LT1511CS8#PBF - 3A Multi-Chemistry Battery Charger | Analog Devices
Teilenummer: LT1511CS8#PBF ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $6.42 | $6,42 |
| 10 | $5.78 | $57,80 |
| 100 | $4.85 | $485,00 |
| 500 | $4.12 | $2.060,00 |
| 1.000 | $3.67 | $3.670,00 |
LT1511CS8#PBF Übersicht
A battery charger IC is a specialized power management integrated circuit that controls the charging process of rechargeable batteries, ensuring safety and longevity by regulating charge current and voltage. The LT1511 belongs to the family of switch-mode battery chargers, which use a PWM (pulse-width modulation) topology to efficiently convert input power to the battery. This places it within the broader hierarchy of power management ICs, specifically under battery management and charging solutions. Unlike linear chargers, switch-mode chargers like the LT1511 offer higher efficiency, especially when the input voltage is significantly higher than the battery voltage, reducing heat dissipation and enabling faster charging.
Key features of the LT1511CS8#PBF include its constant-current/constant-voltage charging algorithm, which is essential for Li-Ion batteries that require a controlled current phase followed by a constant voltage phase. The input current limiting feature allows the charger to draw a maximum current from the input supply, preventing overloading of wall adapters or USB ports. The device also includes a sense resistor for accurate current sensing and a programmable charge current via an external resistor. The 8-pin SOIC package provides a small footprint, and the device operates over a commercial temperature range of 0°C to 70°C.
Technically, the LT1511 uses a current-mode PWM architecture, which provides excellent line and load regulation. The switching frequency is internally set, and the device includes a shutdown pin for power management. The charger can be configured for different battery chemistries by adjusting the external components, such as the sense resistor and voltage divider. The input current limiting is particularly useful in applications where the input source has a limited current capability, such as a USB port or a solar panel.
Typical applications include portable devices, power tools, medical equipment, and industrial battery backup systems. The LT1511 is also suitable for charging lead-acid batteries in automotive and UPS applications, where its robust input voltage range and current limiting are advantageous. When designing with this device, it is important to select the appropriate sense resistor and inductor for the desired charge current and switching frequency, and to ensure proper thermal management, as the power dissipation in the IC can be significant at high charge currents.
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LT1511CS8#PBF Technische Daten
| Battery Type | Li-Ion, NiCd, NiMH, Lead-Acid |
| Input Voltage (Max) | 25 V (28 V abs max per Newark) |
| Battery Charge Voltage (Max) | 20 V |
| Charge Current (Max) | 3 A |
| Number of Series Cells | 3 |
| Charging Algorithm | Constant-Current / Constant-Voltage (CC/CV) |
| Input Current Limiting | Yes |
| Gehäuse | 8-SOIC (CS8) |
| Betriebstemperaturbereich | 0°C to 70°C |
| Montageart | Surface Mount |
| RoHS-Status | Compliant (#PBF suffix) |
| Lead-Free | Yes (#PBF suffix) |
LT1511CS8#PBF Pin-Konfiguration
| Pin 1 | VIN — Input supply voltage |
| Pin 2 | BAT — Battery connection |
| Pin 3 | SENSE — Current sense input |
| Pin 4 | GND — Ground |
| Pin 5 | PROG — Charge current programming |
| Pin 6 | SHDN — Shutdown control |
| Pin 7 | VCC — Internal supply |
| Pin 8 | SW — Switch node |
Typische Anwendungen
LT1511CS8#PBF ist geeignet für 6 Anwendungs: Portable Electronics Charging, Power Tools Battery Chargers, Medical Devices, Industrial Battery Backup Systems, Solar-Powered Chargers, Automotive Accessory Chargers.
Portable Electronics Charging
The LT1511CS8#PBF is ideal for charging Li-Ion batteries in portable devices such as smartphones, tablets, and power banks. Its 3A charge current enables fast charging, while the CC/CV algorithm ensures safe and efficient charging. The input current limiting allows it to draw power from USB ports without overloading them. The compact 8-SOIC package fits space-constrained designs, and the wide input voltage range accommodates various wall adapters. With proper thermal management, the device can deliver high charge currents while maintaining reliability.
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Power Tools Battery Chargers
In power tools, the LT1511CS8#PBF can charge NiCd, NiMH, or Li-Ion battery packs. Its 3A charge current is suitable for high-capacity packs, and the input current limiting prevents overloading the charger's power supply. The device's robust input voltage range (up to 25V) allows it to operate from a variety of AC adapters. The CC/CV charging profile is essential for Li-Ion packs, while NiCd and NiMH can be charged with appropriate termination. The compact package enables integration into tool chargers with limited PCB space.
