
High-Precision (±3%) Linear Constant-Current Driver
Under Voltage Locked Out Protection
& Thermal Shut Down Circuit
Applications
Mobile system
Home appliance
Amusement system, etc
Key Specifications
Power Supply Voltage Range:
2.5V to 5.7V
Motor Power Supply Voltage Range: 2.5V to 5.7V
Circuit Current (No Signal):
1.5mA(Typ)
Stand-By Current:
10μA (Max)
Control Input Voltage Range:
0V to VCCV
H-Bridge Output Current:
-0.5A/ch to +0.5A/ch
Output ON-Resistance (Channel 1 to 6): 1.3Ω(Typ)
Output ON-Resistance (Channel 7):
0.9Ω(Typ)
Operating Temperature Range: -25°C to +85°C
Package
VBGA063T050
W(Typ) x D(Typ) x H(Max)
5.00mm x 5.00mm x 1.20mm
VBGA063T050
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no designed protection against radioactive rays
1/17
TSZ02201-0H3H0B601390-1-2
09.Dec.2015 Rev.001
1 page  
BD6889GU
Description of Blocks
1. Power-Saving Function
A power-saving function is included, which allows the system to save power when not driving the motor. The voltage
level on this pin should be set high so as to keep the operation mode. (See the Electrical Characteristics; P.7/17)
2. Motor Control Input (IN1A to IN7B)
Logic level controls the output logic of H-Bridge. The logic of Full-ON H-Bridges corresponds to IN/IN mode, and the logic
of Constant-Current H-bridge EN/IN mode.
(See the Electrical Characteristics; P.7/17, and I/O Truth Table; P.9/17)
3. H-Bridge
Each H-bridge can be controlled independently. It is therefore possible to drive the H-bridges simultaneously, as long
as the package thermal tolerances are not exceeded. Because the respective output transistors consist of power
CMOS which consumes a motor power supply VM, the ON-Resistance value of high and low-side total is dependent
on VM voltage. Further, the whole application must be designed so that the maximum current of each channel may be
500mA or below. (See the Recommended Operating Conditions; p.6/17)
4. Linear Constant-Current H-bridge (Channel 7)
(a) Reference Voltage Output (with a tolerance of 2%)
The VREF pin can output 0.9V based on the internal reference voltage. The output current of the
Constant-Current Drive block can be controlled by connecting external resistor to the VREF pin and setting the
voltage which is divided by the resistor to the output current setting pin (VLIM pin). It is recommended to place
the external 1kΩ or above resistor in consideration of the load current capacity of the VREF pin, and to place the
20kΩ or below resistor in order to minimize the fluctuation caused by the base current of the internal transistor.
(b) Output Current Detection and Current Settings
A low-value (0.1Ω to 5.0Ω) resistor can be placed between the RNF pin and ground to detect the motor winding
current. When making the RNF and SENSE pins short-circuit, the internal circuits can output the accurate
constant current by comparing the VLIM voltage with detecting voltage. To make more accurate motor winding
current, trim the external RNF resistor, and supply VLIM pin with another precise external voltage. In case of this
condition, VREF pin should be kept open.
Output Current IOUT[A] = VLIM[V] / RNF[Ω]
The motor winding current will be 400mA3%, if 0.2V is set to the VLIM pin and a 0.5Ω external resistor is
connected to the RNF pin. If the VLIM pin is shorted to the VCC pin (or the same voltage as the VCC is set) and
the SENSE and RNF pins are shorted to the ground, this channel can drive as a Full-ON type H-bridge like other
channels.
