Datasheet LTC4000-1 (Analog Devices)

LTC4000-1 High Voltage High Current Controller for Battery Charging with Maximum Power Point Control
FeaTures DescripTion
n
Maximum Power Control: Solar Panel Input
The LTC®4000-1 is a high voltage, high performance
Compatible
controller that converts many externally compensated n
Complete High Performance Battery Charger When
DC/DC power supplies into full-featured battery chargers
Paired with a DC/DC Converter
with maximum power point control. In contrast to the n
Wide Input and Output Voltage Range: 3V to 60V
LTC4000, the LTC4000-1 has an input voltage regulation n
Input Ideal Diode for Low Loss Reverse Blocking
loop instead of the input current regulation loop.
and Load Sharing
Features of the LTC4000-1’s battery charger include: n
Output Ideal Diode for Low Loss PowerPath™ and
accurate (±0.25%) programmable float voltage, select-
Load Sharing with the Battery
able timer or current termination, temperature qualified n
Programmable Charge Current: ±1% Accuracy
charging using an NTC thermistor, automatic recharge, n
±0.25% Accurate Programmable Float Voltage
C/10 trickle charge for deeply discharged cells, bad battery n Programmable C/X or Timer Based Charge detection and status indicator outputs. The battery charger Termination also includes precision current sensing that allows lower n NTC Input for Temperature Qualified Charging sense voltages for high current applications. n 28-Lead 4mm × 5mm QFN or SSOP Packages The LTC4000-1 supports intelligent PowerPath control. An
applicaTions
external PFET provides low loss reverse current protec- n tion. Another external PFET provides low loss charging Solar Powered Battery Charger Systems n or discharging of the battery. This second PFET also Battery Charger with High Impedance Input Source, facilitates an instant-on feature that provides immediate e.g., Fuel Cell or Wind Turbine n downstream system power even when connected to a Battery Equipped Industrial or Portable Military heavily discharged or shorted battery. Equipments L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and The LTC4000-1 is available in a low profile 28-lead PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. 4mm × 5mm QFN and SSOP packages.
Typical applicaTion 10.8V at 10A Charger for Three LiFePO4 Cells with a Solar Panel Input Solar Panel Input Regulation,
Si7135DP LT3845A VOUT SOLAR PANEL INPUT IN OUT
Achieves Max Power Point
12V, 15A <60V OPEN 5mΩ VC 100µF
to Greater than 98%
CIRCUIT VOLTAGE 1.15M 5mΩ 17.6V PEAK 14.7k 47nF 20 POWER VOLTAGE TA = 25°C ITH CC IID IGATE CSP (V) CSN 18 BGATE Si7135DP INREG BAT CLN TAGE: V 16 OFB IN 127k 1µF LTC4000-1 332k FBG TION VOL 14 V 133k BAT IFB 10.8V FLOAT 98% TO 95% PEAK POWER BFB 20k 3V 10A MAX CHARGE 12 1.13M CURRENT 100% TO 98% PEAK POWER NTC INPUT REGULA 10 IIMON TMR CL CX GND BIAS 10k 10k 3-CELL LiFePO4 1 2 3 4 5 6 7 8 9 10 BATTERY PACK 10nF CHARGER OUTPUT CURRENT: I 24.9k 22.1k RCS (A) 0.1µF 1µF 40001 TA01b 40001 TA01a 40001fa For more information www.linear.com/LTC4001-1 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts