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부품번호 | BLI9182 기능 |
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기능 | 2.0-A Synchronous Step-Down Converter | ||
제조업체 | SHANGHAI BELLING | ||
로고 | |||
BLI9182
4.3V to 18V Input, 2.0-ASynchronous Step-Down Converter with Fast Transient Response
Features
2.0-A Output Current
High Efficient Integrated FETs Optimized for
portable application:
95mΩ (High side) and 90mΩ (Low side)
High Efficiency
Up to 95% Efficiency @ 5V Input, 3.3V Output
Up to 93% efficiency @ 12V Input, 3.3V Output
Wide Input Voltage Range: 4.3V to 18V @ 2.0-A
loading
Wide Output Voltage Range: 0.918V to 14V @
2.0-A loading ( 32Watt 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 BLI9182 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 BLI9182 operates from 4.3-V to 18-V Vin
input, and the output voltage can be programmed
between 0.918V to 14v with 2.0A output current,
and +/-1.5% high accuracy output voltage.
Due to 95mΩ (High side) and 90mΩ (Low side)
integrated FETs, the BLI9182 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
0.1µF
R4 100K 2
1
IN
7
EN
BS 3
SW
8 FB 5
SS COMP G
64
C4
3.3nF
R3
2.2K
L1 10µH
R1 26.1K
1%
R2 10K
1%
Output
3.3V 2.3A
Cout
22µF/6.3V
Ceramic
X2
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V1.3
TYPICAL PERFORMANCE CHARACTERISTICS
Vin=12V,Vout=3.3V, L=10µH, Cin=10µF, Cout=22µF, TA=+25℃
Fast Transient Response (20A/µs)
BLI9182
Startup through Enable
1A Load Operation
2A Load Operation
Shutdown through Enable
Short Circuit Recovery
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V1.3
4페이지 APPLICATION NOTES
BLI9182
a) C2 ceramic 电容尽量靠近芯片的 PIN2 和 PIN4 放置;
b) 使用 47µH 电感时,由于每次 switching 传输的能量大,输出需要更大的电容,以使大信号的
反馈环路稳定。使用 47µH 电感时,输出须用大于或等于 330µF 的电解电容作能量 Bulk。
c) 大电流路径尽量短,且尽量与芯片在同一 PCB 层次。避免大电流路径打过孔跨层连接。
d) 若成本可行,在高效率设计中,应尽量使用瓷片电容或较小 ESR(如:30mohm)的电解电
容,效率可有效提升 1%.
e) EN 脚(第 7 脚)上拉电阻要求不低于 100K 欧。
f) 若多个芯片共享同一输入电容,需调节第 8 脚软起动电容的电容值分时延迟启动各芯片,以规
避多个芯片同时启动对电源输入电容产生冲击。延迟时间:每 100nF 电容延迟 15ms。
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V1.3
7페이지 | |||
구 성 | 총 8 페이지수 | ||
다운로드 | [ BLI9182.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
BLI9182 | 2.0-A Synchronous Step-Down Converter | SHANGHAI BELLING |
BLI9184 | 3.0-A Synchronous Step-Down Converter | SHANGHAI BELLING |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |