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A8435 Datasheet(PDF) 2 Page - Allegro MicroSystems

Part No. A8435
Description  High Efficiency Charge Pump White LED Driver
Download  9 Pages
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
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A8435 Datasheet(HTML) 2 Page - Allegro MicroSystems

   
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High Efficiency Charge Pump White LED Driver
A8435
2
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Absolute Maximum Ratings
Package Thermal Characteristics
Input or Output Voltage
VIN, VOUT, C1+, C1–, C2+, and C2– pins...................... –0.3 to 6 V
All other pins.....................................................–0.3 to V
IN + 0.3 V
VOUT Short Circuit to GND ....................................................Continuous
Operating Ambient Temperature, TA ..................................... –40°C to 85°C
Maximum Junction Temperature, TJ(max) .............................................150°C
Storage Temperature, TS ................................................... –55°C to 150°C
Selection Guide
Part Number
Packaging*
Package Type
A8435EESTR-T
7-in. reel, 1500 pieces/reel
ES, 3 × 3 mm QFN/MLP-16
*Contact Allegro for additional packing options.
Package is lead (Pb) free, with 100% matte tin leadframe plating.
RθJA = 68 °C/W, on a 4-layer board
(vendor data; unverified)
Additional information is available on the Allegro Web site.
+ –
+
+ –
+ –
+ –
C1
Fractional Charge Pump
(1
× and 1.5×)
VIN
RSET
LED1
LED2
LED3
LED4
EN1
EN2
VOUT
C1+
C1 –
C2+
C2–
ISET
GND
1 µF
1 µF
C2
1 µF
1 µF
CIN
COUT
CTRL
Minimum Select
Current Mirror
Control, Clock,
and Reference
Functional Block Diagram


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