参数资料
| 型号： | BD9851EFV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 15/17页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST INV HTSSOP-B20 |
| 标准包装： | 1 |
| PWM 型： | 控制器 |
| 输出数： | 2 |
| 频率 - 最大： | 3MHz |
| 电源电压： | 4 V ~ 18 V |
| 降压： | 是 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 是 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-VSSOP（0.173"，4.40mm 宽） |
| 包装： | 标准包装 |
| 产品目录页面： | 1373 (CN2011-ZH PDF) |
| 其它名称： | BD9851EFV-E2DKR |
11) Although ROHM is confident that the example application circuit reflects the best possible recommendations, be sure to verify circuit
characteristics for your particular application. Modification of constants for other externally connected circuits may cause variations in both static
and transient characteristics for external components as well as this Rohm IC. Allow for sufficient margins when determining circuit constants.
Oscillation frequency setting resistor
12) For the oscillation frequency setting resistor to be inserted between the RT pin and the GND pin, mount this resistor close to the RT pin and
provide the shortest pattern routing.
Thermal derating characteristics
PD(W)
0.8
0.6
MSOP 8
(2) 0.59 W
PD(W)
5
4
HTSSOP-B20
(4) 3.20W
3
(1) 0.30 W
0.4
Wiring width 0.4mm
Pd = 0.50 W
2
(3) 2.30W
qjc = 200?C/W
(2) 1.45W
0.2
0
1
0
(1) 1.00W
0
25
50
75
100
125
150
0
25
50
75
100
125
150
Selection of order type
AMBIENT TEMPERATURE : Ta [?C]
(1) : Single piece of IC
(2) : With ROHM standard PCB mounted
(Glass epoxy PCB of 70mm X 70mm X 1.6mm)
Fig.30
AMBIENT TEMPERATURE : Ta [?C]
(1) : Single piece of IC
PCB size: 70mm X 70mm X 1.6 mm 2 ( PCB incorporates thermal via)
Copper foil area on the reverse side of PCB: 10.5 X 10.5mm 2
(2) : 2-layer PCB (Copper foil area on the reverse side of PCB: 15mm X 15mm
(3) : 2-layer PCB (Copper foil area on the reverse side of PCB: 70mm X 70mm
(4) : 4-layer PCB (Copper foil area on the reverse side of PCB: 70mm X 70mm
Fig.31
B
D
9
8
5
0
F
V
M
T
R
ROHM
model name
Product No.
9850=10V
9851=20V
Package type
FVM=MSOP8
EFV=HTSSOP-B20
Taping type
TR=Reel-type embossed carrier tape (MSOP8)
E2=Reel-type embossed carrier tape (HTSSOP-B20)
MSOP8
<Dimension>
<Package specifications>
2.9 ± 0.1
Package style
Quantity
Embossed carrier tape
3000 pieces /reel
8
5
Packaging
direction
TR
(When holding a reel in left hand and pulling out the tape with
right hand, No. 1 pin appears in the upper right of the reel.)
0.475
1
4
0.22
+0.05
–0.04
0.145
+0.05
–0.03
0.08
M
0.65
0.08 S
No. 1 pin
Pulling-out side
HTSSOP-B20
<Dimension>
(unit : mm)
Reel
<Package specifications>
6.5 ± 0.1
Package style
Quantity
Embossed carrier tape (Moisture-proof specificatin)
2500 pieces /reel
20
11
Packaging
direction
E2
(When holding a reel in left hand and pulling out the tape with
right hand, No. 1 pin appears in the upper left of the reel.)
0.325
1
10
0.17
+0.05
+0.03
S
0.08 S
0.65
0.2
+0.05
+0.04
(unit : mm)
Reel
No. 1 pin
Pulling-out side
15/16
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