ACT43950
400 V Input, High-Efficiency, Programmable Constant Current Output Regulator
Key Features
- Input Voltage Range: 180V to 400V
- Full Charge Output Voltage: 24 V to (90% of V300 Input)
- (Average) Output Constant-Current: 1 A to 4 A Programmable
- Protections: UVLO and OVLO (V300, V12), TSD, I/O Open/Short
- 5 mm × 5 mm QFN
The ACT43950 is a constant-current (CC) output regulator for capacitor charger or battery charger applications, operating up to 400-V DC input voltage, with fully programmable output setpoints of constant-current target, full-charge and refresh-charge target voltage. The device employs a Qrovo proprietary hysteretic mode control for high conversion efficiency and stable charging operation. This charger IC supports both SiC (Silicon carbide) and output stage, together with a 68 µH inductor.
This CC output current regulator provides circuit blocks protecting the IC device and the system damage from overvoltage, under-voltage, over-temperature, IC pin open/short errors. This non-isolated solution simplifies dc-to-dc conversion of, roughly, 50 W to 0.5 kW range applications, compared with traditional solutions using bulky transformers.
The ACT43950 is available in a 40-pin, 5 mm x 5 mm, 0.4-mm pitch QFN package, with a total of 10 pins removed to maintain creepage distance(s) for the 400 V handling.
Typical Applications
- Pulsed Power Applications
- High Voltage Power Supplies
Product Categories
Application Categories
| Charger Topology | Constant Current Capacitor |
| Battery Cell Count | N/A |
| Min Input Voltage(V) | 180 |
| Max Input Voltage(V) | 400 |
| Input Voltage(V) | 180 to 400 |
| Pin Count | 30 |
| Max Charge Current(A) | 4 |
| Built-In LDO Regulator | No |
| USB On-The-Go (OTG) | No |
| Max OTG Current(A) | N/A |
| OTG Output Auto-Detection | N/A |
| Battery Cell Balancing | No |
| Interface | Enable |
| ADC | No |
| Package Type | QFN, 30-pin |
| Package(mm) | 5.0 x 5.0 |
| RoHS | Yes |
| Lead Free | Yes |
| Halogen Free | Yes |
| ITAR Restricted | No |
| ECCN | EAR99 |