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PDF LD7266A Data sheet ( Hoja de datos )
| Número de pieza | LD7266A | |
| Descripción | Photoflash Capacitor Charger | |
| Fabricantes | Leadtrend | |
| Logotipo |  |
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LD7266A
3/1/2007
Photoflash Capacitor Charger with Integrated MOS
REV: 00
General Description
The LD7266A 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 charge photoflash capacitor quickly and efficiently. The
LD7266A could operate in constant charging current mode
or the mode with lowering the charging current at lower
battery voltage. As well, the built-in 45V power switch and
IGBT driver can save the board space.
The LD7266A is available in a space-saving MSOP10 or
DFN-10 package and is ideal for DSC flash unit.
Features
• Adjustable Charging Current and Output Voltage
• 1.8V~5V Battery Voltage Range
• Tiny Transformer
• Totem-Pole IGBT Driver
• Integrated 45V power switch
• Output Voltage Overcharge Protection
Applications
• DSC Flash Unit
• Cell Phone with Camera
g Patented
Typical Application
D1
T1
C2
140µF
R1
196K
VCC
1µF
VDD
R2
196K
R1
100K
Ready
R3
1.5K
IGBT Gate
RG
FB
SEC
1nF
VCC
LD7266A
LX
ISET
READ Y
CHARGE
OUT
GND
TRIGGER
1nF
Charge
Trigger
C1
22µF
VB AT
Ri/360K
Fig.1
Leadtrend Technology Corporation
LD7266A-DS-00 March 2007
1
1 page  
Typical Performance Characteristics
COUT=140µF
VOUT
Ready
Charge
IIN
Fig. 2 Charging Waveform VIN=3V, IIN=600mA
COUT=47µF
VOUT
Ready
Charge
IIN
LD7266A
VOUT
Ready
Charge
IIN
Temperature (°C )
Fig. 3 Charging Waveform VIN=4.2V, IIN=600mA
VOUT
Ready
Charge
IIN
Fig. 4 Charging Waveform VIN=3V, IIN=280mA
Fig. 5 Charging Waveform VIN=4.2V, IIN=280mA
VOUT
Charge
IIN
Trigger
Fig. 6 Charging Waveform VIN=4.2V
Leadtrend Technology Corporation
LD7266A-DS-00 March 2007
5
VOUT=100V
VDS
Fig. 7 VDS Waveform
5 Page 
Package Information
MSOP-10
LD7266A
Symbols
A
B
C
D
F
H
I
J
M
θ
Dimensions in Millimeters
MIN MAX
2.896
3.099
2.896
3.099
0.813
1.219
0.152
0.305
0.470
0.530
0.127
0.229
0.051
0.152
4.699
5.105
0.406
0.660
0° 6°
Dimensions in Inch
MIN MAX
0.114
0.122
0.114
0.122
0.032
0.048
0.006
0.012
0.018
0.020
0.005
0.009
0.002
0.006
0.185
0.201
0.016
0.026
0° 6°
Leadtrend Technology Corporation
LD7266A-DS-00 March 2007
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet LD7266A.PDF ] | |
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