參數(shù)資料
型號(hào)： TDA4605
廠商： INFINEON TECHNOLOGIES AG
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PDIP8
封裝： PLASTIC, DIP-8
文件頁(yè)數(shù)： 19/21頁(yè)
文件大?。?/td> 631K
代理商： TDA4605
Semiconductor Group
39
TDA 4605
Pin 8
The zero detector controlling the logic block recognizes the transformer being discharged by
positive to negative zero crossing of pin 8 voltage and enables the logic for a new pulse. Parasitic
oscillations occurring at the end of a pulse cannot lead to a new pulse (double-pulsing), because an
internal circuit inhibits the zero detector for a finite time
tUL after the end of each pulse.
Start-Up Behaviour
The start-up behaviour of the application circuit per sheet 48 is represented on sheet 50 for a line
voltage barely above the lower acceptable limit voltage value (without soft-start). After applying the
line voltage at the time
t0 to the tollowing voltages built up:
–
V6 corresponding to the half-wave charge current over R 1
–
V2 to V2 max (typically 6.6 V)
–
V3 to the value determined by the divider R 10/R 11 .
The current drawn by the IC in this case is less than 1.6 mA. If
V6 reaches the threshold V6E (time
point
t1), the IC switches on the internal reference voltage. The currentdraw max. rises to 12 mA.
The primary current- voltage reproducer regulates
V2 down to V2E and the starting impulse
generator generates the starting impulses from time point
t5 to t6 . The feedback to pin 8 starts the
next impulse and so on. All impulses including the starting impulse are controlled in width by
regulating voltage of pin 1. When switching on this corresponds to a short-circuit event, i.e.
V1 = 0.
Hence the IC starts up with "short-circuit impulses" to assume a width depending on the regulating
voltage feedback (the IC operates in the overload range). The maximum pulse width is reached at
time point
t2 (V2 = V2 max). The IC operates at the overload point. Thereafter the peak values ot V2
decrease rapidly, as the IC is operating within the regulation range. The regulating loop has built
up. If voltage
V6 falls below the switch-off threshold V6 min before the reversal point is reached, the
starting attempt is aborted (pin 5 is switched to low). As the IC remains switched on,
V6 further
decreases to
V6 . The IC switches off; V6 can rise again (time point 14) and a new start-up attempt
begins at time point
t1 . If the rectified alternating line voltage (primary voltage) collapses during
load,
V3 can fall below V3A , as is happening at time point t3 (switch-on attempt when voltage is too
low). The primary voltage monitor then clamps
V3 to V3S until the IC switches off (V6 < V6A). Then
a new start-up attempt begins at time point
t1 .
相關(guān)PDF資料
PDF描述
TDA4700A 0.07 A SWITCHING CONTROLLER, 100 kHz SWITCHING FREQ-MAX, PDIP24
TDA4814A 0.5 A POWER FACTOR CONTROLLER, PDIP14
TDA4817 POWER FACTOR CONTROLLER, 50 kHz SWITCHING FREQ-MAX, PDIP8
TDA7427 PLL FREQUENCY SYNTHESIZER, 200 MHz, PDIP20
TDA8035HN/C1 SPECIALTY ANALOG CIRCUIT, PQCC32
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA4605_03 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS TRANSISTORS
TDA46052 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TDA4605-2 功能描述:軟開(kāi)關(guān) PWM 控制器 CTRL IC FOR SWITCH MODE PWR SUPPLIES RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:30 V 電源電流: 最大工作溫度:+ 105 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
TDA46052HKLA1 制造商:Infineon Technologies AG 功能描述:Controller Switch Mode Power Supply 8-Pin PDIP 制造商:Infineon Technologies AG 功能描述:IC POWER SUPPLY CONTROLLER 8DIP
TDA46053 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*