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參數(shù)資料
| 型號(hào)： | UC3827DWTR-2 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | TVS, S/M, QUAD, SOT23-6L, 5V |
| 中文描述： | 降壓電流/電壓美聯(lián)儲(chǔ)推挽式PWM控制器 |
| 文件頁數(shù)： | 6/15頁 |
| 文件大?。?/td> | 283K |
| 代理商： | UC3827DWTR-2 |
www.ti.com
UC1827-1, UC1827-2
UC2827-1, UC2827-2
UC3827-1, UC3827-2
SLUS365A–APRIL 1999–REVISED AUGUST 2005
ELECTRICAL CHARACTERISTICS (continued)
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
PARAMETER
TEST CONDITIONS
At 100 kHz, Measure Gain
I
CEAO
= 0 μA (No Load)
I
CEAO
= 0 μA (No Load)
MIN
TYP
4.5
0.25
3.5
MAX
UNIT
MHz
V
V
V
GBW
(1)
V
OL
V
OH
CMRR
OSCILLATOR SECTION
f
OSC
I
CT(dsch)
PWM COMPARATOR
D
MAX
D
MAX
BUCK OUTPUT STAGE
t
RISE
t
FALL
Gain bandwidth
2
0.5
3.3
-0.3
Common mode range
(1)
5
Frequency
CT discharge current
180
220
250
kHz
mA
3.5V at CT when CT removed
5
Minimum duty cycle
Maximum duty cycle
200 kHz
200 kHz
0%
95%
85%
91%
Rise time
Fall tIme
1 nF Load
(2)
1 nF, Load
I
BUCK
= –15 mA , V+ –BUCK
(3)
IBUCK = –150 mA, V+ –BUCK
(3)
I
BUCK
= 15 mA
(4)
I
BUC
K = 150 mA
(4)
40
30
1.5
100
80
2.5
2.5
0.4
1.2
ns
ns
V
V
V
V
V
OH
High-level output voltage
2
0.2
0.7
V
OL
Low-level output voltage
PUSH/PULL OUTPUT STAGES
t
RISE
Rise time
t
FALL
Fall tIme
Overlap time
Nonoverlapping time
(6)
1 nF load
1 nF load
1 nF loads
(5)
50
35
100
100
400
500
ns
ns
ns
ns
UCx827-1
UCx827-2
100
100
250
250
I
PUSH/PULL
= –10 mA, VCC – PUSH
(7)
2
3
V
V
OH
High-level output voltage
I
= –100 mA, VCC –
PUSH
(7)
I
PUSH/PULL
= 10 mA
(7)
I
PUSH/PULL
= 100 mA
(7)
2.5
3
V
0.2
0.6
0.8
1.2
V
V
V
OL
Low-level output voltage
REFERENCE
Reference voltage
Shor-circuit current
Line regulation
Load regulation
4.8
–35
5
5.2
–65
20
20
V
I
SC
V
REF
= 0V
0.5V < V
VCC
< 20 V
0 mA < I
IO
< 10 mA
–50
mA
mV
mV
5
8
SOFT START
V
OL
I
SS
Low-level output voltage saturation
Soft-start current
V
VCC
= 7 V
250
–12
500
–25
mV
μA
–5
(2)
(3)
(4)
(5)
Measure the rise time from when BUCK crosses 1 V until it crosses 9 V.
To force BUCK high, force V
CSAO
=2.5 V, V
CEAO
= 2.5 V, a 25-k
pulldown resistor from RAMP to ground, and V
CT
= 0.5 V.
To force BUCK low, force V
= 2.5 V, V
= 2.5 V, a 10-k
pulldown resistor from RAMP to ground, and V
= 3.5 V.
The overlap time is measured from the point at which the rising edge of PUSH/PULL crosses 5 V until the falling edge of PULL/PUSH
crosses 5V.
The non-overlap time is measured from the point at which the falling edge of PUSH/PULL crosses 5 V until the rising edge of
PULL/PUSH crosses 5 V.
To toggle PUSH or PULL into a desired state, pulse CT from 0.5 V to 3.5 V. PUSH and PULL toggle on the rising edge of CT.
(6)
(7)
6
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3827DWTR-2G4 | 功能描述:電流型 PWM 控制器 Buck Current/Voltage Fed Push-Pull RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC3827N-1 | 功能描述:電流型 PWM 控制器 Buck Current/Voltage Fed Push-Pull RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC3827N-1 | 制造商:Texas Instruments 功能描述:IC PWM CONTROLLER 3827 DIP24 |
| UC3827N-1G4 | 功能描述:電流型 PWM 控制器 Buck Crnt/Vltg Fed Push-Pull PWM Cntrlr RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC3827N-2 | 功能描述:電流型 PWM 控制器 Buck Current/Voltage Fed Push-Pull RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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