LT3585-0 LINER [Linear Technology], LT3585-0 Datasheet - Page 14

• Manufacturer Part Number: LT3585-0
• Description: Photofl ash Chargers with Adjustable Input Current and IGBT Drivers
• Manufacturer: LINER [Linear Technology]

APPLICATIO S I FOR ATIO
LT3585-0/LT3585-1
LT3585-2/LT3585-3
is 5V and IGBTIN is driven by a 5V signal. The typical
90% to 10% fall time is 125ns but varies with R
by Figure 7. The IGBT driver pulls a peak of 50mA when
driving an IGBT with minimal quiescent current. In the
low state, an active pull-down network is used during the
initial transition but is deactivated after an internal time
constant. This allows the IGBT driver’s quiescent current
14
Table 4. Recommended IGBTs
PART
CY25CAH-8F*
CY25CAJ-8F*
CY25BAH-8F
CY25BAJ-8F
GT8G133
*Packaged in 8-lead VSON-8 pacakge.
U
1 TO 2 Li-Ion
V
5V
IN
2 AA OR
DRIVE VOLTAGE (V)
U
V
BAT
C3
0.22 F
2.5
2.5
DANGER HIGH VOLTAGE! OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY
4
4
4
W
C1
4.7 F
DONE
CHRG/IADJ
V
IGBTPWR
IGBTIN
IN
V
BAT
LT3585-0
IGBTPU
IGBTPD
GATE
Figure 8. Complete Xenon Circuit
SW
BREAKDOWN VOLTAGE (V)
GND
U
PD
20 TO 160
1
2
Figure 9. IGBT Gate
given
1:10:2
•
R
T1
PD
400
400
400
400
400
•
4
5
D1
+
TO GATE OF IGBT
to drop to approximately 0.1µA during idle conditions.
The pull-down circuit will clamp the output below 0.8V for
currents not exceeding 10mA in its idle state. The pull-up
network is always active when the IGBTIN is greater than
1.5V. Table 4 is a list of recommended IGBT devices for
strobe applications. These devices are all packaged in
8-lead TSSOP packages unless otherwise noted.
EMITTER
C2
50 F
PHOTOFLASH
CAPACITOR
320V
3585 F09
COLLECTOR CURRENT
(PULSED) (A)
TRIGGER T
R1
1M
1
2
150
150
150
150
150
C4
2.2
600V
m
F
3585 F08
3
FLASHLAMP
A
C
VENDOR
Renesas
[phone]
www.renesas.com
Toshiba Semiconductor
[phone]
www.semicon.toshiba.co.jp/eng
3585f