- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄379469 > UC1827-2 (Texas Instruments, Inc.) Buck Current/Voltage Fed Push-Pull PWM Controllers PDF資料下載
參數(shù)資料
| 型號： | UC1827-2 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Buck Current/Voltage Fed Push-Pull PWM Controllers |
| 中文描述： | 降壓電流/電壓美聯(lián)儲推挽式PWM控制器 |
| 文件頁數(shù)： | 5/15頁 |
| 文件大?。?/td> | 283K |
| 代理商： | UC1827-2 |
www.ti.com
ELECTRICAL CHARACTERISTICS
Unless otherwise spsecified, V
VCC
= 15 V, V
V+
= 14.3 V, C
CT
= 340 pF, R
RT
= 10 k
, R
DELAY
= 24.3 k
, V
SRC
= V
GND
= V
BUCK
=
V
PUSH
= V
PULL
outputs no load, T
J
= T
A
UC1827-1, UC1827-2
UC2827-1, UC2827-2
UC3827-1, UC3827-2
SLUS365A–APRIL 1999–REVISED AUGUST 2005
Terminal Functions (continued)
TERMINAL
N or
DW
I/O
DESCRIPTION
NAME
Q
5Soft-start pin requires a capacitor to GND. During soft-start the output of the voltage error amplifier is
clamped to the soft-start capacitor voltage which is slowly charged by an internal current source. In
UVLO, SS is held low.
A bidirectional pin for the oscillator., used to synchronize several chips to the fastest oscillator. Its input
synchronization threshold is 1.4 V. The SYNC voltage is 3.6 V when the oscillator capacitor, CT, is
discharged. Otherwise it is 0 V. If the recommended synchronization circuit is not used, a 1 k
or lower
value resistor from SYNC to GND may be needed to increase the fall time of the signal at SYNC.
A voltage source connected to this pin supplies the power for the UC3827. It is recommended to bypass
this pin to both GND and PGND ground connections with good quality high frequency capacitors
Non-inverting input of the voltage error amplifier
Inverting input of the voltage error amplifier
Output of the voltage error amplifier
Supply voltage for the buck output. The floating driver of the UC3827 uses the bootstrap technique
which requires a reservoir capacitor to store the required energy for the on time of the buck switch. A
diode must be connected from VCC to V+ to charge the reservoir capacitor. This diode must be able to
withstand V
IN
. The reservoir capacitor must be connected between V+ and SRC.
SS
4
5
O
SYNC
19
21
I
VCC
23
27
I
VEA+
VEA-
VEAO
14
16
10
15
18
11
I
I
O
V+
1
1
I
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY
VCC UVLO, Turn-on
Hysteresis
Supply current start
Supply current run
I
V+
buck high
8.3
0.9
8.8
1.2
9.5
1.5
V
V
μA
mA
mA
I
VCC
I
VCC
V
VCC
= 8 V
1000
32
1
45
2
0.2
VOLTAGE ERROR AMPLIFIER
IB
VIO
AVOL
GBW
(1)
Gain bandwidth
V
OL
Low-level output voltage
V
OH
High-level output voltage
CURRENT SENSE AMPLIFIER
IB
VIO
AVOL
GBW
(1)
Gain bandwidth
V
OL
Low-level output voltage
V
OH
High-level output voltage
CMRR
Common mode range
(1)
CURRENT ERROR AMPLIFIER
IB
VIO
AVOL
0.5
3
μA
mV
dB
MHz
V
V
10
80
95
4
0.3
1
I
VEAO
= 0 μA (No load)
I
VEAO
= 0 μA (No load)
0.5
3.20
2.85
3
–1
–5
5
μA
mV
dB
MHz
V
V
V
80
15
110
29
0.25
3.3
I
CEAO
= 0 μA (No load)
I
CEAO
= 0 μA (No load)
0.5
3
-0.3
2
–1
–5
10
μA
mV
dB
80
110
(1)
Ensured by design. Not production tested.
5
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UC1827J-2 | Buck Current/Voltage Fed Push-Pull PWM Controllers |
| UC3827 | Buck Current/Voltage Fed Push-Pull PWM Controllers |
| UC2845AJ | OMNIFET II: FULLY AUTOPROTECTED POWER MOSFET |
| UC2845AQTR | OMNIFET II: FULLY AUTOPROTECTED POWER MOSFET |
| UC285-x | FAST TRANSIENT REPONSE 5-A LOW-DROPOUT REGULATOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC1827J-1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Buck Current/Voltage Fed Push-Pull PWM Controllers |
| UC1827J-2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Buck Current/Voltage Fed Push-Pull PWM Controllers |
| UC1827L-1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Buck Current/Voltage Fed Push-Pull PWM Controllers |
| UC1827-X | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Buck Current/Voltage Fed Push-Pull PWM Controllers |
| UC182DW | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。