MB39A132QN-G-ERE1 Fujitsu Semiconductor America Inc, MB39A132QN-G-ERE1 Datasheet - Page 22

• Manufacturer Part Number: MB39A132QN-G-ERE1
• Description: IC CONV DC-DC LI-ION 32QFN
• Manufacturer: Fujitsu Semiconductor America Inc

Specifications of MB39A132QN-G-ERE1

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion)
• Operating Temperature: 25°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 865-1020

MB39A132
■ SETTING THE CHARGE VOLTAGE
22
The charge voltage (DC/DC converter output voltage) can be set by the input voltage to ADJ3 pin (pin 18)
and CELLS pin (pin 25). The ADJ3 pin can set charge voltage per cell. The value of charge voltage can be
freely set when the ADJ3 pin is connected to an external resistor. When the VREF level voltage or the GND
level voltage is input to the ADJ3 pin, the internal high-precision reference voltage set in advance can be
used. When the VREF level voltage or the GND level voltage is input to the CELLS pin, or the CELLS pin is
left unconnected, the number of series batteries can be set.
The correspondence between the ADJ3 pin, the CELLS pin and charge voltage (DC/DC converter output
voltage) is shown below.
• ADJ3 pin internal circuit
(1.1 V ≤ ADJ3 pin ≤ 2.2 V)
ADJ3 pin Input Voltage
2.4 V ≤ ADJ3 pin ≤ 3.9 V
(0 V ≤ ADJ3 pin ≤ 0.9 V)
External voltage setting
(ADJ3 ≥ 4.1V)
VREF pin
GND pin
ADJ3
18
CELLS
OPEN
OPEN
OPEN
OPEN
4.0 V
2.3 V
1.0 V
VREF
VREF
VREF
VREF
GND
GND
GND
GND
Comparator_A
Comparator_B
Comparator_C
pin
8.4 V
12.6 V
16.8 V
8.7 V
13.05 V
17.4 V
8.0 V
12.0 V
16.0 V
4 × ADJ3 pin voltage
6 × ADJ3 pin voltage
8 × ADJ3 pin voltage
circuit
Charge Voltage
Logic
2.175 V
2.1 V
2.0 V
VA
Selector
2 Cells × 4.20 V/Cell
3 Cells × 4.20 V/Cell
4 Cells × 4.20 V/Cell
2 Cells × 4.35 V/Cell
3 Cells × 4.35 V/Cell
4 Cells × 4.35 V/Cell
2 Cells × 4.00 V/Cell
3 Cells × 4.00 V/Cell
4 Cells × 4.00 V/Cell
2 Cells × 2 ×
ADJ3 pin voltage/Cell
3 Cells × 2 ×
ADJ3 pin voltage/Cell
4 Cells × 2 ×
ADJ3 pin voltage/Cell
VA
To Error Amp3
Remarks
DS04–27265–3E