參數資料
型號: L6730C
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: 13/50頁
文件大小: 1394K
代理商: L6730C
L6730C - L6730D
Device description
13/50
5
Device description
5.1
Oscillator
The switching frequency is internally fixed to 400KHz. The internal oscillator generates the
triangular waveform for the PWM charging and discharging an internal capacitor (F
SW
=
400KHz). This current can be varied using an external resistor (R
T
) connected between OSC
pin and GND or V
CCDR
in order to change the switching frequency. Since the OSC pin is
maintained at fixed voltage (typ. 1.2V), the frequency is increased (decreased) proportionally to
the current sunk (sourced) from (into) the pin. In particular, connecting R
T
versus GND the
frequency is increased (current is sunk from the pin), according to the following relationship:
Connecting R
T
to V
CCDR
the frequency is reduced (current is sourced into the pin), according to
the following relationship:
Switching frequency variation vs. R
T
is shown in
Figure 3.
.
Figure 3.
Switching frequency variation versus R
T
.
)
(
10
K
88
.
R
400
6
+
=
KHz
Fsw
OSC
(1)
)
(
10
K
01
.
R
400
7
=
KHz
Fsw
OSC
(2)
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
0
100
200
300
400
500
600
700
800
900 1000
Rosc (KOHM)
F
Rosc connected to GND
Rosc connected to Vccdr
相關PDF資料
PDF描述
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
L6730 Adjustable step-down controller with synchronous rectification
相關代理商/技術參數
參數描述
L6730CQ 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification
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)