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参数资料
| 型号： | 5962-88697012A |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, CQCC20 |
| 封装： | CERAMIC, LCC-20 |
| 文件页数： | 12/16页 |
| 文件大小： | 425K |
| 代理商： | 5962-88697012A |
UC1903
+VIN
REFERENCE
CIRCUIT
1.25V
Q2
Q1
Q3
R1
R2
R3
15 W
2.5kW
2.5V
OUTPUT
RA
RS
VADJ
BIAS
CANCELLATION
ANDMIRROR
CIRCUITS
I
=
O
V
ADJ
R4
8kW
R5
R6
R7
R8
1.84kW
0.16kW
1.84kW
IOC
IOD
Q5
Q4
IOB
IOA
TO
OVHYSTERESIS
CONTROL
OVTHRESHOLD
FAULTWINDOW
THREAHOLDandHYSTERESIS
CIRCUITS
UVTHRESHOLD
TO
UVHYSTERESIS
CONTROL
Typical Characteristics
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-55
-35 -15
5
25
45
65
85
105
125
T -JunctionTemperature-°C
J
ReferenceChange-%
Typical2.5VReference
vs
TemperatureCharacteristic
40
Delay-ms/
F
m
-55
-35 -15
5
25
45
65
85
105
125
T -JunctionTemperature-°C
J
TypicalFaultDelay
vs
TemperatureCharacteristic(C
270pF)
DELAY ≥
35
30
25
20
www.ti.com ........................................................................................................................................ SLUS233A – OCTOBER 1999 – REVISED SEPTEMBER 2008
Block Diagram
A.
The UC1903 fault window circuitry generates OV and UV thresholds centered around the 2.5-V reference. Window
magnitude and threshold hysteresis are proportional to the window adjust input voltage at Pin 4.
Figure 1. Operation and Application Information
Copyright 1999–2008, Texas Instruments Incorporated
5
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相关代理商/技术参数 |
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|---|---|
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