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부품번호 | LD7265A 기능 |
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기능 | Smart Photoflash Capacitor Charger | ||
제조업체 | Leadtrend | ||
로고 | |||
LD7265A
6/25/2008
Smart Photoflash Capacitor Charger with Integrated MOS
REV:01
General Description
The LD7265A is an ideal charge control IC for flash units
with internal soft start, adjustable charging current and
output voltage. It provides a proprietary charging algorithm
to speed up the charging with more efficiency. The LD7265A
operates in the constant peak current mode, while the peak
current limit can be adjusted to eight different levels
between 0.54A to 1.8A, by clocking the CHARGE Pin. As
well, LD7265A separates the source and sink pin of IGBT
driver, which enables the users to easily meet the
requirement of any different IGBT application.
The LD7265A is available in a space-saving DFN10
package and is ideal for DSC flash unit.
Features
• Adjustable Output Voltage
• 1.8V~6V Battery Voltage Range
• Tiny Transformer
• Integrated 45V Power Switch
• Programmable eight-level Current Limit
• Separate Source and Sink Pin of IGBT Driver
• Output Voltage Overcharge Protection
• Lower Charging Current Drop Compensation
Applications
• DSC Flash Unit
• Cell Phone with Camera
g Patented
Typical Application
D 1/FT 01P80
C2
1 2 0μ F
R1
130K
VDD
R1
1 0 0K
DO NE #
R2
1 30 K
R3
1K
IG BT Gate
RP
RN
T1*
VB AT
C1
2 2μ F
VCC
1μF
VCC
FB
LX
Cs/ 22 0 PF*
V BAT
LD7265A
DONE #
CHARG E
Charge
OUTP
OUTN
TR IGGER
GND
Tr ig ge r
* If LX pin spike is over 45V, please add Cs to reduce spike.
Cs< 220pF is recommended.
Fig.1
Leadtrend Technology Corporation
LD7265A-DS-01 June 2008
1
www.leadtrend.com.tw
Block Diagram
CHARGE
VCC
FB
DONE#
300nS
S/H
1 .1 5V
+
-
Done# Block
OUTP
OUTN
VCC
Trig ger
Block
Cha rgin g
Blo ck
VRE F/1 .1 5V
8-Le vel
Cu rren t
L imit
LD7265A
VCC
LX
VBAT
TRIGGER
GND
Absolute Maximum Ratings
VCC and VBAT Pin
FB pin
Charge, Trigger, DONE#, OUTP and OUTN pin
LX pin<200nS
DC
LX Current
Operating Temperature Range
Storage Temperature Range
Junction Temperature
Lead Temperature (Soldering, 10sec)
ESD Level (Human Body Model)
ESD Level (Machine Model)
-0.3V~6.5V
-0.45V~6.5V
-0.3V~6.5V
-0.3V~45V
-0.3V~40V
3.3A
-30°C to 85°C
-55°C to 125°C
125°C
260 °C
2KV
200V
Caution:
Stresses beyond the ratings specified in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only
rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not
implied.
Leadtrend Technology Corporation
LD7265A-DS-01 June 2008
4
www.leadtrend.com.tw
4페이지 Typical Performance Characteristics
Do ne#
Ch arg e
IIN
VOUT
Current Limit- IIM4
CO UT=1 00μ F
Fig.4 Charge Waveform VBAT=3V
Do ne#
Ch arg e
IIN
VOUT
Fig.6 Soft Start Function
Charg e
LD7265A
Done #
Char ge
IIN
VOUT
Current Limit- IIM4
CO UT=1 00μ F
Fig.5 Charge Waveform VBAT=4.2V
Char ge
ILX= IIM 1=0 .5 4A
Fig.7 Prima ry Side Current Lim it-IIM1
Char ge
I LX= I IM 4=1 .0 8A
Fig.8 Prima ry Side Current Lim it-IIM4
ILX= ILIM 8=1 .80A
Fig.9 Prima ry Side Current Lim it-IIM8
Leadtrend Technology Corporation
LD7265A-DS-01 June 2008
7
www.leadtrend.com.tw
7페이지 | |||
구 성 | 총 21 페이지수 | ||
다운로드 | [ LD7265A.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 |
LD7265A | Smart Photoflash Capacitor Charger | Leadtrend |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |