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PDF BD8355MWV Data sheet ( Hoja de datos )
| Número de pieza | BD8355MWV | |
| Descripción | Regulators ICs | |
| Fabricantes | ROHM Semiconductor | |
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Regulators ICs for Digital Cameras and Camcorders
System Switching Regulator IC
with Built-in FET (10V)
BD8355MWV
No.11036EAT20
●Description
BD8355MWV is a system switching regulator for Li 2 cell composed of 6 step-down synchronous rectification channels and
1 step-up Di rectification channel for LED application. Using a charge-pump system for high side FET driver and including
power MOSFET reduce the number of peripheral devices and realize high efficiency.
●Functions
1) Includes step-down 6 CH (CH1~6), step-up for LED 1CH (7CH) total 7CH included.
2) Includes Power MOSFET for all channels.
3) Includes Charge-pump circuit for high side driver.
4) Operating frequency of 750 kHz.
5) CH1 and 4 are common, 3 and 5 are also common, and others are possible to turn ON/OFF independently.
6) Includes Short Circuit Protection (SCP), Under Voltage Lock Out (UVLO) and Thermal Shut Down (TSD).
7) Includes Short Circuit Protection for CH6 (SCP6).
8) Includes Over Voltage Protection for CH7.
9) Thermally enhanced UQFN056V7070 package (7mm×7mm, 0.4mm pitch)
●Applications
For digital single-lens reflex camera, digital video camera
●Absolute maximum ratings（Ta＝25℃）
Parameter
Symbol
Ratings
Unit
www.DataSheet.co.kr
VCC, VBAT, VHx1~6
-0.3~11.0
V
VLx1~6
-0.3~VHx
V
Power Supply Voltage
VLx7
HVREG
CTL14, CTL2,
CTL35, CTL6
CTL7
-0.3~28.0
-0.3~15.0
-0.3~11.0
-0.3~7.0
V
V
V
V
IomaxLx1, Lx4, Lx5
±1.5
A
Maximum Current
IomaxLx2, Lx3 ±0.8 A
IomaxLx6
±2.0 A
IomaxLx7
+1.0
A
Power Dissipation
420 (*1)
mW
Pd
930 (*2)
mW
Operating Temperature
Topr
-25~+85
℃
Storage Temperature
Tstg
-55~+125
℃
Junction Temperature
Tjmax
125 ℃
*1 Without external heat sink, power dissipation degrades by 4.2mW/℃ above 25℃.
*2 Power dissipation degrades by 9.3mW/℃ above 25℃, when mounted on a 74.2mm×74.2mm×1.6mmt grass epoxy PCB.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
1/20
2011.12 - Rev.A
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
BD8355MWV
Technical Note
●PIN Assignments
Pin No. Pin Name
Pin Descriptions
1 INV7 CH7 Error Amplifier Negative Input Pin
2 FB6 CH6 Error Amplifier Output Pin
3 INV6 CH6 Error Amplifier Negative Input Pin
4 FB5 CH5 Error Amplifier Output Pin
5 INV5 CH5 Error Amplifier Negative Input Pin
6 GND Ground Pin
7 FB4 CH4 Error Amplifier Output Pin
8 INV4 CH4 Error Amplifier Negative Input Pin
9 INV3 CH3 Error Amplifier Negative Input Pin
10 FB3 CH3 Error Amplifier Output Pin
11 INV2 CH2 Error Amplifier Negative Input Pin
12 FB2 CH2 Error Amplifier Output Pin
13
SCP6
CH6 Short Circuit Protection Delay Time Setting Pin
with External Capacitor
14 CTL7 CH7 ON/OFF Control Pin
15 INV1 CH1 Error Amplifier Negative Input Pin
16 FB1 CH1 Error Amplifier Output Pin
17
SCP
CH1-5 and CH7 Short Circuit Protection Delay Time
Setting
18 RT Oscillator Frequency Adjustment Pin with External
19 VREGA 3.6V Reference Output Voltage Pin
20 VCC Input Supply Voltage Pin
