參數(shù)資料
型號(hào)： UC1827
廠商： Texas Instruments, Inc.
英文描述： Buck Current/Voltage Fed Push-Pull PWM Controllers
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(yè)數(shù)： 2/15頁(yè)
文件大小： 283K
代理商： UC1827
www.ti.com
DESCRIPTION (CONTINUED)
The UC3827 can be set up in traditional voltage mode control using input voltage feedforward technique or in
current mode control. Using current mode control prevents potential core saturation of the push-pull transformer
due to mismatches in timing and in component tolerances. With average current mode control, precise control of
the inductor current feeding the push-pull stage is possible without the noise sensitivity associated with peak
current mode control. The UC3827 average current mode loop can also be connected in parallel with the voltage
regulation loop to assist only in fault conditions.
DISSIPATION RATINGS
UC1827-1, UC1827-2
UC2827-1, UC2827-2
UC3827-1, UC3827-2
SLUS365A–APRIL 1999–REVISED AUGUST 2005
Other valuable features of the UC3827 include bidirectional synchronization capability, user programmable
overlap time (UC3827-1), user programmable gap time (UC3827-2), a high bandwidth differential current sense
amplifier, and soft start circuitry.
ORDERING INFORMATION
(1)
PACKAGES
PDIP-24
UC1827J-1
UC1827J-2
UC2827N-1
UC2827N-2
UC3827N-1
UC3827N-2
T
A
= T
J
PUSH-PULL TOPOLOGY
SOIC-24
UC1827J-1
UC1827J-2
UC2827DW-1
UC2827DW-2
UC3827DW-1
UC3827DW-2
PLCC-28
Current Fed
Voltage Fed
Current Fed
Voltage Fed
Current Fed
Voltage Fed
-55°C to 125°C
-
-
-40°C to 85°C
UC3827Q-1
-
0°C to 70°C
(1)
The DW and Q packages are also available taped and reeled. Add a TR suffix to the device type (i.e., UC2827DWTR-1).
PACKAGE
(
θ
JA
) JUNCTION-TO-AMBIENT
TEMPERATURE (°C/W)
60
(1)
70 to 90
71 to 83
(3)
40-65
(1)
(
θ
JC
) JUNCTION-TO-WHAT
TEMPERATURE (°C/W)
30
28
(2)
24
(3)
30
24-pin (N)
24-pin (J)
28-pin (DW)
28-pin (QLCC)
(1)
Specified
θ
(junction-to-ambient) refers to devices mounted to 5-in
2
FR4 PC board with 1 oz. copper where noted. When a resistance
range is given, the lower values refer to a 5-in
2
aluminum PC board. The test PWB is 0.062 inches thick and typically used 0.635 mm
trace widths for power packages and 1.3 mm trace widths for non-power packages with a 100 × 100 mil probe land area at the end of
each trace.
Specified
θ
(junction-to-what) data values stated were derived from MIL-STD-1835B which states "
The baseline values shown are
worst case (mean + 2s) for a 60 x 60 mil microcircuit device silicon die and applicable for devices with die sizes up to 14400 mils
2
. For
device sizes greater than 14400 mils
2
use the following values; dual-in-line, 11 °C/W; flat pack, 10 °C/W; pin grid array, 10 °C/W pin grid
array, 10 °C/W
."
Modeled data. If there is a value range given for
θ
, the lower value refers to a 3 x 3 in., 1-oz, internal copper ground plane. The higher
value refers to a 1 x 1 in. ground plane. All model data assumes only one trace for each non-fused lead.
(2)
(3)
2
相關(guān)PDF資料
PDF描述
UC1827- Buck Current/Voltage Fed Push-Pull PWM Controllers
UC1827-2 Buck Current/Voltage Fed Push-Pull PWM Controllers
UC1827J-2 Buck Current/Voltage Fed Push-Pull PWM Controllers
UC3827 Buck Current/Voltage Fed Push-Pull PWM Controllers
UC2845AJ OMNIFET II: FULLY AUTOPROTECTED POWER MOSFET
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UC1827- 制造商:TI 制造商全稱:Texas Instruments 功能描述:Buck Current/Voltage Fed Push-Pull PWM Controllers
UC1827-1 制造商:TI 制造商全稱:Texas Instruments 功能描述:Buck Current/Voltage Fed Push-Pull PWM Controllers
UC1827-2 制造商:TI 制造商全稱:Texas Instruments 功能描述:Buck Current/Voltage Fed Push-Pull PWM Controllers
UC1827J-1 制造商:TI 制造商全稱:Texas Instruments 功能描述:Buck Current/Voltage Fed Push-Pull PWM Controllers
UC1827J-2 制造商:TI 制造商全稱:Texas Instruments 功能描述:Buck Current/Voltage Fed Push-Pull PWM Controllers
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