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Reliability Data
Product Selector Card
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Features
- Maximum Power Control: Solar Panel Input Compatible
- Complete High Performance Battery Charger When Paired with a DC/DC Converter
- Wide Input and Output Voltage Range: 3V to 60V
- Input Ideal Diode for Low Loss Reverse Blocking and Load Sharing
- Output Ideal Diode for Low Loss PowerPath™ and Load Sharing with the Battery
- Programmable Charge Current: ±1% Accuracy
- ±0.25% Accurate Programmable Float Voltage
- Programmable C/X or Timer Based Charge Termination
- NTC Input for Temperature Qualified Charging
- 28-Lead 4mm × 5mm QFN or SSOP Packages
Typical Application
Description
The LTC®4000-1 is a high voltage, high performance controller that converts many externally compensated DC/DC power supplies into full-featured battery chargers with maximum power point control. In contrast to the LTC4000, the LTC4000-1 has an input voltage regulation loop instead of the input current regulation loop.
Features of the LTC4000-1’s battery charger include: accurate (±0.25%) programmable float voltage, selectable timer or current termination, temperature qualified charging using an NTC thermistor, automatic recharge, C/10 trickle charge for deeply discharged cells, bad battery detection and status indicator outputs. The battery charger also includes precision current sensing that allows lower sense voltages for high current applications.
The LTC4000-1 supports intelligent PowerPath control. An external PFET provides low loss reverse current protection. Another external PFET provides low loss charging or discharging of the battery. This second PFET also facilitates an instant-on feature that provides immediate downstream system power even when connected to a heavily discharged or shorted battery.
The LTC4000-1 is available in a low profile 28-lead 4mm × 5mm QFN and SSOP packages.
| LTC4000 | LTC4000-1 | |
|---|---|---|
| Input Voltage Regulation MPPC | No | Yes |
| Input Current Monitoring | Yes | Yes |
| Input Current Regulation | Yes | No |
4x5 QFN-28,SSOP-28
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC4000EGN#PBF | SSOP | 28 | E | $5.90 | $4.13 |
| LTC4000EGN#TRPBF | SSOP | 28 | E | $4.19 | |
| LTC4000EGN-1#PBF | SSOP | 28 | E | $5.90 | $4.13 |
| LTC4000EGN-1#TRPBF | SSOP | 28 | E | $4.19 | |
| LTC4000EUFD#PBF | QFN | 28 | E | $5.64 | $3.95 |
| LTC4000EUFD#TRPBF | QFN | 28 | E | $4.01 | |
| LTC4000EUFD-1#PBF | QFN | 28 | E | $5.64 | $3.95 |
| LTC4000EUFD-1#TRPBF | QFN | 28 | E | $4.01 | |
| LTC4000IGN#PBF | SSOP | 28 | I | $6.43 | $4.50 |
| LTC4000IGN#TRPBF | SSOP | 28 | I | $4.56 | |
| LTC4000IGN-1#PBF | SSOP | 28 | I | $6.43 | $4.50 |
| LTC4000IGN-1#TRPBF | SSOP | 28 | I | $4.56 | |
| LTC4000IUFD#PBF | QFN | 28 | I | $6.23 | $4.36 |
| LTC4000IUFD#TRPBF | QFN | 28 | I | $4.42 | |
| LTC4000IUFD-1#PBF | QFN | 28 | I | $6.23 | $4.36 |
| LTC4000IUFD-1#TRPBF | QFN | 28 | I | $4.42 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1721B-B | LTC4000-1 Demo Board | 6V ≤ VIN ≤ 36V, Buck-Boost Battery Charger Controller with MPPC and PowerPath Manager, Vout = 14.6V @ 5A | $250.00 | |
| DC1830B-C | LTC4000EUFD-1 Demo Board I 20V ≤ VIN ≤ 60V, Battery Charger Controller and PowerPath Manager, MPPC, Vout = 14.6V @ 5A | $250.00 |