NCP5080 Datasheet, PDF (9/12 Pages) ON Semiconductor – Xenon Photoflash Capacitor Charge with Photo Sense Interface

NCP5080
MCU
READY
V_CC
EN
GND
GND
C2
U1
8 _READY
7 _EN
2 _TRGFL
1 _PHREF
12 _PHSEN
10 _IPK-REF
9 _AGNG
NCP5080
GND
GND
+VBAT
10mF/6.3V
GND
C3
D1
1
22mF/315V
R3
VHT
VBAT ^{4 2}
T1 4
MURHS160T3G
X1
220k
T2
VSW 6
PGND 5
IGBT 3
VFB 11
1
3
LDT565630T
GND
R7
22R
GND
3
GND
1
3
C4
100nF/400V
TRIG_FLASH
2
GND
R1
11k
CI
10nF
R2
3.3M
VHT
GND
Figure 6. Simplified Xenon Flash Controller
On the other hand, since it is not possible to connect the high voltage trigger pin to the controller (MCU or other digital
device), the IGBT pin will be used to trig the SCR device necessary to fire the high voltage pulse as depicted in Figure 6.
http://onsemi.com
9