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PDF BD6873KN Data sheet ( Hoja de datos )
| Número de pieza | BD6873KN | |
| Descripción | 6ch System Lens Drivers | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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SystemLensDriverSeriesforDigitalStillCameras/Single-lensReflexCameras
6ch System Lens Drivers
for Digital Still Cameras /
Single-lens Reflex Cameras
BD6373GW,BD6873KN,BD6753KV
No.09014EAT02
●Description
The BD6373GW motor driver provides 6 Full-ON Drive H-bridge channels. The BD6873KN motor driver provides 5 Full-ON
Drive H-bridge channels and 1 Linear Constant-Current Drive H-bridge channel, while the BD6753KV provides 4 Full-ON
Drive channels and 2 PWM Constant-Current Drive H-bridge channels.
Stepping motors can be used for auto focus, and either zoom or iris. A new drive type (lens barrier) is also available. Three types of drivers
for shutter are offered: a simple Full-ON type, a high-precision linear constant current type, or a high-efficiency PWM constant current type,
enabling selection of the ideal solution based on the application.
●Features
1) Subminiature 31PIN Wafer-level CSP (Chip Size Package): 2.6 x 2.6 x 0.85mm3 (BD6373GW)
2) DMOS output allowing a range power supply: 4.5V to 10.5V (BD6753KV; VM1), 2.0V to 10.5V (BD6753KV; VM2 to VM4)
3) Low ON-Resistance Power MOS output:
Full-ON Drive block with 1.2Ω Typ. (BD6373GW)
Full-ON Drive block with 1.2Ω Typ. and Linear Constant-Current Drive block with 1.0Ω Typ. (BD6873KN)
Full-ON Drive block with 1.2Ω Typ. and PWM Constant-Current Drive block with 1.2Ω Typ. (BD6753KV)
4) Serial interface 3-line bus control input (BD6753KV)
5) Built-in two-step output current setting switch for the Linear Constant-Current Drive block (BD6873KN)
6) Drive mode switching function
7) 1.2V±3% high-precision reference voltage output (BD6873KN)
8) Constant-Current Drive block features phase compensation capacitor-free design (BD6873KN)
9) Built-in ±3% high-precision Linear Constant-Current Driver (BD6873KN)
10) Built-in peak current control PWM Constant-Current Driver (BD6753KV)
11) Built-in charge pump circuit for the DMOS gate voltage drive (BD6753KV)
12) UVLO (Under Voltage Lockout Protection) function
13) Built-in TSD (Thermal Shut Down) circuit
14) Standby current consumption: 0μA Typ.
●Absolute Maximum Ratings
Parameter
Symbol
BD6373GW
Limit
BD6873KN
BD6753KV
Power supply voltage
VCC
-0.5 to +6.5
0 to +7.0
-0.5 to +7.0
Motor power supply voltage
VM
-0.5 to +6.5
0 to +7.0
-0.5 to +12.5
Charge pump voltage
VG
-
- 18.0
Control input voltage
Power dissipation
VIN -0.5 to VCC+0.5
Pd 940※1
0 to VCC
950※2
-0.5 to VCC+0.5
1125※3
Operating temperature range
Topr
-25 to +85
-25 to +85
-25 to +75
Junction temperature
Tjmax
+150
+150
+150
Storage temperature range
H-bridge output current
Tstg -55 to +150
-55 to +150
-55 to +150
Iout
-800 to +800※4
-800 to +800※4
-800 to +800※4
※1 Reduced by 7.52mW/°C over 25°C, when mounted on a glass epoxy board (50mm x 58mm x 1.75mm; 8layers).
※2 Reduced by 7.6mW/°C over 25°C, when mounted on a glass epoxy board (70mm x 70mm x 1.6mm).
※3 Reduced by 9.0mW/°C over 25°C, when mounted on a glass epoxy board (70mm x 70mm x 1.6mm).
※4 Must not exceed Pd, ASO, or Tjmax of 150°C.
