參數資料
型號： UC3842BD
廠商： MOTOROLA INC
元件分類： 穩(wěn)壓器
英文描述： HIGH PERFORMANCE CURRENT MODE CONTROLLERS
中文描述： 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO14
封裝： PLASTIC, SO-14
文件頁數： 1/16頁
文件大小： 401K
代理商： UC3842BD
HIGH PERFORMANCE
CURRENT MODE
CONTROLLERS
Order this document by UC3842B/D
D SUFFIX
PLASTIC PACKAGE
CASE 751A
(SO–14)
N SUFFIX
PLASTIC PACKAGE
CASE 626
D1 SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
8
1
8
1
14
1
Device
UC384XBD
UC384XBD1
UC384XBN
UC284XBD
UC284XBD1
UC284XBN
UC384XBVD
UC384XBVD1
UC384XBVN
X indicates either a 2 or 3 to define specific device part
numbers.
Operating
Temperature Range
Package
SO–14
SO–8
Plastic
SO–14
SO–8
Plastic
SO–14
SO–8
Plastic
ORDERING INFORMATION
TA = 0
°
to +70
°
C
TA = – 25
°
to +85
°
C
TA = –40
°
to +105
°
C
PIN CONNECTIONS
Compensation
NC
Voltage Feedback
NC
Current Sense
NC
RT/CT
Compensation
Voltage Feedback
Current Sense
RT/CT
Vref
VCC
Output
Gnd
Vref
NC
VCC
VC
Output
Gnd
Power Ground
(Top View)
8
7
6
5
1
2
3
4
1
2
3
4
14
13
12
11
5
6
7
10
9
8
(Top View)
1
MOTOROLA ANALOG IC DEVICE DATA
The UC3842B, UC3843B series are high performance fixed frequency
current mode controllers. They are specifically designed for Off–Line and
dc–to–dc converter applications offering the designer a cost–effective
solution with minimal external components. These integrated circuits feature
a trimmed oscillator for precise duty cycle control, a temperature
compensated reference, high gain error amplifier, current sensing
comparator, and a high current totem pole output ideally suited for driving a
power MOSFET.
Also included are protective features consisting of input and reference
undervoltage lockouts each with hysteresis, cycle–by–cycle current limiting,
programmable output deadtime, and a latch for single pulse metering.
These devices are available in an 8–pin dual–in–line and surface mount
(SO–8) plastic package as well as the 14–pin plastic surface mount (SO–14).
The SO–14 package has separate power and ground pins for the totem pole
output stage.
The UCX842B has UVLO thresholds of 16 V (on) and 10 V (off), ideally
suited for off–line converters. The UCX843B is tailored for lower voltage
applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).
Trimmed Oscillator for Precise Frequency Control
Oscillator Frequency Guaranteed at 250 kHz
Current Mode Operation to 500 kHz
Automatic Feed Forward Compensation
Latching PWM for Cycle–By–Cycle Current Limiting
Internally Trimmed Reference with Undervoltage Lockout
High Current Totem Pole Output
Undervoltage Lockout with Hysteresis
Low Startup and Operating Current
Simplified Block Diagram
5.0V
Reference
Latching
PWM
UndVCC
Lockout
Oscillator
Error
Amplifier
7(12)
VC
7(11)
Output
6(10)
Power
Ground
5(8)
Current
Sense
Input
3(5)
Vref
8(14)
4(7)
2(3)
1(1)
Gnd
5(9)
RT/CT
Voltage
Feedback
Input
R
R
+
–
UndVref
Lockout
Output
Compensation
Pin numbers in parenthesis are for the D suffix SO–14 package.
VCC
Motorola, Inc. 1996
Rev 1
相關PDF資料
PDF描述
UC3842BN HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC3842BD1 HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC3843A High Performance Current Mode Controllers(高性能電流模式控制器)
UC2842A High Performance Current Mode Controllers(高性能電流模式控制器)
UC2843A High Performance Current Mode Controllers(高性能電流模式控制器)
相關代理商/技術參數
參數描述
UC3842BD1 功能描述:電流型 PWM 控制器 PWM CONTROLLER RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
UC3842BD1013TR 功能描述:電流型 PWM 控制器 0.5mA Current Mode RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
UC3842BD1G 功能描述:電流型 PWM 控制器 52kHz 1A Current PWM w/96% Duty Cycle Max RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
UC3842BD1R2 功能描述:電流型 PWM 控制器 52kHz 1A Current PWM RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
UC3842BD1R2G 功能描述:電流型 PWM 控制器 52kHz 1A Current PWM w/96% Duty Cycle Max RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
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