21 VREGD 3.6V Lowside Transistor Bias Voltage Output Pin
22 CMINUS Pin for Connecting Chargepump Flying Capacitor
23 HVREG Chargepump Voltage Output Pin
24 CPLUS Pin for Connecting Chargepump Flying Capacitor
25 VBAT Chargepump Input Supply Voltage Pin
26 Hx1 CH1 Highside Transistor and Driver Supply Voltage
27 Lx1 Pin for Connecting to Inductor of CH1
28 Lx1 Pin for Connecting to Inductor of CH1
Pin No. Pin Name
Pin Descriptions
29 CTL35 CH3, 5 ON/OFF Control Pin
30 CTL14 CH1, 4 ON/OFF Control Pin
31 PGND12 Ground Pin for CH1, 2 Output
32 PGND12 Ground Pin for CH1, 2 Output
33 Lx2 Pin for Connecting to Inductor of CH2
34 Hx2 CH2 Highside Transistor and Driver Supply Voltage
35 Hx3 CH3 Highside Transistor and Driver Supply Voltage
36 Lx3 Pin for Connecting to Inductor of CH3
37 PGND34 Ground Pin for CH3, 4 Output
38 PGND34 Ground Pin for CH3, 4 Output
39 Lx4 Pin for Connecting to Inductor of CH4
40 Lx4 Pin for Connecting to Inductor of CH4
41 CTL6 CH6 ON/OFF Control Pin
42 CTL2 CH2 ON/OFF Control Pin
43 Hx4 CH4 Highside Transistor and Driver Supply Voltage
44 Hx4 CH4 Highside Transistor and Driver Supply Voltage
45 Hx5 CH5 Highside Transistor and Driver Supply Voltage Pin
46 Lx5 Pin for Connecting to Inductor of CH5
47 PGND56 Ground Pin for CH5, 6 Output
48 PGND56 Ground Pin for CH5, 6 Output
49 Lx6 Pin for Connecting to Inductor of CH6
50 Lx6 Pin for Connecting to Inductor of CH6
51 Hx6 CH6 Highside Transistor and Driver Supply Voltage
52 Hx6 CH6 Highside Transistor and Driver Supply Voltage
53 Lx7 Pin for Connecting to Inductor of CH7
54 PGND7 Ground Pin for CH7 Output
55 Vo7 Voltage Monitor Pin for CH7 Over Voltage Protection
56 FB7 CH7 Error Amplifier Output Pin
●PIN Assignments
www.DataSheet.co.kr
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
Fig. 2 Pin Assignments
5/20
2011.12 - Rev.A
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
BD8355MWV
●Reference data
10.00
8.00
6.00
4.00
2.00
0.00
0 2 4 6 8 10 12
VCC [V]
Fig. 11 Circuit current vs supply voltage (all cannels ON)
3.64
Technical Note
5.00
4.00
3.00
2.00
1.00
0.00
0 2 4 6 8 10
VCC [V]
Fig. 12 VREGA vs supply voltage
0.84
12
3.62 0.82
3.60 0.80
3.58 0.78
3.56
-40 -20 0 20 40 60 80
Ambient Temperature [℃]
Fig. 13 VREGA vs ambient temperature
100
1.04
0.76
-40 -20 0
20 40 60 80 100
Ambient Temperature [℃]
Fig. 14 CH1 ErrorAmp. INV threshold vs ambient temperature
www.DataSheet.co.kr
1.04
1.02
1.02
1.00
1.00
0.98
0.98
0.96
-40 -20 0
20 40 60 80 100
Ambient Temperature [℃]
Fig. 15 CH2 ErrorAmp. INV threshold vs ambient temperature
0.96
-40 -20 0 20 40 60 80 100
Ambient Temperature [℃]
Fig. 16 CH6 ErrorAmp. INV threshold vs ambient temperature
0.34
900
0.32
850
800
0.30
750
0.28
700 ‐conditions‐
・ RT=47kΩ
650
0.26
-40 -20 0
20 40 60 80 100
Ambient Temperature [℃]
Fig. 17 CH7 ErrorAmp. INV threshold vs ambient temperature
600
-40 -20 0 20 40 60 80 100
Ambient Temperature [℃]
Fig. 18 Frequency vs ambient temperature
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
11/20
2011.12 - Rev.A
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
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