參數(shù)資料
型號(hào)： LTC1479
廠商： Linear Technology Corporation
英文描述： PowerPath Controller for Dual Battery Systems(雙電池系統(tǒng)電源通路控制器)
中文描述： PowerPath控制器的雙電池系統(tǒng)（雙電池系統(tǒng)電源通路控制器）
文件頁數(shù)： 4/24頁
文件大?。?/td> 374K
代理商： LTC1479
4
LTC1479
AC ELECTRICAL CHARACTERISTICS
V
DCIN
= 25V, V
BAT1
= 16V, V
BAT2
= 12V, T
A
= 25
°
C unless otherwise noted. (Note 2)
SYMBOL
t
ONGA/GB
t
ONGC/GD
t
ONGE/GF
t
OFFGA/GB
t
OFFGC/GD
t
OFFGE/GF
t
ONGG/GH
t
OFFGG/GH
f
OVGG
t
dLOBAT
t
dDCINGOOD
PARAMETER
Gate A/B Turn-On Time
Gate C/D Turn-On Time
Gate E/F Turn-On Time
Gate A/B Turn-Off Time
Gate C/D Turn-Off Time
Gate E/F Turn-Off Time
Gate G/H Turn-On Time
Gate G/H Turn-Off Time
V
GG
Reg Operating Frequency
LOBAT Delay Times
DCINGOOD Delay Times
CONDITIONS
V
GS
> 3V (Note 5)
V
GS
> 3V (Note 5)
V
GS
> 3V (Note 5)
V
GS
< 1V (Note 5)
V
GS
< 1V (Note 5)
V
GS
< 1V (Note 5)
V
GS
> 3V (Note 5)
V
GS
< 1V (Note 5)
MIN
TYP
30
30
30
3
3
3
300
5
30
5
5
MAX
UNITS
μ
s
μ
s
μ
s
μ
s
μ
s
μ
s
μ
s
μ
s
kHz
μ
s
μ
s
V
BDIV
=
±
100mV, R
PULLUP
= 51k
V
DCDIV
=
±
100mV, R
PULLUP
= 51k
The
G
denotes specifications which apply over the full operating
temperature range.
Note 1:
The logic inputs are high impedance CMOS gates with ESD
protection diodes to ground and therefore should not be forced below
ground. These inputs can however be driven above the V
CCP
or V
CC
supply
rails as there are no clamping diodes connected between the input pins
and the supply rails. This facilitates operation in mixed 5V/3V systems.
Note 2:
The Selected Operating Mode Truth Table, which defines the
operating conditions and logical states associated with each “normal”
operating mode, should be used in conjunction with the Electrical
Characteristics table to establish test conditions. Actual production test
conditions may be more stringent.
Note 3:
The following inputs are high impedance CMOS inputs:
3DM and DCIN/BAT and have no internal pull-up current.
Note 4:
The following inputs have built-in 2
μ
A pull-up current sources
(passed through series diodes): BATSEL, BATDIS and CHGSEL.
Note 5:
Gate turn-on and turn-off times are measured with no inrush
current limiting, i. e., V
SENSE
= 0V, using Si4936DY MOSFETs in the typical
application circuit.
TRUTH TABLE
SELECTED MODES
LOGIC INPUTS
SWITCH STATUS
SW
SW
CHGSEL
A/B
H
On
H
On
OUTPUTS
SW
E/F
Off
Off
SW
G
Off
On
SW
H
Off
Off
NO. MODE
1
DC Operation
2
DC Operation and
BAT1 Charging
3
DC Operation and
BAT2 Disconnected
4
DC Operation and
BAT2 Charging
5
BAT1 Operation
6
BAT2 Operation
7
BAT1 Low and
Disconnected
8
Backup Operation
9
No Power
(No Backup)
10 DC Reconnected
11 DC Connected
and Reset
3DM DCIN/BAT BATSEL
H
H
H
H
BATDIS
L
H
C/D
Off
Off
CHGMON
Hi-Z
BAT1
V
BAT
BAT1
BAT1
LOBAT
H
H
DCINGOOD
H
H
H
H
H
H
L
L
L
On
Off
Off
Off
Off
Hi-Z
BAT2
H
H
H
H
L
H
L
On
Off
Off
Off
On
BAT2
BAT2
H
H
H
H
H
L
L
L
H
L
H
H
H
L
H
H
H
Off
Off
Off
On
Off
Off
Off
On
Off
Off
Off
Off
Off
Off
Off
Hi-Z
Hi-Z
Hi-Z
BAT1
BAT2
BAT1
H
H
L
L
L
L
H
L
L
L
H
L
L
L
H
L
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Hi-Z
Hi-Z
BAT1
BAT2
L
L
L
L
L
H
L
H
H
H
L
L
H
H
3DM* 3DM* 3DM* Off
On
Off
Off
Off
Hi-Z
Hi-Z
BAT1
BAT1
L
L
H
H
Off
Off
(Selected Operating Modes)
*
3DM = Three Diode Mode. When this mode is invoked, only the first
MOSFET switch in each back-to-back switch pair, i. e., SW A, SW C and
SW E is turned on. Current may still pass through the inherent body
diode of the idled switches, i.e., SW B, SW D and SW F to help restart
the system after abnormal operating conditions have been encountered.
See the Timing Diagram and Applications Information sections for
further details.
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