BD64550EFV Просмотр технического описания (PDF) - ROHM Semiconductor
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BD64550EFV Datasheet PDF : 17 Pages
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BD64550EFV
Technical Note
●Block Diagram, Application Circuit Diagram, and Pin Function
VM2
32
33
VM2
8 VM1
9
VM1
Be sure to use VM1,VM2.VM3 and VM4 by short-circuit.
OUT2P 39
34
OUT2M
0.2Ω
(0.04~0.35Ω)
RNF2 37
38
RNF2
36
RNF2S
VREF2 19
Same as RNF1
SELECT 22
DC2P 24
SCLK(DC1P) 27
DC2E 23
STROBE(DC1E) 25
SDATA 26
AGND
29
From
VDCDCOUT
16
RIN
ROUT
14
1µF
(0.1µF~2.2µF)
Pre
driver
Pre
driver
CONTROL LOGIC
1/10
1/10
Selector
Serial
Control
POWER
MONITOR
RESET
OSC
UVLO
TSD
BG
REG
BG BG
DRIVER
7 OUT1P
2
OUT1M
3 RNF1
4
5
RNF1
RNF1S
20 VREF1
0.2Ω
(0.04Ω~0.35Ω)
31 VM3
300µF
(220µF~470µF)
28 RESET
40 PGND
21 DGND
VM4
10
SWOUT
220µH VDCDCOUT
2.7kΩ
12
0.2Ω(0.04Ω~0.35Ω)
Io1=(VREF1/10)・(1/RNF1S)
See P.9.
N.C. 1
OUT1M 2
RNF1 3
RNF1 4
RNF1S 5
N.C. 6
OUT1P 7
VM1 8
VM1 9
VM4 10
N.C. 11
SWOUT 12
N.C. 13
ROUT 14
N.C. 15
RIN 16
N.C. 17
DSEN 18
VREF2 19
VREF1 20
100µF
18
DSEN
4700pF
1kΩ
The figure on the left-hand side shows
optimum recommended values.
See P.10 for setting.
40 PGND
39 OUT2P
38 RNF2
37 RNF2
36 RNF2S
35 N.C.
34 OUT2M
33 VM2
32 VM2
31 VM3
30 N.C.
29 AGND
28 RESET
27 SCLK
26 SDATA
25 STROBE
24 DC2P
23 DC2E
22 SELECT
21 DGND
Fig.12 Block Diagram and Application Circuit Diagram
Fig.13 Pin Assignment Diagram
No.
Pin
name
Function
1
NC Non Connection
No.
Pin
name
21 DGND Digital GND
Function
2 OUT1M H-bridge output pin 1M
22 SELECT Input pin select pin
3 RNF1 Output current detection pin 1
23 DC2E H-bridge 2 side enable input pin
4 RNF1 Output current detection pin 1
24 DC2P H-bridge 2 side phase pin
5 RNF1S Output current detection input pin
6
NC Non Connection
25
STROBE
Serial port strobe input pin /
H-bridge 1 side enable pin
7 OUT1P H-bridge output pin 1P
26 SDATA Serial port data input pin
8
VM1 Motor power supply pin
9
VM1 Motor power supply pin
27
SCLK
Serial port clock input pin /
H-bridge 1 side phase input pin
10 VM4 Switching regulator power supply pin
28 RESET Reset signal output pin
11
NC Non Connection
29 AGND ANALOG GND
12 SWOUT Switching regulator output pin
30
NC Non Connection
13
NC Non Connection
31 VM3 Power supply pin
14 ROUT Series regulator output pin
32 VM2 Motor power supply pin
15
NC Non Connection
33 VM2 Motor power supply pin
16
RIN Series regulator power supply pin
34 OUT2M H-bridge output pin 2M
17
NC Non Connection
35
NC Non Connection
18 DSEN Switching regulator voltage sense pin
36 RNF2S Output current detection input pin
19 VREF2 Reference voltage input pin
37 RNF2 Output current detection pin 2
20 VREF1 Reference voltage input pin
38 RNF2 Output current detection pin 2
39 OUT2P H-bridge output pin 2P
40 PGND POWER GND
* Precaution regarding VM pin
If you use VM1, VM2, VM3 and VM4 not by short-circuit, they may be destroyed. Be sure to use them by short-circuit.
And be sure to set up a bypass capacitor (220µF to 470µF) closer to VM3 pin as much as possible.
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4/16
2010.06 - Rev.A
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