MB39A112 Datasheet, PDF (13/35 Pages) Fujitsu Component Limited. – 3-ch DC/DC Converter IC

s SETTING THE OUTPUT VOLTAGE
• CH1
VO
R1
2
−INE1
R2
CS1
1
MB39A112
Error Amp
−
+
+
1.00 V
1.00
VO (V) =
(R1 + R2)
R2
• CH2, CH3
VO
R1
(−INE3) ¹²
9
−INE2
R2
(CS3) 11
CS2
10
Error Amp
−
+
+
1.23 V
1.23
VO (V) =
(R1 + R2)
R2
s SETTING THE TRIANGULAR OSCILLATION FREQUENCY
The triangular oscillation frequency is determined by the timing capacitor (CT) connected to the CT terminal
(pin 6) and the timing resistor (RT) connected to the RT terminal (pin 5) .
Triangular oscillation frequency : fosc
1200000
fosc (kHz)=:
CT (pF) • RT (kΩ)
13