AP4312Q Datasheet, PDF (1/11 Pages) Diodes Incorporated – CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER

AP4312Q
CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER
Description
AP4312Q is an Automotive Grade product that is AEC-Q100 grade 1
qualified. It is a highly integrated solution for the constant
voltage/constant current mode SMPS application and linear DC/DC
regulator (used in Automotive application).
Pin Assignments
(Top View)
Pin 1 Mark
The AP4312Q contains one 1.21V voltage reference, one low voltage
reference used in current sensing circuit and two operational
amplifiers. The 1.21V voltage reference, combined with one
operational amplifier, makes of an ideal voltage controller for use in
adapters and battery chargers. The low voltage reference, combined
with another operational amplifier, makes of an ideal current limiter for
output low side current sensing.
V_{CTRL 1}
GND 2
V_OUT 3
6 VCC
5 V_SENSE
4
I_CTRL
The AP4312Q is fully compatible with AP4306 in functionality and
electrical characteristics except its lower reference voltage for current
control loop, thus higher power efficiency in SMPS applications such
as low power charger can be realized with AP4312Q compared to
AP4306.
Applications
SOT26
The AP4312Q is available in SOT26 package.
 Adapters
 Battery Chargers
 Automotive
Features
 Constant Voltage and Constant Current Control
 Precision Internal Voltage Reference
 Low External Component Count
 Easy Compensation
 Low Supply Current: 180A
 Current Control Loop Reference: 70mV
 Operating Supply Voltage: 1.7V to 18V
 Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2)
 Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AP4312Q
Document number: DS37444 Rev. 4 - 2
1 of 11
www.diodes.com
November 2015
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