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Key Document
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SolarMagic SM3320-BATT-EV Charge Controller Reference Design (Rev. C)
(PDF 1207 KB)
06 May 2013 3,450views Read Abstract
Description
The SM72442 MPPT digital controller and SM72295 photovoltaic full bridge drivers are designed to control high efficiency DC/DC conversion used in photovoltaic applications. This application note will detail the usage of those devices in a battery charging application. The reference design is meant to provide support for a wide variety of implementations, however, unless otherwise noted, this reference design system is shown charging a 12V commercial automotive lead acid battery.
If the battery voltage is very low, a slow charge current is applied and limited until the voltage rises above a pre-set threshold value Vt. The full charge current is then applied. Once full charge is detected on the voltage of the battery, the system switches to a floating charge and maintains the battery voltage at a fixed threshold. At any time, the system will run in MPPT mode if the available power is lower than the power required to achieve voltage or current regulation.
Features
- 12V Lead Acid Battery
- Vin range = 15V to 45V Vmp (50V Voc)
- Max Input Current: Isc = 11A
- MPPT algorithm for optimized photovoltaic applications
- Up to 9A charging current
- Reverse current protection
- Trickle charge and fast charge mode
- Up to 98% converter efficiency
- 14.2V max charge voltage, 13.5V floating voltage
- Output voltage set-points can be re programmed
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| Part Number | Status | Lead-Free | RoHS |
SM3320-BATT-EV/NOPB:
|
ACTIVE | Yes | Yes |
Technical Documents
Application Notes (1)
| Title | Abstract | Type | Size (KB) | Date | Views | TI Recommends |
| 1207 | 06 May 2013 | 3,450 |
Related Products
Software (1)
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SolarMagic™ SM3320-BATT-EV Charge Controller Reference Design CAD Files
(ZIP, 3984 KB) 492 views, 27 Jan 2012
TI Devices (7)
| Part Number | Name | Product Family | |
|---|---|---|---|
| SM72238 | SolarMagic Micropower Voltage Regulators | Linear Regulator (LDO) | |
| SM72240 | SolarMagic 5-Pin Microprocessor Reset Circuit | Power Management | |
| SM72295 | Photovoltaic Full Bridge Driver | AC/DC and Isolated DC/DC Power Supply | |
| SM72375 | SolarMagic Dual Micro-Power Rail-to-Rail Input CMOS Comparator with Open Drain Output | Amplifiers and Linear | |
| SM72442 | Programmable Maximum Power Point Tracking Controller for Photovoltaic Solar Panels | Controller (External Switch) | |
| SM72480 | SolarMagic 1.6V, LLP-6 Factory Preset Temperature Switch and Temperature Sensor | Temperature Sensors and Control ICs | |
| SM72485 | SolarMagic 100V, 150 mA Constant On-Time Buck Switching Regulator | Linear Regulator (LDO) | |
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