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參數(shù)資料
| 型號(hào)： | UC1874N-1 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | High Efficiency, Synchronous, Step-down Buck Controllers |
| 中文描述： | 高效率，同步，降壓降壓控制器 |
| 文件頁(yè)數(shù)： | 8/10頁(yè) |
| 文件大小： | 350K |
| 代理商： | UC1874N-1 |
8
UC1874-1,-2
UC2874-1,-2
UC3874-1,-2
amplifier. An ultra low power sleep mode is also invoked
from the SS pin. A voltage level below 0.5V on this pin
reduces total standby current to less than 50mA. Short
circuit protection is inherent to the average current mode
technique with proper compensation of the current
amplifier. To prevent operation of the MOSFETs with an
inadequete drive signal, an undervoltage lockout circuit
suppresses the output drivers until the input supply
voltage is sufficiently high enough for proper operation.
The UC3874-1 is intended for applications with logic
level MOSFETs and its VCC turn-on and turn-off
thresholds are 4.5V/4.4V respectively. The UC3874-2 is
intended for applications with standard MOSFETs and
has UVLO turn-on and turn-off thresholds of 10V and 9V
respectively. The precision 2.5V reference can provide
20mA to power external circuitry. The reference output is
disabled during UVLO and sleep modes.
UC
874
–
ORDERING INFORMATION
UVLO Turn
On/Off
Threshold
1: 4.5V/4.4V
2: 10V/9V
Package
Temperature
Range
J: Ceramic DIL-18
N: Plastic DIL-18
DW: SOIC-18
1: –55°C to +125°C
2: –40°C to +85°C
3: 0°C to +70°C
4
5
6
7
8
9
10
11
-75
-25
25
75
125
TEMPERATURE °C
I
C
TYPICAL PERFORMANCE INFORMATION
Figure 1. Supply Current
1.95
1.96
1.97
1.98
1.99
2
2.01
2.02
2.03
2.04
2.05
-50
-25
0
25
50
75
100
TEMPERATURE °C
V
Figure 2. V
AMP
Input Voltage
80
90
100
110
120
130
140
-75
-25
25
75
125
TEMPERATURE °C
F
Figure 4. Oscillator Frequency vs. Temperature
(CT = 680pF)
560
600
640
680
720
760
-50
-25
0
25
50
75
100
TEMPERATURE °C
T
Figure 3. Volt Amp GM (I
OUT
=
10 A)
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| UC1874N-2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High Efficiency, Synchronous, Step-down Buck Controllers |
| UC1874Q-1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High Efficiency, Synchronous, Step-down Buck Controllers |
| UC1874Q-2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High Efficiency, Synchronous, Step-down Buck Controllers |
| UC1874QTR-1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| UC1874QTR-2 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
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