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AP4312 (Not Recommended for new design)

NRND = Not Recommended for New Design

Constant Voltage and Constant Current Controller

Datasheet

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Description

The AP4312 is a highly integrated solution for a constant voltage/constant current mode SMPS application.

The AP4312 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.

The AP4312 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 AP4312 compared to AP4306.

Feature(s)

Constant Voltage and Constant Current Control
Precision Internal Voltage Reference
Low External Component Count
Easy Compensation
Low Supply Current: 180µA
Current Control Loop Reference: 70mV
Operating Supply Voltage: 1.7V to 18V

Application(s)

Battery Chargers

Product Specifications

Product Parameters

Constant VoltageReference Tolerance (%)	±0.5
ReferenceVoltage (V)	1.21
SupplyCurrent (mA)	0.18
V_CC Maximum Rating	18
V_{SENSE (mV)}	70

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2642	2023-09-05	2024-03-05	Device End of Life (EOL)