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PDF BLI9184 Data sheet ( Hoja de datos )
| Número de pieza | BLI9184 | |
| Descripción | 3.0-A Synchronous Step-Down Converter | |
| Fabricantes | SHANGHAI BELLING | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de BLI9184 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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BLI9184
4.75V to 18V Input, 3.0-A Synchronous Step-Down Converter with +/-1.5% High Accuracy
Features
3.0-A Output Current
High Efficient Integrated FETs Optimized for
portable application:
85mΩ (High side) and 75mΩ (Low side)
High Efficiency
Up to 96% Efficiency @ 5V Input, 3.3V Output
Up to 94% efficiency @ 12V Input, 3.3V Output
Wide Input Voltage Range: 4.75V to 18V @
3.0-A loading
Wide Output Voltage Range: 0.923V to 14V @
3.0-A loading ( 54Watt output @max)
Low Output Ripple and Allows Ceramic Output
Capacitor
Thermal Shutdown Protection
340-KHz Switching Frequency(fsw)
Cycle By Cycle Over Current Limit
+/-1.5% High Accuracy Feedback Voltage
Applications
Wide Range of Applications for Low Voltage
System
- Digital TV Power Supply
- High Definition Blu-ray Disc Players
- Networking Home Terminal
- Digital STB
- Ideal for Portable Applications
Descriptions
The BLI9184 is a current mode synchronous
buck converter, and has a proprietary W-mode™®
Gm curvature circuit that enables fast transient
response, enables the device to adopt to both low
ESR output capacitors, such as POSCAP or
SP-CAP, and ultra-low ESR ceramic capacitors.
The BLI9184 operates from 4.75-V to 18-V Vin
input, and the output voltage can be programmed
between 0.923V to 14v with 3.0A output current,
and +/-1.5% high accuracy output voltage.
Due to 85mΩ (High side) and 75mΩ (Low side)
integrated FETs, the BLI9184 works in high
efficiency (up to 94% @12V Input, 3.3V output) .
Typical Application
Input 4.3V – 18V
C3 10nF
C1
10µF/25V
Ceramic
C8
0.47µF
R4 100K 2
1
IN
7
EN
BS 3
SW
8 FB 5
SS COMP G
64
C4
6.8nF
R3
2.2K
L1 10µH
R1 26.1K
1%
R2 10K
1%
Output
3.3V 3A
Cout
10µF/4.5V
Ceramic
X2
Page1
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1 page  
APPLICATION SCHEMATIC (1)
1) With Electrolytic Capacitor
Input 4.75V – 18V
R4 100K
C3 10nF
BLI9184
C1
220uF
Electrolytic
C2
10µF/25V
Ceramic
7
EN
2
IN
1
BS 3
SW
4
G
C5
Optional
COMP
FB
SS
5
6
C4
6.8nF
8
C8
0.47µF
R3
2.2K
L1 22µH
Output
5V 3.0A
R1 30K
1%
R2 6.8K
1%
Co2
470Uf/10V
Electrolytic
Co1
10µF/6.3V
Ceramic
Figure 1
Compatible with main competitors without any external component change!
RECOMMENDED COMPONENT SELECTION
Vout Cout
R1 R2
1.0V
1.2V
1.8V
2.5V
3.3V
5.0V
12V
470µF/6.3V/Electrolytic
470µF/6.3V/Electrolytic
470µF/6.3V/Electrolytic
470µF/6.3V/Electrolytic
470µF/6.3V/Electrolytic
470µF/10V/Electrolytic
470µF/25V/Electrolytic
1.0K
4.7K
9.7K
12.0K
26.1K
30.0K
62.0K
10K
15K
10K
6.8K
10K
6.8K
5.1K
R3
(comp)
50 Ω
100 Ω
300 Ω
1.5K Ω
2.2K Ω
2.7K Ω
3.3K Ω
C4
(comp)
10nF
10nF
6.8nF
6.8nF
6.8nF
6.8nF
6.8nF
C5
(optional)
100pF
100pF
100pF
100pF
100pF
100pF
100pF
L(inductor)
3.3µH
3.3µH
4.7µH
6.8µH
10µH
22µH
47µH
Page5
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V1.3
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet BLI9184.PDF ] | |
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