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© Semiconductor Components Industries, LLC, 2015
September, 2015 − Rev. 2
1 Publication Order Number:
AND8490/D
AND8490/D
Theory and Applications of
the NCP1294, Switching
Controller, and Associated
Circuits for Lead Acid
Battery Charging from a
Solar Panel with Maximum
Peak Power Tracking
(MPPT)
Introduction
The following paper describes in detail the principle
operation of the NCP1294, switching controller, and
associated circuits for lead acid battery charging with
MPPT. A design example and test data are included.
The NCP1294 solar controller is a flexible solution used
in Module Level Power Management (MLPM) solutions.
Background and System Requirements
Most of the solar controller battery chargers on the market
today have a large digital content namely to manage
maximum power point tracking and battery charging. The
manipulation of the power stage, MPPT, and battery
management can be controlled with analog circuitry in a cost
effective manner. The solar controller parameters for the
NCP1294 design are listed below in tabular form.
Buck
Boost
Stage
MPP
Circuit
Reverse
Polarity
Protection
Remote
Thermal
Sensor
User Set
Battery
Voltage
Under
Voltage
Over Voltage
Battery
Charge
Circuit
User Set
Charge
Rate
Reverse
Polarity
Protection
Solar Panel
and Battery
Enable
Dusk Dawn
Detection
&
Battery
Discharge
Management
External LED Enable
Battery
Solar
Panel
Figure 1. Block Diagram of ON Semiconductor NCP1294 120W Solar Controller
www.onsemi.com
APPLICATION NOTE
Verzeichnis
