參數(shù)資料
型號(hào)： UC2904Q
英文描述： Power Supply Supervisor
中文描述： 電源監(jiān)控
文件頁數(shù)： 3/6頁
文件大?。?/td> 171K
代理商： UC2904Q
3
UC1902
UC2902
UC3902
ELECTRICAL CHARACTERISTICS:
Unless otherwise specified, T
A
= –55°C to +125°C for UC1902, –40°C to+85°C for
UC2902, 0°C to 70°C for UC3902, VCC = 5V, R
ADJR
= 1k
, V
ADJ
= 5V, COMP = 5nF capacitor to GND, V
SHARE–
= 0V, T
A
= T
J
.
PARAMETERS
TEST CONDITIONS
Share Sense Amplifier
Input Impedance
SHARE+ = 1V, SHARE– = 1V, SENSE = +10mV
200
resistor SHARE+ to GND, SHARE– = 1V, SENSE =
+10mV
Threshold
SENSE = 0V
CMRR SHARE
0
≤
SHARE–
≤
1V, SENSE = –2.5mV
AVOL from SHARE+ to ADJR
SENSE = –2.5mV, 5nF capacitor COMP to GND, 1k resistor
ADJR to GND
SENSE = –2.5mV, 5nF capacitor COMP to GND, 150
resistor ADJR to GND
Slew Rate
SHARE+ = Step of 0mV to 300mV through a 200
resistor,
R
COMP
= 500
resistor to 1.5V, SENSE = 10mV
Error Amplifier Section
Transconductance, SHARE+
to COMP
IOH
COMP = 1.5V, SHARE+
≥
+300mV, SENSE = +10mV
IOL
200
resistor SHARE+ to GND, COMP = 1.5V, SENSE =
+10mV
Input Offset Voltage
VIO/
V
SENSE
1k Resistor, ADJR to GND, –2.5mV < SENSE < –25mV
ADJ Amplifier
ADJR Low Voltage
SENSE = +10mV, 200
resistor SHARE+ to GND
ADJR High Voltage
SENSE = +10mV, SHARE+ = 1V
Current Gain ADJR to ADJ
ADJR Current = –0.5mA, ADJ = 2.5V, SENSE = +10mV,
SHARE+ = 1V
ADJR Current = –0.5mA, ADJ = 20V, SENSE = +10mV,
SHARE+ = 1V
ADJR Current = –10mA, ADJ = 2.5V, SENSE = +10mV,
SHARE+ = 1V
ADJR Current = –10mA, ADJ = 20V, SENSE = +10mV,
SHARE+ = 1V
MIN
TYP
MAX
UNIT
10
15
15
17
k
k
41
50
50
70
60
68
100
mV
dB
dB
50
66
dB
0.4
0.7
1
V/
μ
s
200
resistor SHARE+ to GND
3.2
4.5
5.5
mS
–400
100
–325
150
–230
200
μ
A
μ
A
15
–6
35
0
65
6
mV
mV/V
–1
1.4
0.96
0
1
mV
V
A/A
1.8
0.99
2.1
1
0.96
0.99
1
A/A
0.96
0.99
1
A/A
0.96
0.99
1
A/A
ADJ:
Current output of adjust amplifier circuit (NPN
collector).
ADJR:
Current adjust amplifier range set (NPN emitter).
COMP:
Output of error amplifier, input of adjust amplifier.
This is where the compensation capacitor is connected.
GND:
Local power supply return and signal ground.
SENSE:
Inverting input of current sense amplifier.
SHARE+:
Positive input from share bus or drive to share
bus.
SHARE-:
Reference for SHARE+.
VCC:
Local power supply (positive).
PIN DESCRIPTIONS
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