Unit
V
V
V
V
mW
°C
°C
°C
mA/ch
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
1/17
2009.06 - Rev.A
Free Datasheet http://www.datasheet4u.com/
1 page  
BD6373GW, BD6873KN, BD6753KV
Technical Note
●Block Diagram, Pin Arrangement, and Pin Function
VCC
F3
TSD & UVLO
BandGap
ENABLE12 C2
INPUT1 D2
INPUT2 E3
Logic12
H bridge
L Full ON
H bridge
Full ON
F2 VM12
E2 F1 OUT1A
E1 OUT1B
D1 OUT2A
C1 OUT2B
B1 PGND12
ENABLE34 D3
INPUT3 B3
INPUT4 B4
Logic34
A2 VM34
H bridge
A1 B2 OUT3A
L
Full ON
A3 OUT3B
H bridge
Full ON
A4 OUT4A
A6 B5 OUT4B
A5 PGND34
INPUT5 C5
BRAKE5 D4
INPUT6 E4
BRAKE6 D5
L
F4
GND
H bridge
Full ON
H bridge
Full ON
F5 VM56
C6 OUT5A
D6 OUT5B
E6 OUT6A
E5 F6 OUT6B
B6 PGND56
Fig.12 BD6373GW Block Diagram
123456
A OUT3A
VM34
OUT3B OUT4A PGND34 OUT4B
B PGND12 OUT3A INPUT3 INPUT4 OUT4B PGND56
INDEX
C OUT2B ENABLE12
POST
INPUT5 OUT5A
D OUT2A INPUT1 ENABLE34 BRAKE5 BRAKE6 OUT5B
E OUT1B OUT1A INPUT2 INPUT6 OUT6B OUT6A
F OUT1A
VM12
VCC
GND
VM56
OUT6B
OUT3A, OUT4B, OUT1A, and OUT6B, which are 2
function pins, are shorted on printed circuit boards.
Fig.13 BD6373GW Pin Arrangement (Top View)
UCSP75M2 Package
BD6373GW Pin Function Table
No. Pin Name
Function
No. Pin Name
Function
A1 OUT3A H-bridge output pin ch3 A
D1 OUT2A H-bridge output pin ch2 A
A2 VM34 Motor power supply pin ch3 and ch4
D2 INPUT1 Control input pin ch1 INPUT
A3 OUT3B H-bridge output pin ch3 B
D3 ENABLE34 Control input pin ch3 and ch4 ENABLE
A4 OUT4A H-bridge output pin ch4 A
D4 BRAKE5 Control input pin ch5 BRAKE
A5 PGND34 Motor ground pin ch3 and ch4
D5 BRAKE6 Control input pin ch6 BRAKE
A6 OUT4B H-bridge output pin ch4 B
D6 OUT5B H-bridge output pin ch5 B
B1 PGND12 Motor ground pin ch1 and ch2
E1 OUT1B H-bridge output pin ch1 B
B2 OUT3A H-bridge output pin ch3 A
E2 OUT1A H-bridge output pin ch1 A
B3 INPUT3 Control input pin ch3 INPUT
E3 INPUT2 Control input pin ch2 INPUT
B4 INPUT4 Control input pin ch4 INPUT
E4 INPUT6 Control input pin ch6 INPUT
B5 OUT4B H-bridge output pin ch4 B
E5 OUT6B H-bridge output pin ch6 B
B6 PGND56 Motor ground pin ch5 and ch6
E6 OUT6A H-bridge output pin ch6 A
C1 OUT2B H-bridge output pin ch2 B
F1 OUT1A H-bridge output pin ch1 A
C2 ENABLE12 Control input pin ch1 and ch2 ENABLE F2
VM12 Motor power supply pin ch1 and ch2
C3 INDEX POST
-
F3
VCC
Power supply pin
C4 - F4 GND Ground pin
C5 INPUT5 Control input pin ch5
F5 VM56 Motor power supply pin ch5 and ch6
C6 OUT5A H-bridge output pin ch5 A
F6 OUT6B H-bridge output pin ch6 B
OUT3A, OUT4B, OUT1A, and OUT6B, which are 2 function pins, are shorted on printed circuit boards.
