參數資料
型號: L6730CQ
廠商: 意法半導體
英文描述: Adjustable step-down controller with synchronous rectification
中文描述: 可調式降壓同步整流控制器
文件頁數: 29/50頁
文件大小: 1394K
代理商: L6730CQ
L6730C - L6730D
Device description
29/50
5.14.2 No-sink at zero current operation
The L6730C can work in no-sink mode. If output current is zero the converter skip some pulses
and works with a lower switching frequency. Between two pulses can pass a relatively long time
(say 200-300μs) during which there’s no switching activity and the current into the inductor is
zero. In this condition the phase node is at the output voltage and in some cases this is not
enough to keep the bootstrap cap charged. For example, if Vout is 3.3V the voltage across the
bootstrap cap is only 1.7V. The high-side MOSFET cannot be effectively turned-on and the
regulation can be lost. Thanks to the “bootstrap anti-discharging system” the bootstrap cap is
always kept charged. The following picture shows the behaviour of the device in the following
conditions: 12V
3.3V@0A.
It can be observed that between two pulses trains the low-side is turned-on in order to keep the
bootstrap cap charged.
Figure 24. 12V -> 3.3V@0A in no-sink
Pulse train
Minimum Bootstrap Voltage
V
PHASE
I
L
相關PDF資料
PDF描述
L6730C Adjustable step-down controller with synchronous rectification
L6730CQTR Adjustable step-down controller with synchronous rectification
L6730CTR Adjustable step-down controller with synchronous rectification
L6730D Adjustable step-down controller with synchronous rectification
L6730DTR Adjustable step-down controller with synchronous rectification
相關代理商/技術參數
參數描述
L6730CQTR 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification
L6730CTR 功能描述:IC REG CTRLR BUCK PWM VM 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP(0.300",7.62mm) 包裝:管件 產品目錄頁面:1316 (CN2011-ZH PDF)
L6730D 功能描述:IC REG CTRLR BUCK PWM VM 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP(0.300",7.62mm) 包裝:管件 產品目錄頁面:1316 (CN2011-ZH PDF)
L6730DTR 功能描述:IC REG CTRLR BUCK PWM VM 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP(0.300",7.62mm) 包裝:管件 產品目錄頁面:1316 (CN2011-ZH PDF)
L6730TR 功能描述:DC/DC 開關控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK