DC1887 is a DC/DC supercapacitor buck-boost charger and balancer converter featuring the LTC3128. The DC1887A operates over 1.72V to 5.5V input and charges the output up to 5.5V. Also, the LTC3128 has 2% precision input current limit, which allows the circuit to operate effectively with current limited input power sources like the USB.
The 1.2MHz switching frequency operation results in a small and efficient circuit. The converter provides high output voltage accuracy (typically ±2%) over a 1.72V to 5.5V input. The demonstration circuit can be easily modified to generate different output voltages.
| Manufacturer | Analog Devices Inc. |
|---|---|
| Category | Power Management |
| Sub-Category | Capacitor Chargers |
| Eval Board Part Number | DC1887A-ND |
| Eval Board Supplier | Analog Devices Inc. |
| Eval Board |
Normally In Stock
|
| Capacitor Type |
Super Capacitor
|
| Function |
Charger Controller
|
| Number of Capacitors |
2
|
| Voltage In |
1.72 ~ 5.5 V
|
| Voltage Out (Max) |
4.2 V
|
| Charge Current (Max) |
1 A
|
| Topology |
Buck-Boost
|
| Features |
±2% Output Accuracy
Active Charge Balancing Adjustable Output Voltage Power Fail Indicator Power Good Indicator Shutdown, Enable, Standby |
| Quiescent Current |
600 µA
|
| Component Count + Extras |
20 + 22
|
| Main I.C. Base Part |
LTC3128
|
| Design Author |
Linear Technology
|
| Date Created By Author | 2013-11 |
| Date Added To Library | 2019-06 |
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