Empfohlen
Medical Devices
Medical devices such as portable monitors and infusion pumps require reliable battery charging. The LT1511CS8#PBF's constant-current/constant-voltage charging ensures safe and predictable charging of Li-Ion batteries, which is critical for patient safety. The input current limiting protects the device's power supply, and the wide input voltage range allows operation from various medical-grade adapters. The device's commercial temperature range (0°C to 70°C) is suitable for most medical environments. Its small footprint is advantageous for compact medical devices.
Empfohlen
Industrial Battery Backup Systems
The LT1511CS8#PBF can be used in industrial battery backup systems to charge lead-acid or Li-Ion batteries. Its ability to handle input voltages up to 25V makes it suitable for 24V industrial supplies. The input current limiting prevents overloading the supply, and the CC/CV charging profile is appropriate for lead-acid batteries with proper voltage settings. The device's robust design and wide operating range make it reliable in industrial environments. The 8-SOIC package is easy to integrate into existing control boards.
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Solar-Powered Chargers
In solar-powered charging systems, the LT1511CS8#PBF's input current limiting is crucial to prevent overloading the solar panel. The device can charge batteries from a solar panel with varying output voltage, thanks to its wide input range. The CC/CV charging algorithm ensures efficient charging of Li-Ion or lead-acid batteries. The low quiescent current (if specified) helps maximize energy harvest. The compact package is suitable for portable solar chargers. Designers should ensure the solar panel's maximum power point is within the input voltage range.
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Automotive Accessory Chargers
The LT1511CS8#PBF can be used in automotive accessory chargers for charging devices like jump starters or portable power packs. Its input voltage range up to 25V allows it to operate from a 12V or 24V vehicle electrical system. The input current limiting prevents overloading the vehicle's power outlet. The device's CC/CV charging is suitable for Li-Ion batteries used in these accessories. However, the commercial temperature range (0°C to 70°C) may not be sufficient for under-hood applications, so it is best suited for cabin-mounted chargers.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für LT1511CS8#PBF – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | LT1510CS8#PBF | LT1511CSW#PBF | BQ24133RGYR |
|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 24-SOIC | 24-VQFN |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Max Charge Current | 3A | 1.5A | 3A | 3A |
| Input Voltage (Max) | 25V | 25V | 25V | 17V |
| Battery Charge Voltage (Max) | 20V | 20V | 20V | 15V |
| Battery Chemistry | Li-Ion, NiCd, NiMH, Lead-Acid | Li-Ion, NiCd, NiMH | Li-Ion, NiCd, NiMH, Lead-Acid | Li-Ion, Li-Pol |
| Operating Temperature Range | 0°C to 70°C | 0°C to 70°C | 0°C to 70°C | -40°C to 85°C |
| Input Current Limiting | Yes | Yes | Yes | Yes |
Wichtigste Unterscheidungsmerkmale
- Higher charge current (3A) compared to LT1510CS8#PBF (1.5A) (vs. LT1510CS8#PBF)
- Supports lead-acid batteries in addition to Li-Ion, NiCd, NiMH (vs. BQ24133RGYR)
- Higher input voltage range (25V) compared to BQ24133RGYR (17V) (vs. BQ24133RGYR)
Designhinweise
The LT1511CS8#PBF can dissipate significant power when charging at 3A, especially if the input voltage is much higher than the battery voltage. For example, with VIN=20V and battery voltage=12V, the power dissipation is approximately (20-12)*3 = 24W, which is excessive for an 8-SOIC package. Ensure adequate PCB copper area and consider using a lower charge current or a higher-efficiency topology if thermal issues arise.
Place the sense resistor and input/output capacitors close to the IC to minimize parasitic inductance and ensure accurate current sensing. Use a low-ESR ceramic capacitor on the input and output. The switch node (SW) should have a short, wide trace to reduce EMI. Follow the layout guidelines in the datasheet for optimal performance.
Do not exceed the absolute maximum input voltage of 28V. Ensure the battery voltage does not exceed the maximum charge voltage. The PROG pin sets the charge current; use a precision resistor to avoid overcharging. Also, the SHDN pin must be properly driven to enable charging; leaving it floating may cause unpredictable behavior.
Compliance-Informationen
RoHS compliant and lead-free as indicated by #PBF suffix. Not AEC-Q100 qualified. REACH and conflict minerals status not specified in provided data.
