MB3785A Datasheet, PDF (4/29 Pages) Fujitsu Component Limited. – Switching Regulator Controller (4 Channels plus High-Precision, High-Frequency Capabilities)

MB3785A
(Continued)
Pin No.
33
CH4 38
39
14
15
16
17
18
45
42
19
23
20
21
22
Symbol
DTC4
VE4
OUT4
OSCIN
OSCOUT
RT
CT
VCC1
VCC2
GND
VREF
SCP
CTL1
CTL2
CTL3
I/O
Description
I CH4 dead time control pin.
I CH4 output current setting pin.
O CH4 totem-pole output pin.
—
This pin connects a ceramic resonator.
—
— _{This pin connects to a resistor for setting the triangular-wave frequency.}
— This pin connects to a capacitor for setting the triangular-wave frequency.
— Power supply pin for the reference power supply control circuit.
— Power supply pin for the output circuit.
— GND pin.
O _{Reference voltage output pin.}
— This pin connects to a capacitor for the short-circuit protection circuit.
I Power supply circuit and first-channel control pin.
When this pin is High, the power supply circuit and first channel are in
active state.
When this pin is Low, the power supply circuit and first channel are in
standby state.
I Second-channel control pin.
While the CTL1 pin is High
When this pin is High, the second channel is in active state.
When this pin is Low, the second channel is in the inactive state.
I Third and fourth-channel control pin.
While the CTL1 pin is High
When this pin is High, the third and fourth channels are in active state.
When this pin is Low, the third and fourth channels are in the inactive
state.
4