A8739EEETR-T Allegro Microsystems Inc, A8739EEETR-T Datasheet - Page 12

• 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 = Battery Voltage (1 V / div), Ch3 = Output Voltage (50 V / div), Ch4 = Input Current (100 mA V / div),
Time scale = 1 sec / div
IN
V
V
V
V
BAT
BAT
BAT
BAT
= 3.0 V, ILIM3 (1.36 A), C
= 3.0 V
= 3.7 V
= 4.2 V
= 5.0 V
C2,C3,C4
C2,C3,C4
C2,C3,C4
C2,C3,C4
Ultra-Small Mobile Adjustable Xenon Photoflash
Output Capacitor Charging at Various Battery Voltages
C1
C1
C1
C1
OUT
= 100 μF / 330 V UCC, transformer = T-16-024A (L
Capacitor Charger with IGBT Driver
t
V
V
V
V
V
V
V
V
V
V
V
V
DONE
DONE
DONE
DONE
I
I
I
I
OUT
BAT
OUT
BAT
OUT
BAT
OUT
BAT
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
12