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부품번호 | BD6067GU 기능 |
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기능 | White Backlight LED Drivers | ||
제조업체 | ROHM Semiconductor | ||
로고 | |||
전체 30 페이지수
BD6067GU
LED Drivers for LCD Backlights
White Backlight LED Drivers
for Small to Medium LCD Panels
(Switching Regulator Type)
BD6067GU, BD6069GUT, BD6071HFN, BD6072HFN
No.11040ECT19
●Description
Switching Regulator type LED Driver Series for small LCD backlight are boost DC/DC converters possible to drive the white
LEDs at constant. It is possible that turning on white LED steadily by a series connection which has no current variation, and
by a fast transient response with current mode. And, BD6069GUT/BD6071HFN/BD6072HFN are white LED driver ICs with
synchronous rectification. With synchronous rectification (no external schottky diode required) and small package, they can
save mount space. BD6071HFN suited over voltage and over current limit from BD6069GUT/BD6072HFN.
●Features
1) Boost DC/DC converter
2) Adjustment of brightness by external PWM pulse
3) Possible to driving 3 LEDs (BD6071HFN )
4) Possible to driving 4 LEDs (BD6069GUT, BD6072HFN)
5) Possible to driving 8 LEDs (BD6067GU)
6) Soft start function (BD6067GU, BD6069GUT, BD6071HFN, BD6072HFN)
7) Synchronous rectification Boost DC/DC converter (BD6069GUT, BD6071HFN, BD6072HFN)
8) No external schottky diode required (BD6069GUT, BD6071HFN, BD6072HFN)
9) Output Open • Short protect (BD6069GUT, BD6071HFN, BD6072HFN)
●Applications
These drivers are applicable for various fields such as mobile phones, portable game machines, Inter-phone camera,
audio player, portable DVD player, back light for printer display etc… and support light of the camera for the mobile phone,
simple flash. And, these can use power supply for OEL.
●Line up matrix
Parameter
BD6067GU
BD6069GUT
BD6071HFN
BD6072HFN
Input
voltage range
2.7 ~ 5.5V
2.7 ~ 5.5V
2.7 ~ 5.5V
2.7 ~ 5.5V
Switching
frequency
0.8 ~ 1.2MHz
0.8 ~ 1.2MHz
0.8 ~ 1.2MHz
0.8 ~ 1.2MHz
White LED
number
5~8
4
3
4
Operating
temperature range
-30 ~ +85℃
-30 ~ +85℃
-30 ~ +85℃
-30 ~ +85℃
Package
VCSP85H1
VCSP60N1
HSON8
HSON8
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
1/29
2011.01 - Rev.C
BD6067GU, BD6069GUT, BD6071HFN, BD6072HFN
Technical Note
►BD6067GU
●Block Diagram and Recommended Circuit Example
L1
22µH
Vin
D1
Cin
1µF Vin SW
Thermal
Shutdown
TSD
S
Control
Q1 Q R
Current
Sence
300kΩ
Over voltage
protect
+
-
Vout
Output open
protect
+
-
PWMcomp
-
+
ERRAMP
-
+
14kΩ VFB
98kΩ
+ VDAC
OSC
Cout
1µF
20mA
R1
10Ω
GND GNDA
EN
OFF ON
Fig.11 Block Diagram and Recommended Circuit Example
C1 C2 C3
B1 B3
A1 A2 A3
Fig.12 Pin location diagram VCSP85H1 (Bottom view)
●Pin assignment table
Pin
number
Pin name
A1 GNDA
A2 EN
A3 VDAC
B1 Vin
B3 VFB
C1 VOUT
C2 SW
C3 GND
In/Out
-
In
In
-
In
In
In
-
Function
Analog GND
Enable control (pull-down by internal resistance)
Analog signal input for current adjustment
Supply voltage input
Feedback voltage input
Over voltage protection input SBD open protection input
Switching pin
Power GND
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
4/29
2011.01 - Rev.C
4페이지 BD6067GU, BD6069GUT, BD6071HFN, BD6072HFN
Technical Note
►BD6067GU
●Startup and Rush Current
BD6067GU has a built-in soft start function. This function prevents the rush current from being generated at startup time.
Vin
Cin
1µF
L1
22µH
Vin SW
D1
Thermal
Shutdown
TSD
Over voltage
protect
Output open
protect
+
-
+
-
Vout
Cout
1µF
ILED
S
Q1 Q R
Control
Current
Sence
300kΩ
GND GNDA
EN
Soft start circuit
PWMcomp
-
-
+
ERRAMP
-
+
14kΩ VFB
98kΩ
+
OSC
VDAC
VDAC
0~1.8V
R1
10Ω
OFF ON
Fig.17 Soft Start Circuit
●Application Circuit Example
The output maximum voltage range of BD6067GU is 30V.
*** When LED has 8 lights, special care should be taken to prevent output voltage (VOUT) from exceeding 30V.
VOUT = (LED vf × number of LED lights) + Vfb
Vin
Cin
1µF
L1
22µH
D1
Vin SW
Thermal
Shutdown
TSD
S
Control
Q1 Q R
Current
Sence
300kΩ
GND GNDA
EN
Over voltage
protect
Output open
protect
+
-
+
-
PWMcomp
-
+
ERRAMP
-
+
+
OSC
Vout
Cout
1µF
ILED
14kΩ VFB
98kΩ
VDAC
R1
10Ω
1µF
R2
10kΩ
1kHz
OFF ON
Fig.18 Example of Dimming Circuit Subject to PWM Control at the VDAC Pin
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
7/29
2011.01 - Rev.C
7페이지 | |||
구 성 | 총 30 페이지수 | ||
다운로드 | [ BD6067GU.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 |
BD6067GU | White Backlight LED Drivers | ROHM Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |