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Overview
| Topology | Buck Converter |
| Input voltage | 12-20 V |
| Output 1 | 4 A |
| IC revision | 01A |
Description
The LTC1760 Smart Battery System Manager is a highly-integrated SMBus Level 3 battery charger and selector intended for products using dual smart batteries. Three SMBus interfaces allow the LTC1760 to servo to the internal voltage and currents measured by the batteries while allowing an SMBus Host device to monitor either battery’s status. Charging accuracy is determined by the battery’s internal voltage and current measurements, typically better than ±0.2%.A proprietary PowerPath architecture supports simultaneous charging or discharging of both batteries. Typical battery run times are extended by up to 10%, while charging times are reduced by up to 50%. The LTC1760 automatically switches between power sources in less than 10μs to prevent power interruption upon battery or wall adapter removal.The LTC1760 implements all elements of a version 1.1 “Smart Battery System Manager” except for the generation of composite battery information. An internal multiplexer cleanly switches the SMBus Host to either of the two attached Smart Batteries without generating partial messages to batteries or SMBus Host. Thermistors on both batteries are automatically monitored for temperature and disconnection information (SafetySignal).
Features
- SMBus Charger/Selector for Two Smart Batteries*
- Voltage and Current Accuracy within 0.2% of Value Reported by Battery
- Simplifies Construction of “Smart Battery System Manager”
- Includes All SMBus Charger V1.1 Safety Features
- Supports Autonomous Operation without a Host
- Allows Both Batteries to Discharge Simultaneously into Single Load with Low Loss (Ideal Diode)
- SMBus Switching for Dual Batteries with Alarm Monitoring for Charging Battery at All Times
- Pin Programmable Limits for Maximum Charge Current and Voltage Improve Safety
- Fast Autonomous Power Path™ Switching (<10µs)
- Low Loss Simultaneous Charging of Two Batteries
95% Efficient Synchronous Buck Charger
- AC Adapter Current Limiting* Maximizes Charge Rate
- SMBus Accelerator Improves SMBus Timing**
- Available in 48-Lead TSSOP Package
Typical applications
- Standalone Dual Smart Battery Chargers / Battery Backup Systems
- Portable Computers and Instruments
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(mm) | f(mm) | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | DF(%) | RISO | Ceramic Type | W(mm) | H(mm) | Fl(mm) | Packaging | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | Material | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 16 V(DC), 1.6 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 16 V(DC) | Length1.6 mm | – | Capacitance100 nF | Capacitance±10% | Rated Voltage16 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor3.5 % | Insulation Resistance5 GΩ | Ceramic TypeX7R Class II | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), 2 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | Length2 mm | – | Capacitance100 nF | Capacitance±10% | Rated Voltage25 V (DC) | Size0805 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor3.5 % | Insulation Resistance5 GΩ | Ceramic TypeX7R Class II | Width1.25 mm | Height0.8 mm | Pad Dimension0.5 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), 3.2 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | Length3.2 mm | – | Capacitance10 µF | Capacitance±20% | Rated Voltage25 V (DC) | Size1210 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance0.01 GΩ | Ceramic TypeX5R Class II | Width2.5 mm | Height2 mm | Pad Dimension0.75 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | |||||
 | WA-SNSR Self-Retaining Spacer, 6.4 mm, 4.8 mm | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWA-SNSR Self-Retaining Spacer | Length6.4 mm | Drilling in Panel4.8 mm | – | – | – | – | Operating Temperature -30 °C up to +85 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | MaterialPA66 | |||
 | WE-HCI SMT Flat Wire High Current Inductor, 10.5 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | Length10.5 mm | – | – | – | – | Size1050 | Operating Temperature -40 °C up to +150 °C | – | – | – | Width10.2 mm | Height4.7 mm | – | – | Inductance10 µH | Performance Rated Current9.5 A | Saturation Current @ 10%4 A | Saturation Current @ 30%8.5 A | DC Resistance16.3 mΩ | Self Resonant Frequency21 MHz | MaterialSuperflux |