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参数资料
| 型号： | UC3827Q-1 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PQCC28 |
| 封装： | PLASIC, LCC-28 |
| 文件页数： | 1/16页 |
| 文件大小： | 391K |
| 代理商： | UC3827Q-1 |
RD
Q
S
20
DELAY
23
GND 11
VCC
REF 15
RT 17
CT 18
SYNC 19
CSA 9
CSA+ 8
SS 4
CSAO 7
CEA 13
VEA 16
VEA+ 14
22
24
3
2
1
RAMP
CEA+
12
CEAO
VEAO
10
PULL
PGND
PUSH
SRC
BUCK
V+
DELAY
T
Q
REF
&
UVLO
SS
INHBT
UV
OSC
500 kHz
MAX
6
5
21
Current Sense
Amplifier
ILIM Comparator
+3 V
Current Error
Amplifier
PWM Comparator
0.7 V
Flying
Driver
Push/Pull
Drivers
OSC
UVLO
Voltage Error
Amplifier
+
SLUS365D
– APRIL 1999 – REVISED APRIL 2011
BUCK CURRENT/VOLTAGE FED PUSH-PULL
PWM CONTROLLERS
Check for Samples: UC2827-1, UC2827-2, UC3827-1, UC3827-2
1
FEATURES
DESCRIPTION
Ideal for Multiple Output and/or High
The UC3827 family of controller devices provides an
Voltage Output Voltage Converters
integrated control solution for cascaded buck and
Up to 500 kHz Operation
push-pull converters. These converters are known as
High Voltage, High Current Floating
current fed or voltage fed push-pull converters and
Driver for Buck Converter Stage
are ideally suited for multiple output and/or high
voltage output applications. In both current fed and
UC3827-1 Current Fed Controller has
voltage fed modes, the push-pull switches are driven
Push-Pull Drivers with Overlapping
at 50% nominal duty cycles and at one half the
Conduction Periods
switching frequency of the buck stage. In the current
UC3827-2 Voltage Fed Controller has
fed mode, the two switches are driven with a
Push-Pull Drivers with Nonoverlapping
specified over-lap period to prevent ringing and
Conduction Periods
voltage stress on the devices. In the voltage fed
mode, the two switches are driven with a specified
Average Current Mode, Peak Current
gap time between the switches to prevent shorting
Mode or Voltage Mode with Input
the transformer across the energy storage capacitor
Voltage Feedforward Control for Buck
and to prohibit excessive currents flowing through the
Power Stage
devices.
Wide Bandwidth, Low Offset,
The converter
's output voltage is regulated by pulse
Differential Current Sense Amplifier
width modulation of the buck switch. The UC3827
Precise Short Circuit Current Control
contains
complete
protection
and
PWM
control
functions for the buck converter. Easy control of the
floating switch is accomplished by the floating drive
circuitry. The gate drive waveform is level shifted to
support an input voltage up to 72 VDC.
BLOCK DIAGRAM
1
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.
PRODUCTION DATA information is current as of publication date.
Copyright
1999–2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
相关PDF资料 |
PDF描述 |
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| UC3842ADX | |
| UC3843ADX | |
| UC3843ADW | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| UC3843D1X | |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| UC3827Q-2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Current/Voltage-Mode SMPS Controller |
| UC3827QTR-1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Buck Current/Voltage Fed Push-Pull PWM Controllers |
| UC3827QTR-2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Current/Voltage-Mode SMPS Controller |
| UC3828 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:新型电流型PWM芯片 |
| UC382-ADJ | 制造商:TI 制造商全称:Texas Instruments 功能描述:FAST LDO LINEAR REGULATOR |
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