A8739EEETR-T Allegro Microsystems Inc, A8739EEETR-T Datasheet - Page 11

• Manufacturer Part Number: A8739EEETR-T
• Description: Photoflash Capacitor Charger
• Manufacturer: Allegro Microsystems Inc
• Type: Flash/Torchr

Specifications of A8739EEETR-T

• Number Of Outputs: *
• Internal Driver: No
• Type - Primary: Flash/Torch
• Voltage - Supply: *
• Mounting Type: Surface Mount
• Package / Case: 8-UFDFN Exposed Pad
• Operating Temperature: *
• Voltage - Output: *
• Frequency: *
• Current - Output / Channel: *
• Internal Switch(s): Yes
• Efficiency: 75%
• Topology: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 620-1365-2

A8739
Test conditions: V
Oscilloscope settings: Ch1 = ¯ D ¯ ¯ O ¯ ¯ N ¯ ¯ E ¯ (5 V / div), Ch2 = Output Voltage (50 V / div), Ch3 = Input Current (100 mA / div), Time scale = 1 sec / div
ILIM1 (1.5 A)
ILIM5 (1.22 A)
ILIM9 (0.93 A)
ILIM11 (0.79 A)
IN
= 3.0 V, V
BAT
= 3.7 V, C
Output Capacitor Charging at Various Peak Current Limits
C2,C3
C2,C3
C2,C3
C2,C3
Ultra-Small Mobile Adjustable Xenon Photoflash
C1
C1
C1
C1
OUT
= 100 μF / 330 V UCC, transformer = T-16-024A (L
Charging Waveforms
Capacitor Charger with IGBT Driver
t
V
V
V
V
V
V
V
V
DONE
DONE
DONE
DONE
I
I
I
I
OUT
OUT
OUT
OUT
IN
IN
IN
IN
PRIMARY
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
=12.8 μH, N = 10.25), at room temperature
11