mb3843pfv Fujitsu Microelectronics, Inc., mb3843pfv Datasheet - Page 16

• Manufacturer Part Number: mb3843pfv
• Description: Lithium Ion Battery Charger Dc/dc Converter Ic High Precision With Constant-current Function
• Manufacturer: Fujitsu Microelectronics, Inc.

16
MB3813A/MB3833A/MB3843
2. Output Voltage Switching Function
3. Protection Functions
(1) Input voltage detector circuit (VIDET)
(2) Under voltage lockout circuit (UVLO)
SEL terminal voltage level
The SEL terminal (pin 10) is capable of output levels of 4.2 V or 4.1 V per battery cell.
• Output voltage settings by model
When the input voltage supply from the AC adapter or other source detected at the Vin1 terminal (pin 1) falls
below 11 V (MB3813A) , or below 7.3 V (MB3833A) , or below 6.3 V (MB3843) , the internal reference voltage
circuit switches off.
Power surges at power-on, or momentary under-voltage situations can cause abnormal operation in a control
IC, which may lead to damage or deterioration in systems. This circuit prevents abnormal peration during times
of low voltage by using the supply voltage to detect the level of the internal reference voltage, and switching off
the external output transistor to create a 100
the threshold voltage of the under voltage lockout circuit, operation is restored.
H
H
H
L
L
L
MB3813A
MB3833A
MB3843
Model
rest interval. Once the supply voltage recovers to a level above
Output voltage
12.6
12.3
8.4
8.2
4.2
4.1
Units
V
V
V
V
V
V