bd6757kn ROHM Co. Ltd., bd6757kn Datasheet - Page 7

• Manufacturer Part Number: bd6757kn
• Description: 7ch System Lens Drivers For Digital Still Cameras / Single-lens Reflex Cameras
• Manufacturer: ROHM Co. Ltd.

●Application Circuit Diagram
© 2009 ROHM Co., Ltd. All rights reserved.
BD6757KN, BD6889GU
www.rohm.com
value as VLIMH and VLIML input value, select R
values such that,
When using the VREF voltage (0.9V) resistance division
1kΩ≦R
Motor control input
(p.9/16)
Motor control input
(p.9/16)
Motor control input
(p.9/16)
Motor control input
(p.9/16)
1
+R
Power-saving (p.9/16)
2
H : Active
L : Standby
+R
3
≦20kΩ (p.9/16)
Bypass filter Capacitor for
power supply input. (p.14/16)
IN1A
IN1B
IN2A
IN2B
IN3A
IN3B
IN4A
IN4B
IN5A
IN5B
IN6A
IN6B
IN7A 3
IN7B 1
1
PS
, R
2
, and R
25
26
27
28
29
37
38
39
15
14
13
12
GND
11
1～100uF
4
3
Power Save
VREF
Fig.12 BD6757KN Application Circuit Diagram
Logic12
Logic12
Logic34
Logic56
Logic7
VREF
Output current selection
(p.9/16)
OSC
H : VLIML
L : VLIMH
9
5
VCC
R
LIMSW
1
8
Charge Pump
TSD
31
Level Shift
Level Shift
Level Shift
Level Shift
Pre Driver
Pre Driver
Pre Driver
Pre Driver
0.1μF
6
Selector
CP1
VLIMH
R
&
&
&
&
&
2
UVLO
VG
VG
VG
VG
VG
7/15
32
7
VLIML
CP2
R
3
SI1
Charge Pump
33
40
0.1μF
CP3
SO1
Const. Current
34
H bridge
H bridge
H bridge
H bridge
H bridge
H bridge
H bridge
BandGap
52
VCC
CP4
Full ON
Full ON
Full ON
Full ON
Full ON
Full ON
SI2
detection, is reshaped and output to SO1.
p.10/16
The sensor signal SI1, for lens position
41
0.1μF
35
VG
SO2
51
VCC
10
16
17
18
19
30
22
21
24
23
20
36
42
43
45
46
44
47
49
48
50
2
PGND1
PGND2
VM1
OUT1A
OUT1B
OUT2A
OUT2B
VM2
OUT3A
OUT3B
OUT4A
OUT4B
VM3
OUT5A
OUT5B
OUT6A
OUT6B
VM4
OUT7A
OUT7B
RNF
SENSE
detection, is reshaped and output to SO2.
p.10/16
The sensor signal SI2, for lens position
0.1Ω~5.0Ω
the RNF external resistor and transmitted to the
SENSE pin. (p.9/16)
The output current is converted to a voltage with
Iout[A] = (VLIMH or VLIML[V])÷RNF[Ω]
1～100uF
1～100uF
1～100uF
1～100uF
M
M
M
Technical Note
2009.06 - Rev.A
Bypass filter Capacitor for
power supply input. (p.14/16)
Bypass filter Capacitor for
power supply input. (p.14/16)
Bypass filter Capacitor for
power supply input. (p.14/16)
Bypass filter Capacitor for
power supply input. (p.14/16)