參數(shù)資料
型號(hào)： L6725ATR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
封裝： SOP-16
文件頁(yè)數(shù)： 7/34頁(yè)
文件大?。?/td> 962K
代理商： L6725ATR
L6725 - L6725A
Device description
15/32
5.9
Hiccup mode
During the soft-start phase the OCP provides a constant-current-protection. If during the TON
the OCH comparator triggers an over current the high-side MOSFET(s) is immediately turned
OFF (after the masking time and the internal delay) and returned on at the next pwm cycle. The
limit of this protection is that the TON cannot be less than masking time plus propagation delay,
because during the masking time the peak-current-protection is disabled. In case of very hard
short circuit, even with this short TON, the current could escalate. The valley-current-protection
is very helpful in this case to limit the current. If during the off-time the OCL comparator triggers
an over current, the high-side MOSFET(s) is not turned on until the current is over the valley-
current-limit. This implies that, if it is necessary, some pulses of the high-side MOSFET(s) will
be skipped, guaranteeing a maximum current due to the following formula:
5.10
Thermal shutdown
When the junction temperature reaches 150°C ±10°C the device enters in thermal shutdown.
Both MOSFETs are turned OFF and the soft-start capacitor is rapidly discharged with an
internal switch. The device does not restart until the junction temperature goes down to 120°C
and, in any case, until the voltage at the soft-start pin reaches 500mV.
Figure 9.
Constant current and Hiccup Mode during an OCP.
VSS
VCOMP
IL
MIN
ON
VALLEY
MAX
T
L
Vout
Vin
I
,
+
=
(1)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6725TR 功能描述:電壓模式 PWM 控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)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
L6726 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT
L6726_08 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT
L6726_12 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT
L6726A 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Sngl phase PWM controller 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
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