DC1220B is a Low Profile Regulated Dual Cell SuperCAP Charger featuring the LTC3225. The LTC3225 is a constant-current SuperCAP charger designed to charge two SuperCAPs in series to a fixed output voltage of 4.8V/5.3V from a 2.9V to 5.5V input supply. Automatic cell balancing is achieved during the charging phase.
Low input noise, low quiescent current and low external parts count make the LTC3225 ideally suited for small, battery-powered applications. Charging current level is programmed through an external resistor. Internal current limit and thermal shutdown circuitry allows the part to survive a continuous short-circuit from PROG to GND.
When the input supply is removed, the LTC3225 automatically enters a low current state, drawing less than 1µA from the SuperCAPs.
| Manufacturer | Analog Devices Inc. |
|---|---|
| Category | Power Management |
| Sub-Category | Capacitor Chargers |
| Eval Board Part Number | DC1220B-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 |
2.9 ~ 5.5 V
|
| Voltage Out (Max) |
5.3 V
|
| Charge Current (Max) |
150 mA
|
| Topology |
Buck-Boost
|
| Features |
Adjustable Output Current
Adjustable Output Voltage Automatic Cell Balancing Power Good Indicator Short Circuit Protection Shutdown, Enable, Standby Thermal Protection |
| Quiescent Current |
20 µA
|
| Component Count + Extras |
8 + 22
|
| Main I.C. Base Part |
LTC3225
|
| Design Author |
Linear Technology
|
| Date Created By Author | 2008-07 |
| Date Added To Library | 2019-05 |
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