MB39A132QN-G-ERE1 Fujitsu Semiconductor America Inc, MB39A132QN-G-ERE1 Datasheet - Page 23

• 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

■ SETTING THE CHARGE CURRENT
DS04–27265–3E
(ADJ2 pin = GND pin to 4.4 V)
The error amplifier (Error Amp2) compares the output voltage of charge current control block set by the ADJ2
pin (pin 14) with the output signal from the charge current detection amplifier (Current Amp2), and outputs
a the PWM control signal. The maximum charge current for battery can be set according to the ADJ2 pin
voltage. When a current exceeding the setting current value is going to flow, constant current charge will be
executed at that setting current value, and the charge voltage will drop.
Battery charge current setting voltage: ADJ2
• ADJ2 pin internal circuit
• Example of the charge current setting (at R
ADJ2 pin input voltage
External Voltage Setting
Charge current upper limit I
(ADJ2 pin ≥ 4.6 V)
VREF pin
8.65 A
2.85 A
External setting when ADJ2 = 0 V to 4.4 V
ADJ2
0 V
Io
14
o
Charge current
=
output voltage
control block
Current detection amplifier gain (25 V/V Typ) × sense resistor R
V
4.5 V
+
−
1.5 V
ADJ2
Comparator_D
(V)
Output voltage in the charge current control block − 0.075
S
= 20 mΩ)
Internal reference voltage setting when ADJ2 = 4.6 V to VREF
1.5 V
2 × (ADJ2 pin − 0.075)(A)
4.41 V
4.4 V
Selector
R
4.59 V
S
2.85 A
= 20 mΩ
VREF
Charge current
ADJ2
To Error Amp2
2.66 × (ADJ2 pin − 0.075)
MB39A132
R
S
= 15 mΩ
3.8 A
(A)
S
(Ω)
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