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UC3842ADTR 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
AC-DC转换器
封装:
SOIC-14
描述:
电流模式PWM控制器 Current Mode PWM Controller
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
原理图在P1
封装尺寸在P9P10P11P12P13P14P15P17P18
标记信息在P9P10P11P12P13P14P15P16
封装信息在P2P9P10P11P12P13P14P15P16P17P18
技术参数、封装参数在P2P8
应用领域在P16P28
电气规格在P3P4
导航目录
UC3842ADTR数据手册
Page:
of 28 Go
若手册格式错乱，请下载阅览PDF原文件
www.ti.com
(7) Gain defined as:
A +
DVPIN 1
DVPIN 3
, 0 v VPIN 3 v 0.8 V
UC1842/3/4/5
UC2842/3/4/5
UC3842/3/4/5
SLUS223C – APRIL 1997 – REVISED JUNE 2007
ELECTRICAL CHARACTERISTICS (continued)
Unless otherwise stated, these specifications apply for –55 ° C ≤ T
A
≤ 125 ° C for the UC184X; –40 ° C ≤ T
A
≤ 85 ° C for the
UC284X; 0 ° C ≤ T
A
≤ 70 ° C for the 384X; V
CC
= 15 V ; R
T
= 10 k Ω ; C
T
= 3.3 nF, T
A
= T
J
.
UC1842/3/4/5
UC3842/3/4/5
UC2842/3/4/5
PARAMETER TEST CONDITIONS UNIT
MIN TYP MAX MIN TYP MAX
ERROR AMP SECTION
Input Voltage V
PIN 1
= 2.5 V 2.45 2.50 2.55 2.42 2.50 2.58 V
Input Bias Current –0.3 –1 –0.3 –2 µ A
A
VOL
2 ≤ V
O
≤ 4 V 65 90 65 90 dB
Unity Gain Bandwidth T
J
= 25 ° C
(5)
0.7 1 0.7 1 MHz
PSRR 12 ≤ V
CC
≤ 25 V 60 70 60 70 dB
Output Sink Current V
PIN 2
= 2.7 V, V
PIN 1
= 1.1 V 2 6 2 6
mA
Output Source Current V
PIN 2
= 2.3 V, V
PIN 1
= 5 V –0.5 –0.8 –0.5 –0.8
V
OUT
High V
PIN 2
= 2.3 V, R
L
= 15 k Ω to ground 5 6 5 6
V
V
OUT
Low V
PIN 2
= 2.7 V, R
L
= 15 k Ω to Pin 8 0.7 1.1 0.7 1.1
CURRENT SENSE SECTION
Gain See
(6) (7)
2.85 3 3.15 2.85 3 3.15 V/V
Maximum Input Signal V
PIN 1
= 5 V
(6)
0.9 1 1.1 0.9 1 1.1 V
PSRR 12 ≤ V
CC
≤ 25 V
(5) (6)
70 70 dB
Input Bias Current –2 –10 –2 –10 µ A
Delay to Output V
PIN 3
= 0 V to 2 V
(5)
150 300 150 300 ns
OUTPUT SECTION
I
SINK
= 20 mA 0.1 0.4 0.1 0.4
Output Low Level
I
SINK
= 200 mA 1.5 2.2 1.5 2.2
V
I
SOURCE
= 20 mA 13 13.5 13 13.5
Output High Level
I
SOURCE
= 200 mA 12 13.5 12 13.5
Rise Time T
J
= 25°C, C
L
= 1 nF
(5)
50 150 50 150
ns
Fall Time T
J
= 25 ° C, C
L
= 1nF
(5)
50 150 50 150
UNDER-VOLTAGE LOCKOUT SECTION
X842/4 15 16 17 14.5 16 17.5
Start Threshold
X843/5 7.8 8.4 9.0 7.8 8.4 9.0
V
X842/4 9 10 11 8.5 10 11.5
Min. Operating Voltage After
Turn On
X843/5 7.0 7.6 8.2 7.0 7.6 8.2
PWM SECTION
X842/3 95% 97% 100% 95% 97% 100%
Maximum Duty Cycle
X844/5 46% 48% 50% 47% 48% 50%
Minimum Duty Cycle 0% 0%
TOTAL STANDBY CURRENT
Start-Up Current 0.5 1 0.5 1
mA
Operating Supply Current V
PIN 2
= V
PIN 3
= 0 V 11 17 11 17
V
CC
Zener Voltager I
CC
= 25 mA 30 34 30 34 V
(5) These parameters, although specified, are not 100% tested in production.
(6) Parameter measured at trip point of latch with V
PIN 2
= 0.
4
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