MB39A104
s
PIN DESCRIPTION
Pin No.
1
2
3
4
5
Symbol
VCCO
VH
OUT1
VS1
ILIM1
I/O
O
O
I
I
Descriptions
Output circuit power supply terminal (Connect to same potential as VCC pin.)
Power supply terminal for FET drive circuit (VH
=
V
CC
−
5 V)
External Pch MOS FET gate drive terminal
Overcurrent protection circuit input terminal
Overcurrent protection circuit detection resistor connection terminal. Set
overcurrent detection reference voltage depending on external resistor and
internal current resource (110
µA
at RT
=
24 kΩ)
PWM comparator block (PWM) input terminal. Compares the lowest voltage
among FB1 and DTC terminals with triangular wave and controls output.
Power supply terminal for reference power supply and control circuit
(Connect to same potential as the VCCO terminal)
Timer-latch short-circuit protection capacitor connection terminal
Error amplifier (Error Amp 1) output terminal
Error amplifier (Error Amp 1) inverted input terminal
Soft-start capacitor connection terminal
Triangular wave oscillation frequency setting resistor connection terminal
Triangular wave oscillation frequency setting capacitor connection terminal
Soft-start capacitor connection terminal
Error amplifier (Error Amp 2) inverted input terminal
Error amplifier (Error Amp 2) output terminal
Reference voltage output terminal
Output circuit ground terminal (Connect to same potential as GNDO
terminal.)
PWM comparator block (PWM) input terminal. Compares the lowest voltage
among FB2 and DTC terminals with triangular wave and controls output.
Overcurrent protection circit detection resistor connection terminal. Set
overcurrent detection reference voltage depending on external resistor and
internal current resource (110
µA
at RT
=
24 kΩ)
Overcurrent protection circuit input terminal
External Pch MOS FET gate drive terminal
Output circuit ground terminal (Connect to same potential as GND terminal.)
Power supply control terminal. Setting the CTL terminal at “L” level places IC
in the standby mode.
6
7
8
9
10
11
12
13
14
15
16
17
18
19
DTC1
VCC
CSCP
FB1
−INE1
CS1
RT
CT
CS2
−INE2
FB2
VREF
GND
DTC2
I
O
I
I
O
O
I
20
21
22
23
24
ILIM2
VS2
OUT2
GNDO
CTL
I
I
O
I
3
FUJITSU [ FUJITSU COMPONENT LIMITED. ]