5. Digital Transistor for Rectangular Waveform
The internal 4 NPN and 4 PNP digital transistors can be used to make photo-interrupter waveform rectangular. To
detect lens position, the sensed signal is reshaped by internal circuitry and then may be output to the MCU etc. The
device includes pull-up resistors for each NPN output pin (SO1N to SO4N) and pull-down resistors for each PNP
output pin (SO1P to SO4P). If not supplying an external voltage to input pins (SI1 to SI4), the NPN output pins will
output VCC voltage and the PNP output pins ground. DSW, DSEL1 and DSEL2 pins can control the switching of NPN
and PNP transistors. (See I/O Truth Table; P.9/17)
6. Voltage-Regulator for Photo-Interrupter
The device includes voltage-regulator circuits for photo-interrupter. Set high logic on SW pin to enable output of the
internal regulator, and set low to disable. It also includes a pull-down resistor so that regulator output (REG pin) may
be off even if SW pin is opened.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/17
TSZ02201-0H3H0B601390-1-2
09.Dec.2015 Rev.001
5 Page 
BD6889GU
Application Example
Bypass filter capacitor for
power supply
Power Saving
H :Active
L : Stand-by
Motor control input
Motor control input
Motor control input
Motor control input
Selector for digital
transistor
REG switch
H : REG ON
L : REG OFF
PS
C7
IN1A E3
IN1B E4
IN2A F3
IN2B G3
IN3A F6
IN3B F7
IN4A E6
IN4B E5
IN5A C6
IN5B D5
IN6A B3
IN6B B4
IN7A C4
IN7B D4
DSEL1 E2
DSEL2 C3
DSW B2
SW
C2
1µF to 100µF
VCC
D2
Bypass filter capacitor for
power supply
Power Save
TSD & UVLO
Logic12
L
o
g
i
c
1
2
Level Shift
&
Pre Driver
Logic34
L
o
g
i
c
3
4
Level Shift
&
Pre Driver
Level Shift
Logic56 L
&
o
g
Pre Driver
i
c
5
6
Level Shift
Logic7 L
&
o
g
Pre Driver
i
c
7
DTR Selector
Digital
transistor SW
VCC
BandGap
H bridge
Full ON
1µF to 100µF
H5
VM1
H2
OUT1A
H3 OUT1B
M
H bridge
Full ON
H bridge
Full ON
H7
OUT2A
H6 OUT2B
Bypass filter capacitor for
power supply
H4 PGND1
1µF to 100µF
D8
VM2
G8
OUT3A
OUT3B
F8
M
H bridge
Full ON
H bridge
Full ON
B8
OUT4A
C8 OUT4B
Bypass filter capacitor for
power supply
E8 PGND2
1µF to 100µF
A4
VM3
A7
OUT5A
A6 OUT5B
M
VREF
H bridge
Full ON
H bridge
Const. Current
VCC
VCC
VCC
A2 OUT6A
A3 OUT6B
Bypass filter capacitor for
power supply
A5 PGND3
1µF to 100µF
D1
VM4
C1
OUT7A
OUT7B
G1
RNF
E1
The motor output current is
converted to a voltage with the
external RNF resistor and
transmitted to the SENSE pin.
IOUT[A] = VVLIM[V]÷RRNF[Ω]
F1 0.1Ω to 5.0Ω
SENSE
VLIM
F2
R2
R1
D3
VREF
B5 SO4P
When using the VREF voltage (0.9V)
resistor division value as VLIM input
value, select R1 and R2 values, as
follows
1kΩ ≤ R1+R2 ≤ 20k
B6 SO4N
SW SW
REG
REG
B7
Power supply for photo
interrupter
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
C5
SI4
VCC
The sensor signal SI4, for lens position
detection, is reshaped and output to SO4x
SW SW
SW SW
SW SW
G2 F4
GND
SI1
The sensor signal SI1, for lens position
detection, is reshaped and output to SO1x
G5 G4
F5
SO1N
SO1P SI2
REG
G7 G6
D6
SO2N
SO2P
SI3
REG
E7
SO3N
REG
D7
SO3P
The sensor signal SI3, for lens position
detection, is reshaped and output to SO3x
The sensor signal SI2, for lens position
detection, is reshaped and output to SO2x
Selection of Components Externally Connected
When using the circuit with changes to the external circuit constants, make sure to leave an adequate margin for external
components including static and transitional characteristics as well as dispersion of the IC.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/17
TSZ02201-0H3H0B601390-1-2
09.Dec.2015 Rev.001
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet BD6889GU.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| BD6889GU | 7-Channel System Lens Driver | ROHM Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |