LTC1729 - Li-Ion Battery Charger Termination Controllers
Datasheet 
DocumentationDatasheet
Design Note
Reliability Data
cad_symbol
Features
- Built-In Termination: 3-Hour Time-Out
- C/10 Detection with Status Indicator
- Trickle Charge Preconditioning If Cell <2.7V
- Charging Enabled When 0°C < T < 50°C
- Automatic Charger Present Detection
- Automatic Battery Present Detection
- 1- or 2-Cell, 4.1V/Cell or 4.2V/Cell Options
- Precision Internal 0.2% Voltage Feedback Divider
- Compatible with LT1505/LT1510/LT1511/LT1512/LT1513/LT1769
- Small Footprint/Low Profile
Typical Application
Description
The LTC1729 series is a family of smart termination controllers for lithium-ion battery chargers. These ICs provide trickle charge preconditioning, temperature charge qualification, time or charge current termination, automatic charger and battery detection and status output. Combining the LTC1729 series part with the LT®1510 (1.5A), LT1769 (2A), LT1511 (3A) and LT1505 (>4A) step-down chargers is a simple operation. Connecting six pins from the LTC1729 series part to the step-down chargers completes the integration. The LTC1729 termination controllers are also compatible with step-down/step-up (SEPIC) chargers, including the LT1512 (2A switch) and LT1513 (3A switch). The LTC1729 series is available in the 8-pin MSOP and SO packages.MS-8,SO-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC1729CMS8-4.1#PBF | MSOP | 8 | C | $2.75 | $2.40 |
| LTC1729CMS8-4.1#TRPBF | MSOP | 8 | C | $2.46 | |
| LTC1729CMS8-4.2#PBF | MSOP | 8 | C | $2.75 | $2.40 |
| LTC1729CMS8-4.2#TRPBF | MSOP | 8 | C | $2.46 | |
| LTC1729CMS8-8.2#PBF | MSOP | 8 | C | $2.75 | $2.40 |
| LTC1729CMS8-8.2#TRPBF | MSOP | 8 | C | $2.46 | |
| LTC1729CMS8-8.4#PBF | MSOP | 8 | C | $2.75 | $2.40 |
| LTC1729CMS8-8.4#TRPBF | MSOP | 8 | C | $2.46 | |
| LTC1729CS8-4.1#PBF | SO | 8 | C | $2.55 | $2.20 |
| LTC1729CS8-4.1#TRPBF | SO | 8 | C | $2.26 | |
| LTC1729CS8-4.2#PBF | SO | 8 | C | $2.55 | $2.20 |
| LTC1729CS8-4.2#TRPBF | SO | 8 | C | $2.26 | |
| LTC1729CS8-8.2#PBF | SO | 8 | C | $2.55 | $2.20 |
| LTC1729CS8-8.2#TRPBF | SO | 8 | C | $2.26 | |
| LTC1729CS8-8.4#PBF | SO | 8 | C | $2.55 | $2.20 |
| LTC1729CS8-8.4#TRPBF | SO | 8 | C | $2.26 | |
| LTC1729CMS8-4.1 | MSOP | 8 | C | $5.50 | $4.80 |
| LTC1729CMS8-4.2 | MSOP | 8 | C | $5.50 | $4.80 |
| LTC1729CMS8-8.2 | MSOP | 8 | C | $5.50 | $4.80 |
| LTC1729CMS8-8.4 | MSOP | 8 | C | $5.50 | $4.80 |
| LTC1729CS8-4.1 | SO | 8 | C | $5.10 | $4.40 |
| LTC1729CS8-4.2 | SO | 8 | C | $5.10 | $4.40 |
| LTC1729CS8-8.2 | SO | 8 | C | $5.10 | $4.40 |
| LTC1729CS8-8.4 | SO | 8 | C | $5.10 | $4.40 |
| LTC1729CMS8-4.1#TR | MSOP | 8 | C | $4.92 | |
| LTC1729CMS8-4.2#TR | MSOP | 8 | C | $4.92 | |
| LTC1729CMS8-8.2#TR | MSOP | 8 | C | $4.92 | |
| LTC1729CMS8-8.4#TR | MSOP | 8 | C | $4.92 | |
| LTC1729CS8-4.1#TR | SO | 8 | C | $4.52 | |
| LTC1729CS8-4.2#TR | SO | 8 | C | $4.52 | |
| LTC1729CS8-8.2#TR | SO | 8 | C | $4.52 | |
| LTC1729CS8-8.4#TR | SO | 8 | C | $4.52 |
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 |
|---|---|---|---|
| DC294A-B | LTC1729CMS8-4.2, LT1510-5CGN | Termination Controllers / Li-Ion Battery Charger, 8.2V to 20V Input, 4.2Vout @ 1A Max. (marking LTJH) | Contact Factory | |
| DC294A-D | LTC1729CMS8-8.4, LT1510-5CGN | Termination Controllers / Li-Ion Battery Charger, 11.5V to 28V Input, 8.4Vout @ 1A Max. (marking LTJG) | $150.00 | |
| DC299A-D | LT1769CGN, LTC1729CMS8 | 2A Li-Ion Battery Charger with Termination Controller, 12V to 25V Input, 8.4Vout @ 2A Max. | Contact Factory |