The LD7261A 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, which charges photoflash capacitor quickly and efficiently. The LD7261A is specially designed for automatically and linearly lowering the charging current at lower battery voltage. A.
• Adjustable Charging Current
• Adjustable Output Voltage
• 1.8V~5V Battery Voltage Range
• Internal Soft Start
• Tiny Transformer
• Totem-Pole IGBT Driver
Applications
• DSC Flash Unit
• Film Camera Flash Unit
g Patent pending
Typical Application
VOUT
C2 140µF
ZD1 300V
D1 T1
VCC C3 1µF
VIN C1 33µF
VDD
VCC OUT1 FB
100nF 100K R1 100K
READY
IGBT RG GATE
SEC
ISET
RS CS 3.9Ω
LD7261A CHARGE
READY
OUT2
TRIGGER
GND
Q1: AOS / AO3402, T1: 10T: 250T, LP=8µH / EFD 6.5 CS: 4.7~10nF
Fig. 1
CHARGE TRIGGER
Q1 RI
Leadtrend Technology Corporation LD7261A-DS-00 March 2005
1
Pin Configura.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | LD7261 |
NEC |
HIGH POWER TRAVELING WAVE TUBE | |
2 | LD7261 |
Leadtrend |
Photoflash Capacitor Charger | |
3 | LD7260 |
NEC |
HIGH POWER TRAVELING WAVE TUBE | |
4 | LD7262 |
NEC |
HIGH POWER TRAVELING WAVE TUBE | |
5 | LD7263 |
NEC |
HIGH POWER TRAVELING WAVE TUBE | |
6 | LD7265A |
Leadtrend |
Smart Photoflash Capacitor Charger | |
7 | LD7266A |
Leadtrend |
Photoflash Capacitor Charger | |
8 | LD7267 |
NEC |
HIGH POWER TRAVELING WAVE TUBE | |
9 | LD7268 |
Leadtrend |
Photoflash Capacitor Charger | |
10 | LD7268A |
Leadtrend |
Photoflash Capacitor Charger | |
11 | LD7202 |
NEC |
HIGH POWER TRAVELING WAVE TUBE | |
12 | LD720DUQ-SCA1 |
LG |
WUXGA TFT LCD |