an8049sh Panasonic Corporation of North America, an8049sh Datasheet - Page 7

• Manufacturer Part Number: an8049sh
• Description: 1.8-volt 3-channel Step-up, Step-down, And Polarity Inverting Dc-dc Converter Control Ic
• Manufacturer: Panasonic Corporation of North America

I Terminal Equivalent Circuits (continued)
Pin No.
4
5
6
20 kΩ
20 kΩ
4
5
6
1.1 µA
1.1 µA
45 kΩ
55 kΩ
Equivalent circuit
1.26 V
1.26 V
9 24 17
V
V
CC
CC
High
Channel 3
output operation
High
Channel 2
output operation
PWM1
SDH00012BEB
DT1:
Sets the channel 1 soft start time.
Set the time by connecting a capacitor between
this pin and ground.
(See the "Application Notes, [7]" section.)
Note that although the channel 1 maximum on
duty is set internally to 86%, the maximum on
duty can be adjusted by connecting resistors
between this pin and ground, and between this
pin and the V
(See the "Application Notes, [6]" section.)
CTL3:
Controls the on/off state of channel 3. A delay
can be provided in the power supply turn-on start
time by connecting a capacitor between this pin
and ground.
(See the "Application Notes, [9]" section.)
t
This pin can also be used to control the on/off
state with an external signal. In that case, the
allowable input voltage range is from 0 V to V
Note that during U.V.L.O. and timer latch
operation, this pin is connected to ground through
a 20 kΩ resistor.
CTL2:
Controls the on/off state of channel 2. A delay
can be provided in the power supply turn-on start
time by connecting a capacitor between this pin
and ground.
(See the "Application Notes, [9]" section.)
t
This pin can also be used to control the on/off
state with an external signal. In that case, the
allowable input voltage range is from 0 V to V
Note that during U.V.L.O. and timer latch
operation, this pin is connected to ground through
a 20 kΩ resistor.
DLY3
DLY2
= 1.26 (V) × C
= 1.26 (V) × C
REF
Description
pin.
CTL3
CTL2
(µF)/1.1 (µA) (s)
(µF)/1.1 (µA) (s)
AN8049SH
CC
CC
.
.
I/O
I
I
I
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