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参数资料
| 型号： | UC2823BDWG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 2.2 A SWITCHING CONTROLLER, 1150 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | GREEN, SOIC-16 |
| 文件页数： | 1/18页 |
| 文件大小： | 477K |
| 代理商： | UC2823BDWG4 |
UC1823A,UC2823A,UC2823B,
UC3823A,UC3823B,UC1825A,
UC2825A,UC2825B,UC3825A,UC3825B
SLUS334D AUGUST 1995 REVISED NOVEMBER 2008
HIGHSPEED PWM CONTROLLER
FEATURES
D Improved Versions of the UC3823/UC3825
PWMs
D Compatible with Voltage-Mode or
Current-Mode Control Methods
D Practical Operation at Switching Frequencies
to 1 MHz
D 50-ns Propagation Delay to Output
D High-Current Dual Totem Pole Outputs
(2-A Peak)
D Trimmed Oscillator Discharge Current
D Low 100-A Startup Current
D Pulse-by-Pulse Current Limiting Comparator
D Latched Overcurrent Comparator With Full
Cycle Restart
DESCRIPTION
The UC3823A and UC3823B and the UC3825A and
UC3825B family of PWM controllers are improved
versions of the standard UC3823 and UC3825 family.
Performance enhancements have been made to several
of the circuit blocks. Error amplifier gain bandwidth product
is 12 MHz, while input offset voltage is 2 mV. Current limit
threshold is assured to a tolerance of 5%. Oscillator
discharge current is specified at 10 mA for accurate dead
time control. Frequency accuracy is improved to 6%.
Startup supply current, typically 100
A, is ideal for off-line
applications. The output drivers are redesigned to actively
sink current during UVLO at no expense to the startup
current specification. In addition each output is capable of
2-A peak currents during transitions.
BLOCK DIAGRAM
4
5
6
7
3
2
1
OSC
CLK/LEB
RT
CT
RAMP
EAOUT
NI
INV
8
9
15
SS
ILIM
VCC
1.25 V
10
GND
(60%)
1.0 V
E/A
1.2 V
0.2 V
OVER CURRENT
CURRENT
LIMIT
R
SD
5 V
SOFTSTART COMPLETE
R
SD
FAULT LATCH
RESTART
DELAY
T
13
11
14
VC
12
PWM
LATCH
9
mA
250
mA
R
S
*
RESTART
DELAY
LATCH
VREF
5.1 V
ON/OFF
UVLO
4 V
INTERNAL
BIAS
16
OUTA
OUTB
PGND
5.1 VREF
”B” 16V/10V
”A” 9.2V/8.4V
PWM COMPARATOR
UDG02091
VREF GOOD
* On the UC1823A version, toggles Q and Q are always low.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
www.ti.com
Copyright
2004 2008, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| UC2823BDWTR | 制造商:TI 制造商全称:Texas Instruments 功能描述:High Speed PWM Controller |
| UC2823BDWTRG4 | 制造商:Texas Instruments 功能描述:CURRENT MODE PWM CNTRLR 2A 16SOIC - Tape and Reel |
| UC2823BJ | 制造商:TI 制造商全称:Texas Instruments 功能描述:High Speed PWM Controller |
| UC2823BL | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| UC2823BN | 功能描述:电流型 PWM 控制器 High Speed PWM Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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