2 Cell / 3 Cell Narrow VDC Charger with SMBus Interface_BD99950MUV
The BD99950MUV is a high-efficiency, synchronous Narrow VDC system voltage regulator and battery charger controller. It has two charge pumps which separately drive N-channel MOSFETs for automatic system power source selection. Charge voltage, charge current, AC adapter current and minimum system voltage can be programmed through SMBus. With a small inductor, PWM switching frequency can also be programmed by SMBus up to 1.2MHz.
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特性：
Grade
Standard
Supply Voltage(Min.)[V]
6.0
Supply Voltage(Max.)[V]
24.0
Charge Voltage [V]
8.4±0.5%
Operating Temperature (Min.)[°C]
-10
Operating Temperature (Max.)[°C]
85
特点：
- N-channel MOSFETs available for Battery or
Adapter Selection via Internal Charge Pumps - Fast DPM Transient Response under Turbo Mode (<100µs)
- Linear Mode Trickle Charge via BGATE Charge Pump
- Low Operating Current BGATE Charge Pump at 17µA (typical)
- MLCC Output Capacitor
- High Light Load Efficiency for Energy Star and ErP Lot6
- Fast Load Current Transient Response under
No Battery or Dead Battery conditions - NMOS-NMOS Synchronous Step-Down Controller
- Programmable 600kHz-1.2MHz Switching Frequency
- Programmable Charge Voltage (16mV resolution),
Charger Current (64mA resolution),
Input Current (64mA resolution),
Minimum System Voltage (64mV resolution) - ±0.5% Charge Voltage Accuracy
- ±3% Charge Current Accuracy
- ±3% Input Current Accuracy
- ±0.5% Minimum System Voltage Accuracy
- ±2% 20x Input Current Amplifier Output Accuracy
- Integrated Loop Compensation
- Battery Learn Function
- AC Adapter Operating Range : 6.0V to 24.0V
- Off-State Battery Discharge Current at 15µA
- 20pin 3.5mm×3.5mm QFN Package