參數(shù)資料
型號: UCC35706DGKTR
廠商: Texas Instruments, Inc.
英文描述: Aluminum Electrolytic Radial Lead High Ripple Capacitor; Capacitance: 330uF; Voltage: 400V; Case Size: 25x50 mm; Packaging: Bulk
中文描述: 高-高速電壓模式脈沖寬度調制模式
文件頁數(shù): 7/18頁
文件大?。?/td> 353K
代理商: UCC35706DGKTR
SLUS473A
NOVEMBER 1999
REVISED MARCH 2001
7
www.ti.com
FUNCTIONAL DESCRIPTION
component selection for oscillator with duty cycle clamp (MODE = 1)
For a power converter with the following specifications:
V
IN(min)
= 18 V
V
IN(max)
= 75 V
V
IN(shutdown)
= 15 V
F
OSC
= 1 MHz
D
MAX
= 0.78 at V
IN(min)
In this mode, the on-time is approximately:
T
ON(max)
= 780 ns
T
OFF(min)
= 220 ns
V
FF(min)
=
= 1.20 V
(1) Pick C
T
= 220 pF.
(2) Calculate R
T
.
R
T
V
IN min
V
FF min
T
ON
(
max
)
C
T
R
T
= 51.1 k
(3) R
DISCH
R
DISCH
30
R
T
1
V
FF(min)
V
IN(min)
R
T
C
T
T
OFF(min)
R
DISCH
= 383 k
.
I
DISCH
must be between 25
μ
A and 250
μ
A over the entire VIN range.
With the calculated values, I
DISCH
ranges from 44
μ
A to 193
μ
A, within the allowable range. If I
DISCH
is too high, C
T
must be decreased.
(4) R
FF
R
FF
V
FF(min)
R
DISCH
2
V
IN(min)
1
The nearest 1% standard value to the calculated value is 13.7 k.
相關PDF資料
PDF描述
UCC35705EVM UCC35705 Evaluation Module(UCC35705評估模塊)
UCC3804J Low-Power BiCMOS Current-Mode PWM
UCC1800L Low-Power BiCMOS Current-Mode PWM
UCC1801L Low-Power BiCMOS Current-Mode PWM
UCC1802L Low-Power BiCMOS Current-Mode PWM
相關代理商/技術參數(shù)
參數(shù)描述
UCC35706DGKTRG4 功能描述:電壓模式 PWM 控制器 High Speed Vltg Mode RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
UCC35706DR 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SMPS Controller
UCC35706DTR 功能描述:電壓模式 PWM 控制器 High Speed Vltg Mode RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
UCC35706DTRG4 功能描述:電壓模式 PWM 控制器 High Speed Vltg Mode RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
UCC35706P 功能描述:電壓模式 PWM 控制器 High Speed Vltg Mode RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel