参数资料
型号: BD9775FV-E2
厂商: Rohm Semiconductor
文件页数: 23/30页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM 28-SSOP
标准包装: 1
PWM 型: 控制器
输出数: 1
频率 - 最大: 550kHz
占空比: 48%
电源电压: 6 V ~ 30 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 28-LSSOP(0.220",5.60mm)
包装: 标准包装
产品目录页面: 1373 (CN2011-ZH PDF)
其它名称: BD9775FV-E2DKR
2) Oscillator Synchronization by External Pulse Signal
At the operation the oscillator is externally synchronized, input the synchronization signal into Fin in addition to connect a
resistor and a capacitor at RT and CT, respectively.
Input the external clock pulse on Fin, which is higher frequency than the fixed one. However, the frequency variation
should be less than 20%.
Also, the duty cycle of the pulse should be set from 10% to 90%.
Fin
: Fixed with RT and CT
CT
: Synchronized
CT Waveform during Synchronized with External Pulse
Short Fin to GND if the function of external synchronization is not needed.
Fin
Without Synchronization Signal
3)Setting the Over Current Threshold Level
The OCP detection level ( Iocp ) is determined by the ON resistance (R ON ) of the main MOSFET switch and the resistance
(Rcl) which is placed between CL and VCC.
Iocp =
Rcl
× 10 -5
[A]
( typ. )
R ON
To prevent a malfunction caused by noise, place a capacitor ( Ccl ) parallel to Rcl.
If OCP function is not needed, short VS to VCC, and short CL to GND.
VCC
Rcl
CL
VS
With OCP
Ccl
To Main MOSFET Drain
CL, VS Pin Connection
23/29
Without OCP
CL
VS
VCC
相关PDF资料
PDF描述
BD9778HFP-TR IC REG BUCK ADJ 2A HRP7
BD9845FV-E2 IC REG CTRLR BUCK PWM 14-SSOP
BD9851EFV-E2 IC REG CTRLR BST INV HTSSOP-B20
BD9853AFV-E2 IC REG CTRLR BUCK PWM 16-SSOP
BD9862MUV-E2 IC PMIC PS TFT-LCD 24VQFN
相关代理商/技术参数
参数描述
BD9778F 制造商:ROHM 制造商全称:Rohm 功能描述:Flexible Step-Down Switching Regulator
BD9778F_10 制造商:ROHM 制造商全称:Rohm 功能描述:Flexible Step-down Switching Regulators with Built-in Power MOSFET
BD9778F-E2 功能描述:直流/直流开关调节器 FLEXIBLE STEP-DOWN SWITCHING REGULATOR RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
BD9778HFP 制造商:ROHM 制造商全称:Rohm 功能描述:Flexible Step-down Switching Regulators with Built-in Power MOSFET
BD9778HFP-TR 功能描述:直流/直流开关调节器 IC SW 2A P-CH MOSF STDN RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5