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부품번호 | OB3370N 기능 |
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기능 | Cost Effective LED Controller | ||
제조업체 | On-Bright | ||
로고 | |||
OB3370N
Cost Effective LED Controller
GENERAL DESCRIPTION
OB3370N is a high integrated and cost effective
Light Emitting Diode (LED) driver optimized for
LCD monitor and LCD TV backlight application.
The OB3370N operates in voltage mode boost
topology with fixed frequency to regulate the LED
current. The LED current is sensed through an
external current sense resistor. The voltage across
the sensing resistor is compared with reference
level of 200mV, the error is amplified to control the
pulse width of the power switch thus to regulate
the current flowing the LED.
It offers both internal burst and external low
frequency PWM (LPWM) dimming methods for a
wide range of dimming control.
OB3370N integrates under voltage lockout (VCC
UVLO) and output over voltage protections that
prevent the damage in the event of abnormal
conditions. The output voltage level is monitored
through OVP pin and it turns off the converter if an
over voltage condition is present due to an open
circuit condition.
The OB3370N is available in SOP-8 Packages.
Product Specification
FEATURES
Voltage Mode PWM Controller
Flexible Dimming Mode Control:
| Internal burst dimming control
| External burst (LPWM) dimming control
0-2V DC voltage direct dimming control
without external circuits
Output Over Voltage Protections
Under Voltage Lockout
Soft Start
APPLICATIONS
LCD Monitor
LCD TV
Flat panel display
TYPICAL APPLICATION
Figure1. OB3370N Typical Application Schematic
©On-Bright Electronics
Confidential
-1-
OB_DOC_DS_3370NA0
Functional Block Diagram
OVP
2.0V
OVP
+ Comparator
_
OSC
300KHz
0.2V
+
EA
_
OB3370N
Cost Effective LED Controller
VDD
UVLO
Voltage &
Current
Reference
+
_
PWM
Comparator
Logic
Control
Dimming
Control
Gate Drive
GATE
GND
FB CMP
Figure2. OB3370N Functional Block Diagram
DIM BF/DMOD
©On-Bright Electronics
Confidential
-4-
OB_DOC_DS_3370NA0
4페이지 Reference Application
OB3370N
Cost Effective LED Controller
Figure4. OB3370N for internal burst dimming Reference Application Schematic
©On-Bright Electronics
Confidential
-7-
OB_DOC_DS_3370NA0
7페이지 | |||
구 성 | 총 10 페이지수 | ||
다운로드 | [ OB3370N.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
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 |
OB3370N | Cost Effective LED Controller | On-Bright |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |