 English |
|
|
|
|
|
|
|
| LM34923 Datasheet, PDF (4/26 Pages) National Semiconductor (TI) – EVAL evaluation board provides the design engineer with a fully | |||
| |||
| ◁ |
LM34923
SNVS695A â MARCH 2011 â REVISED FEBRUARY 2013
www.ti.com
Electrical Characteristics (continued)
Specifications with standard type are for TJ = 25°C only; limits in boldface type apply over the full Operating Junction
Temperature (TJ) range. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical
values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless
otherwise stated the following conditions apply: VIN = 48V(1).
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Current Limit
Current Limit Threshold
700
1175
1500
mA
Current Limit Response Time
Iswitch = 1.24A, Time to Switch Off
190
ns
TOFF-1
OFF time generator (test 1)
FB=0V, VIN = 75V
37
µs
TOFF-2
OFF time generator (test 2)
FB=2.3V, VIN = 75V
7.2
µs
TOFF-3
OFF time generator (test 3)
FB=0V, VIN = 10V
5.7
µs
TOFF-4
OFF time generator (test 4)
FB=2.3V, VIN = 10V
1.25
µs
On Time Generator
TON - 1
On-Time
Vin = 10V
Ron = 250K
2.2
3.3
4.51
µs
TON - 2
On-Time
Vin = 75V
Ron = 250K
300
450
565
ns
Remote Shutdown Threshold
Voltage at RT/SD rising
0.46
0.9
1.4
V
Remote Shutdown Hysteresis
60
mV
Minimum Off Time
Minimum Off Time
VIN = 6V
260
347
ns
Regulation and OV Comparators
FB Reference Threshold
Internal reference
Trip point for switch ON
2.4365 2.5
2.5625
V
FB Over-Voltage Threshold
Trip point for switch OFF
2.85
V
FB Bias Current
1
nA
Under Voltage Sensing
UVTH
UV Threshold
UVHYS
UV Hysteresis Current
UVBIAS
UV Bias Current
UVOVOL UVO Output Low Voltage
UVOIOH UVO Leakage Current
Thermal Shutdown
UV = 2V
UV = 3V
UV = 3V, IUVO = 5mA
UV = 2V, VUVO = 7.8V
2.4
2.5
2.6
V
2.7
5
7.3
µA
1
nA
360
600
mV
1
nA
Tsd
Thermal Shutdown Temp.
165
°C
Thermal Shutdown Hysteresis
20
°C
Thermal Resistance
θJA
Junction to Ambient
VSSOP Package
200
°C/W
4
Submit Documentation Feedback
Product Folder Links: LM34923
Copyright © 2011â2013, Texas Instruments Incorporated
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese