Vcco - Fujitsu MB39A104 Datasheet

■ PIN DESCRIPTION
Pin No. Symbol
1

VCCO

2 VH
3 OUT1
4 VS1
5 ILIM1
6 DTC1
7 VCC
8 CSCP
9 FB1
−INE1
10
11 CS1
12 RT
13 CT
14 CS2
−INE2
15
16 FB2
17 VREF
18 GND
19 DTC2
20 ILIM2
21 VS2
22 OUT2
23 GNDO
24 CTL
I/O
⎯
Output circuit power supply terminal (Connect to same potential as VCC pin)
Power supply terminal for FET drive circuit (VH = V
O
O External P-ch MOS FET gate drive terminal
I Overcurrent protection circuit input terminal
Overcurrent protection circuit detection resistor connection terminal. Set
I overcurrent detection reference voltage depending on external resistor and
internal current resource (110 µA at R
PWM comparator block (PWM) input terminal. Compares the lowest voltage
I
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
O Error amplifier (Error Amp 1) output terminal
I 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
I Error amplifier (Error Amp 2) inverted input terminal
O Error amplifier (Error Amp 2) output terminal
O 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
I
among FB2 and DTC2 terminals with triangular wave and controls output.
Overcurrent protection circuit detection resistor connection terminal. Set
I overcurrent detection reference voltage depending on external resistor and
internal current resource (110 µA at R
I Overcurrent protection circuit input terminal
O 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
I
in the standby mode.
MB39A104
Descriptions
− 5 V)
CC
= 24 kΩ)
T
= 24 kΩ)
T
3