MB39A132QN-G-ERE1 Fujitsu Semiconductor America Inc, MB39A132QN-G-ERE1 Datasheet - Page 44

• 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
44
(2) Constant current (CC) mode phase compensation circuit
In constant current mode, since the output capacitor impedance has little effects on the loop response
characteristic, connect the 1pole-1zero phase compensation circuit with the output pin (COMP2) of the error
amplifier 2 (gm amplifier).
1pole-1zero phase compensation circuit
RC and Cc of the phase lead circuit can be found by the following formula.
R
C
Rs
V
L
Co
f
CO
C
C
IN
: = 1.2 × 10
: =
: Charge current detection resistance [Ω]
: Switching power supply voltage [V]
: Inductor value [H]
: Output capacitance [F]
: Crossover frequency [Hz]
√L × Co
Rc
4
×
Rs × V
Rs
f
CO
× L
IN
+INC2
BATT
17
12
Current Amp2
+
-
Vrefint2
+
-
Error Amp2
COMP2
15
Rc
Cc
To PWM Comp.
DS04–27265–3E