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
5/17
2009.06 - Rev.A
Free Datasheet http://www.datasheet4u.com/
5 Page 
BD6373GW, BD6873KN, BD6753KV
Technical Note
5) Drive system of PWM Constant-Current H-bridge (BD6753KV: ch5 and ch6)
BD6753KV (ch5 and ch6) enable peak current control PWM Constant-Current Driving.
(1) Output current detection and current settings
By connecting external resistance (0.1Ω to 5.0Ω) to the RNF3 and RNF4 pins of the IC, the motor drive current will be
converted into voltage in order to be detected. The output current is kept constant by shorting the RNF3 and RNF4 pins with
the SENSE3 and SENSE4 pins, respectively, and comparing the voltage to the set voltage input from outside the IC to the
VLIM5 and VLIM6 pins. As with the BD6873KN, the reference voltage generated inside the IC (VREF pin: 0.9V±10%) can
be divided using external resistors (from 1kΩ to 20kΩ). The resulting value can be input as the set voltage.
It is also necessary to connect a resistor and capacitor to the CR1 and CR2 pins, to determine the PWM drive off time.
(2) PWM Constant-Current control operation
When the output current in output ON mode increases, and the RNF3 or RNF4 voltage reaches the value set with the
VLIM5 or VLIM6 voltage, the internal current limiting comparator operates to set the IC to short mode. This caused the
current to be attenuated so that the H-bridge's low-side DMOS is ON. Once the off time (Toff) ends, as measured by
the CR timer, the IC returns to output ON mode. By repeating this cycle, the IC maintains a fixed current due to the
motor's inductance characteristics.
(3) Noise cancellation function
In order to avoid false detections by the current limiting comparator (caused by spike noise generated when output is
turned on), the IC uses the noise cancellation time (Tn) to disable current detection. This begins from the time output
turns on, until the noise cancellation time elapses. The noise cancellation time represents the minimum on time, and is
determined by the CR pin's internal resistor, external resistor, and capacitor.
(4) CR timer
When output turns on, the CR pin is clamped at approximately 0.9V. When the mode changes to short mode, it
discharges to approximately 0.4V. The interval over which this 0.5V voltage differential is discharged, is determined by
the off time (Toff). Once the CR pin voltage reaches 0.4V, the pin begins to charge as the output turns on, until it
reaches 0.9V. The interval over which the pin charges from 0.4V to approximately 0.8V is given by the noise
cancellation time (Tn). Toff and Tn are determined by the external resistor and capacitor connected to the CR pin.
A low resistance value to the CR pin will prevent it from reaching the clamp voltage. Therefore a resistor from 5 kΩ to
50kΩ should be used. Capacitors should be from 10pF to 2200pF. The use of a capacitance in excess of 2200pF will
lengthen the noise cancellation time and may cause the output current to exceed the set current. Setting a longer off
time may increase the output current ripple, reducing both the average current and the motor's rotational efficiency.
VLIM5[V]
VLIM6[V]
Output current value Iout[A] =
RNF3[Ω]
or
RNF4[Ω]
･･････(2)
Output current: Iout[A]
RNF voltage: VRNF[V]
Spike noise
CR voltage: VCR[V]
Noise cancellation time: Tn[sec]
Discharge period
Off time: Toff[sec]
PWM Constant-Current
setting value
0A
VLIM pin setting voltage
0V
0.9V
0.8V
0.4V
Charge period
Fig.21 BD6753KV Peak Current Control PWM Constant-Current Drive Using the CR Timer
If the VLIM5 or VLIM6 is shorted to the VCC pin (or the same voltage level as the VCC is applied) and the SENSE3 or
SENSE4 and RNF3 or RNF4 pins are shorted to the ground, this channel can be used as a Full-ON Drive H-bridge
like the other four channels.
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
11/17
2009.06 - Rev.A
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet BD6873KN.PDF ] | |
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