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參數(shù)資料
| 型號： | AN8049FHN |
| 廠商： | PANASONIC CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | 1.8-volt 3-channel step-up, step-down, and polarity inverting DC-DC converter control IC |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, QCC24 |
| 封裝： | 4 X 5 MM, PLASTIC, QFN-24 |
| 文件頁數(shù)： | 6/23頁 |
| 文件大小： | 170K |
| 代理商： | AN8049FHN |
AN8049FHN
Voltage Regulators
6
Pin No.
Equivalent circuit
Description
I/O
1
DT2:
Sets the channel 2 soft start time.
Set the time by connecting a capacitor
between this pin and ground.
Note that although the channel 2
maximum on duty is set internally to
86%, the maximum on duty can be set
to a value of 86% or less by inserting
a resistor between this pin and ground,
and can be set to a value of 86% or
more by inserting a resistor between
this pin and the V
REF
pin.
I
2
DT1:
Sets the channel 1 soft start time.
Set the time by connecting a capacitor
between this pin and ground.
Note that although the channel 1
maximum on duty is set internally to
86%, the maximum on duty can be set
to a value of 86% or less by inserting
a resistor between this pin and ground,
and can be set to a value of 86% or
more by inserting a resistor between
this pin and the V
REF
pin.
3
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.
t
DLY3
=
1.26 (V)
×
C
CTL3
(
μ
F)/1.1 (
μ
A) (s)
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
CC
. Note that
during U.V.L.O. and timer latch
operation, this pin is connected to
ground through a 20 k
resistor.
I
I
Terminal Equivalent Circuit
PWM2
50 k
50 k
1
7
15
20
PWM1
50 k
50 k
15
22
7
2
1.26 V
V
CC
20 k
1.1
μ
A
High
channel 3 operation
is turned off.
3
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| AN8049SH | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:1.8-volt 3-channel step-up, step-down, and polarity inverting DC-DC converter control IC |
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