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參數資料
| 型號： | A8439EEJTR-T |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | Photoflash Capacitor Charger with IGBT Driver and Refresh |
| 中文描述： | 照相閃光燈電容充電器與IGBT驅動器和刷新 |
| 文件頁數： | 2/12頁 |
| 文件大小： | 537K |
| 代理商： | A8439EEJTR-T |
A8439-DS, Rev. 1
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Photoflash Capacitor Charger with IGBT Driver
A8439
2
Functional Block Diagram
VIN
VIN
SW
CHARGE
GND
CMP2
DONE
FB
Q
I
LIM
Decoder
Adjustable
Reference
IGBTDRV
TRIGGER
1.2 V
40 V
DMOS
Q
Q
SET
CLR
S
R
CMP3
CMP1
1.2 V
I
LIM
Comparator
CoDCM
H
→
L
Triggered Timer
Control Logic
Enable
18 μs
Terminal List Table
Number
1,10
Ab so ute Max mum Rat ngs
Input or Output Voltage
SW pin, V
SW
............................................................
–0.3 to 40 V
IGBTDRV pin, V
IGBTDRV
..............................
–0.3 to V
IN
+ 0.3 V
FB pin, V
FB
...............................................................
–0.3 to V
IN
All other pins, V
x
......................................................
–0.3 to 7 V
Operating Ambient Temperature, T
A
................................
–40°C to 85°C
Maximum Junction Temperature, T
J(max)
........................................
150°C
Storage Temperature, T
S
..............................................
–55°C to 150°C
10
9
8
7
6
NC
FB
DONE
TRIGGER
SW
1
2
3
4
5
NC
IGBTDRV
VIN
GND
CHARGE
Device Pin-out Diagram
R
θ
JA
= 45 °C/W, on a 4-layer board. Additional information is
available on the Allegro Web site.
Package Thermal Characteristics
Name
NC
Function
No connection
2
IGBTDRV
IGBT driver gate drive output
3
VIN
Power supply input
4
GND
Device ground
5
CHARGE
Charging enable and ISWLIM code
input; set to low to power-off the A8439
6
SW
Switch, internally connected to the
DMOS power FET drain
7
TRIGGER Strobe signal input
8
ˉD ˉO ˉN ˉˉ
Open drain, when pulled low by internal
MOSFET, indicates that charging target
level has been reached
9
FB
Output voltage feedback
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