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参数资料
型号： TPS2398DGKRG4
厂商： TEXAS INSTRUMENTS INC
元件分类： 电源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封装： GREEN, PLASTIC, MSOP-8
文件页数： 21/27页
文件大小： 792K
代理商： TPS2398DGKRG4
TPS2398
TPS2399
SLUS562A JUNE 2003 REVISED SEPTEMBER 2003
3
www.ti.com
ELECTRICAL CHARACTERISTICS
VI(VIN) = 48 V with respect to RTN, VI(EN) = 2.8 V, VI(ISENS) = 0, all outputs unloaded, TA = 40_C to 85_C
(unless otherwise noted)(1)(2)
input supply
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ICC1
Supply current, RTN
VI(RTN) = 48 V
700
1000
A
ICC2
Supply current, RTN
VI(RTN) = 80 V
1000
1500
A
VUVLO_L
UVLO threshold, input voltage rising
To GATE pull-up, referenced to RTN
36
30
25
V
VHYS
UVLO hysteresis
1.8
2.3
3.0
V
enable input (EN)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VTH
Threshold voltage, input voltage rising
To GATE pull-up
1.3
1.4
1.5
V
VHYS_EN
EN hysteresis
22
60
90
mV
IIH
High-level input current
VI(EN) = 5 V
2
1
2
A
linear current amplifier (LCA)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VOH
High-level output, GATE
VI(ISENS) = 0 V
11
14
17
V
ISINK
Output sink current
VI(ISENS) = 80 mV, VO(GATE) = 5V, Fault mode
50
100
mA
II
Input current, ISENS
0 V < VI(ISENS) < 0.2 V
1
A
VREF_K
Reference clamp voltage
VO(IRAMP) = open
33
40
46
mV
VIO
Input offset voltage
VO(IRAMP) = 2 V
7
6
mV
ramp generator
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ISRC1
IRAMP source current, slow turn-on rate
VO(IRAMP) = 0.25 V
850
600
400
nA
ISRC2
IRAMP source current, normal rate
VO(IRAMP) = 1 V, 3 V
11
10
9
A
VOL
Low-level output voltage
VI(EN) = 0 V
5
mV
AV
Voltage gain, relative to ISENS
VO(IRAMP) = 1 V, 3 V
9.5
10.0
10.5
mV/V
overload comparator
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VTH_OL
Current overload threshold, ISENS
80
100
120
mV
tDLY
Glitch filter delay time
VI(ISENS) = 200 mV
2
4
7
s
fault timer
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VOL
Low-level output voltage
VI(EN) = 0 V
5
mV
ICHG
Charging current, current limit mode
VI(ISENS) = 80 mV, VO(FLTTIME) = 2 V
55
50
45
A
VFLT
Fault threshold voltage
3.75
4.00
4.25
V
IDSG
Discharge current, retry mode
TPS2399
VI(ISENS) = 80 mV, VO(FLTTIME) = 2 V
0.38
0.75
A
D
Output duty cycle
TPS2399
1
1.5
%
IRST
Discharge current, timer reset mode
VO(FLTTIME) = 2 V,VI(ISENS) = 0 V
1
mA
NOTES 1: All voltages are with respect to the VIN terminal unless otherwise stated.
2: Currents are positive into and negative out of the specified terminal.
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