MB3889 Datasheet, PDF (17/35 Pages) Fujitsu Component Limited. – 2-Channel DC/DC Converter IC with Overcurrent Protection Symmetrical-Phase Type

MB3889
s SETTING THE OUTPUT VOLTAGE
VO
R1
(−INE2) 15
1
−INE1
R2
(CS2) 13
CS1
3
Error Amp _{VO (V) =} ^1.23
−
R2
+
+
(R1 + R2)
1.23 V
< CH1, CH2 >
s SETTING THE TRIANGULAR OSCILLATION FREQUENCY
The triangular oscillation frequency is determined by the timing capacitor connected to the timing resistor (RT)
connected to the RT terminal (pin 5).
Triangular oscillation frequency: fOSC
fOSC (kHz) =:
14100
RT (kΩ)
17