MB39A104_08 Datasheet, PDF (3/40 Pages) Fujitsu Component Limited. – 2-ch DC/DC Converter IC with Overcurrent Protection

MB39A104
■ PIN DESCRIPTION
Pin No. Symbol
I/O
1
VCCO
⎯
2
VH
O
3
OUT1
O
4
VS1
I
5
ILIM1
I
6
DTC1
I
7
VCC
⎯
8
CSCP
⎯
9
FB1
O
10
−INE1
I
11
CS1
⎯
12
RT
⎯
13
CT
⎯
14
CS2
⎯
15
−INE2
I
16
FB2
O
17
VREF
O
18
GND
⎯
19
DTC2
I
20
ILIM2
I
21
VS2
I
22
OUT2
O
23
GNDO
⎯
24
CTL
I
Descriptions
Output circuit power supply terminal (Connect to same potential as VCC pin)
Power supply terminal for FET drive circuit (VH = VCC − 5 V)
External P-ch 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 DTC1 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 DTC2 terminals with triangular wave and controls output.
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)
Overcurrent protection circuit input terminal
External P-ch 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.
3