Datasheet LT3652 (Analog Devices)

HerstellerAnalog Devices
BeschreibungPower Tracking 2A Battery Charger for Solar Power
Seiten / Seite26 / 1 — FEATURES. DESCRIPTION. Input Supply Voltage Regulation Loop for Peak. …
Dateiformat / GrößePDF / 534 Kb
DokumentenspracheEnglisch

FEATURES. DESCRIPTION. Input Supply Voltage Regulation Loop for Peak. Power Tracking in (MPPT) Solar Applications

Datasheet LT3652 Analog Devices

Modelllinie für dieses Datenblatt

Textversion des Dokuments

LT3652 Power Tracking 2A Battery Charger for Solar Power
FEATURES DESCRIPTION
n
Input Supply Voltage Regulation Loop for Peak
The LT®3652 is a complete monolithic step-down bat-
Power Tracking in (MPPT) Solar Applications
tery charger that operates over a 4.95V to 32V input n
Wide Input Voltage Range: 4.95V to 32V (40V Abs Max)
voltage range. The LT3652 provides a constant-current/ n
Programmable Charge Rate Up to 2A
constant-voltage charge characteristic, with maximum n
User Selectable Termination: C/10 or On-Board
charge current external y programmable up to 2A. The
Termination Timer
charger employs a 3.3V float voltage feedback reference, n
Resistor Programmable Float Voltage Up to 14.4V
so any desired battery float voltage up to 14.4V can be
Accommodates Li-Ion/Polymer, LiFePO4, SLA
programmed with a resistor divider.
Chemistries
The LT3652 employs an input voltage regulation loop, which n
No VIN Blocking Diode Required for Battery
reduces charge current if the input voltage falls below a
Voltages ≤ 4.2V
programmed level, set with a resistor divider. When the n 1MHz Fixed Frequency LT3652 is powered by a solar panel, the input regulation n 0.5% Float Voltage Reference Accuracy loop is used to maintain the panel at peak output power. n 5% Charge Current Accuracy n 2.5% C/10 Detection Accuracy The LT3652 can be configured to terminate charging n Binary-Coded Open-Collector Status Pins when charge current falls below 1/10 of the programmed n Thermally Enhanced 12-Lead 3mm maximum (C/10). Once charging is terminated, the LT3652 × 3mm DFN and MSE Packages enters a low-current (85µA) standby mode. An auto-re- charge feature starts a new charging cycle if the battery
APPLICATIONS
voltage falls 2.5% below the programmed float voltage. n Solar Powered Applications The LT3652 also contains a programmable safety timer, n Remote Monitoring Stations used to terminate charging after a desired time is reached. n LiFePO This al ows top-off charging at currents less than C/10. 4 (Lithium Phosphate) Applications n Portable Handheld Instruments L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the n 12V to 24V Automotive Systems property of their respective owners.
TYPICAL APPLICATION Solar Panel Input Voltage Regulation, Tracks Max Power Point to Greater Than 98% 2A Solar Panel Power Manager With 7.2V LiFePO4 Battery and 17V Peak Power Tracking
22 TA = 25°C CMSH1-40MA SOLAR PANEL INPUT 20 (<40V OC VOLTAGE) SYSTEM LOAD CMSH3-40MA 10µF 18 100% TO 98% PEAK POWER 530k CMSH3-40MA V SW IN LT3652 1µF V 10µH 16 IN_REG BOOST 0.05 100k SHDN 98% TO 95% PEAK POWER SENSE CHRG 14 BAT FAULT NTC 542k 10µF TIMER V 12 FB INPUT REGULATION VOLTAGE (V) 459k + 10k 10 B = 3380 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 CHARGER OUTPUT CURRENT (A) 2-CELL LiFePO4 (2 × 3.6V) BATTERY PACK 3652 TA01a 3652 TA01b 3652fe For more information www.linear.com/LT3652 1 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Package Description Typical Application Related Parts