A8739EEETR-T Allegro Microsystems Inc, A8739EEETR-T Datasheet - Page 10

• 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
Note: Peak switch current is limited by the maximum on-time and di/dt of the transformer primary
current; therefore, average input current drops at very low battery voltage.
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
R
BAT
1.5
Average Input Current versus Battery Voltage at Various ILIM
= 0 Ω, Transformer L
Ultra-Small Mobile Adjustable Xenon Photoflash
2.0
2.5
Battery Voltage (V)
PRIMARY
3.0
= 12.8 μH, N =10.25, V
3.5
Capacitor Charger with IGBT Driver
4.0
4.5
IN
5.0
=3.6 V, at room temperature
5.5
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
ILIM1 (1.50A)
ILIM3 (1.36A)
ILIM5 (1.22A)
ILIM7 (1.07A)
ILIM9 (0.93A)
ILIM11 (0.79A)
ILIM13 (0.65A)
ILIM15 (0.51A)
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